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United States Department of Agriculture

Agricultural Research Service

Related Topics

Douglas Karlen (Doug)
Soil, Water & Air Resources Research
Plant Pathology

Phone: (515) 294-3336
Fax: (515) 294-8125

USDA, ARS
2110 UNIVERSITY BLVD.
AMES , IA 50011

Projects
Implementing Sustainable Landscape Designs for Operating Bioenergy Supply Systems
General Cooperative Agreement (A)
  Accession Number: 431575
Implementing Sustainable Landscape Designs for Great Plains Bioenergy Supply Systems
General Cooperative Agreement (A)
  Accession Number: 431576
Implementing Sustainable Landscape Designs for Midwestern Bioenergy Supply Systems
General Cooperative Agreement (A)
  Accession Number: 431577
Soil Management for Enhanced Agricultural Productivity and Sustainable Biofuel Feedstock Production
Appropriated (D)
  Accession Number: 430830
Gathering Information from Collaborative Research and Data Networking Workshop
Grant (G)
  Accession Number: 431135
Enabling Sustainable Landscape Design for Continual Improvement of Operating Bioenergy Supply Systems
Interagency Reimbursable Agreement (I)
  Accession Number: 430096
SUSTAINABLE PRODUCTION AND DISTRIBUTION OF BIOENERGY FOR THE CENTRAL USA
Reimbursable (R)
  Accession Number: 422917
Evaluation of an Improved Combine Head for Single-Pass Corn Stover Harvest
Specific Cooperative Agreement (S)
  Accession Number: 431490
Resilient Cropping Systems for Food and Bioenergy
Trust (T)
  Accession Number: 425539

Publications (Clicking on the reprint icon Reprint Icon will take you to the publication reprint.)
Visual soil structure effects of tillage and corn stover harvest in Iowa, U.S.A. -
Tormena, C.A., Karlen, D.L., Logsdon, S.D., Cherubin, M. 2016. Visual soil structure effects of tillage and corn stover harvest in Iowa, U.S.A. Soil Science Society of America Journal. 80:720-26. doi: 10.2136/sssaj2015.12.0425.
Carbohydrate and nutrient composition of corn stover from three Southeastern USA locations Reprint Icon -
Mourtzinis, S., Cantrell, K.B., Arriaga, F.J., Balkcom, K.S., Novak, J.M., Frederick, J.R., Karlen, D.L. 2015. Carbohydrate and nutrient composition of corn stover from three Southeastern USA locations. Biomass and Bioenergy. 85:153-158.
Soil degradation: Will humankind ever learn? -
Karlen, D.L., Rice, C.W. 2015. Soil degradation: Will humankind ever learn? Sustainability. 7:12490-12501.
The soil management assessment framework: A potential soil health assessment tool -
A VESS assessment of tillage and stover harvest effects in Iowa, U.S.A.GE -
Evaluating Brazilian sugarcane expansion effects on soil structure using VESS -
Least limiting water range of soils -
Predicted soil management and climate change effects on SOC in South Carolina -
Corn stover nutrient removal estimates for Central Iowa, U.S.A. -
Karlen, D.L., Kovar, J.L., Birrell, S.J. 2015. Corn stover nutrient removal estimates for Central Iowa, U.S.A.. Sustainability. 7:8621-8634.
Balancing energy, conservation, and soil health requirements for plant biomass -
Karlen, D.L., Beeler, L.W., Ong, R.G., Dale, B.E. 2015. Balancing energy, conservation, and soil health requirements for plant biomass. Journal of Soil and Water Conservation. 70:279-287.
Soil organic carbon and total nitrogen responses after 34 years of tillage of a sandy ultisol -
Chapter 14 -- Case studies -
Leal, M.R., Da Carvalho Macedo, I., Von Maltitz, G., Fungtammasan, B., Van Der Wielen, L., Karlen, D.L., Muth, D.J., Youngs, H., Samseth, J., Autrey, L.J., De Souza, Z.J. 2015. Chapter 14 -- Case studies. Book Chapter. In: G.M. Souza, R.L. Victoria, C.A. Joly, and L.M. Verdade (eds). Bioenergy & Sustainability: Bridging the gaps. SCOPE. Paris Cedex 15, France. 779 pp..
Conservation effects on soil quality indicators in the Missouri Salt River Basin -
Veum, K.S., Kremer, R.J., Sudduth, K.A., Kitchen, N.R., Lerch, R.N., Baffaut, C., Stott, D.E., Karlen, D.L., Sadler, E.J. 2015. Conservation effects on soil quality indicators in the Missouri Salt River Basin. Journal of Soil and Water Conservation. 70:232-246. DOI: 10.2489/jswc.70.4.232.
Is cellulosic biofuel a threat or driver for soil conservation? -
Karlen, D.L. 2015. Is cellulosic biofuel a threat or driver for soil conservation? In: Serrano, L., Aller, D., editors. Getting Into Soil and Water. Ames, IA:Iowa State University. p. 18-19.
Soil quality impacts of current South American agricultural practices -
Wingeyer, A.B., Amado, T.J., Bidegain, M.P., Studdert, G., Perdomo Varela, C.H., Garcia, F., Karlen, D.L. 2015. Soil quality impacts of current South American agricultural practices. Sustainability. 7:2213-2242.
Profile distribution of available potassium in Des Moines Lobe soils -
Vertical distribution of structural components in corn stover -
Johnson, J.M., Karlen, D.L., Gresham, G.L., Cantrell, K.B., Archer, D.W., Wienhold, B.J., Varvel, G.E., Laird, D.A., Baker, J.M., Ochsner, T.E., Novak, J.M., Halvorson, A.D., Arriaga, F., Lightle, D.T., Hoover, A., Emerson, R., Barbour, N.W. 2014. Vertical distribution of structural components in corn stover. Agriculture. 4:274-287. doi: 10.3390/agriculture4040274.
Opportunities for energy crop production based on subfield scale distribution of profitability -
Bonner, I.J., Cafferty, K.G., Muth Jr., D.J., Tomer, M.D., James, D.E., Porter, S.A., Karlen, D.L. 2014. Opportunities for energy crop production based on subfield scale distribution of profitability. Energies. 7:6509-6526.
Soil quality index comparisons using Fort Cobb Oklahoma watershed-scale land management data Reprint Icon -
Zobeck, T.M., Steiner, J.L., Stott, D.E., Duke, S.E., Starks, P.J., Moriasi, D.N., Karlen, D.L. 2015. Soil quality index comparisons using Fort Cobb, Oklahoma, watershed-scale land management data. Soil Science Society of America Journal. 79(1):224-238.
Understanding nitrogen, phosphorus, potassium and other nutrient impacts of corn stover harvest -
Crop yield responses to a hardwood biochar across varied soils and climate conditions -
Conservation effects on soil quality indicators in the Missouri Salt River basin -
Veum, K.S., Kremer, R.J., Sudduth, K.A., Kitchen, N.R., Lerch, R.N., Baffaut, C., Stott, D.E., Karlen, D.L., Sadler, E.J. 2014. Conservation effects on soil quality indicators in the Missouri Salt River basin. ASA-CSSA-SSSA Annual Meeting Abstracts. Poster number 1937.
Sustainable corn stover harvest strategies for Midwest agricultural landscapes -
Corn stover nutrient removal estimates for central Iowa -
Karlen, D.L., Kovar, J.L., Birrell, S.J. 2015. Corn stover nutrient removal estimates for central Iowa. Scientific and Technical Review. 7:8621-8634. DOI:10.3390/su7078621.
Surface soil quality in five midwestern cropland Conservation Effects Assessment Project watersheds Reprint Icon -
Karlen, D.L., Stott, D.E., Cambardella, C.A., Kremer, R.J., King, K.W., McCarty, G.W. 2014. Surface soil quality in five midwestern cropland Conservation Effects Assessment Project watersheds. Journal of Soil and Water Conservation. 69(5):393-401.
Soil and water conservation: Our history and future challenges Reprint Icon -
Karlen, D.L., Peterson, G.A., Westfall, D.G. 2014. Soil and water conservation: Our history and future challenges. Soil Science Society of America Journal. 78:1493-1499.
Biochar impact on Midwestern mollisols and maize nutrient availability -
Rogovska, N.P., Laird, D.L., Fleming, P.D., Karlen, D.L., Rathke, S. 2014. Biochar impact on Midwestern mollisols and maize nutrient availability. Geoderma. 230-231:340-347.
The author’s opportunity and obligation -
Karlen, D.L. 2014. The author’s opportunity and obligation. Soil & Tillage Research. 144:232-233.
Suggested strategies to attract reviewers for soil & tillage research submissions -
Karlen, D.L. 2014. Suggested strategies to attract reviewers for soil & tillage research submissions. Soil & Tillage Research. 144:228-231.
Drought effects on composition and yield for corn stover, mixed grasses, and Miscanthus as bioenergy feedstocks -
Emerson, R., Hoover, A., Ray, A., Lacey, J., Cortez, M., Payne, C., Karlen, D.L., Birrell, S., Laird, D., Kallenbach, R., Egenolf, J., Sousek, M., Voigt, T. 2014. Drought effects on composition and yield for corn stover, mixed grasses, and Miscanthus as bioenergy feedstocks. Biofuels. 5:275-291.
Influence of corn residue harvest management on grain, stover, and energy yields -
Cantrell, K.B., Novak, J.M., Frederick, J.R., Karlen, D.L., Watts, D.W. 2014. Influence of corn residue harvest management on grain, stover, and energy yields. BioEnergy Research. 7(2):590-597.
Modeled impacts of cover crops and vegetative barriers on corn stover availability and soil quality -
Bonner, I.J., Muth, D.J., Koch, J.B., Karlen, D.L. 2014. Modeled impacts of cover crops and vegetative barriers on corn stover availability and soil quality. BioEnergy Research. 7:576-589.
Distribution of structural carbohydrates in corn plants across the southeastern USA Reprint Icon -
Mourtzinis, S., Cantrell, K.B., Arriaga, F., Balkcom, K.S., Novak, J.M., Frederick, J.R., Karlen, D.L. 2014. Distribution of structural carbohydrates in corn plants across the southeastern USA. BioEnergy Research. 7(2):551-558.
Crop residue harvest economics: An Iowa and North Dakota case study Reprint Icon -
Archer, D.W., Karlen, D.L., Liebig, M.A. 2014. Crop residue harvest economics: An Iowa and North Dakota case study. BioEnergy Research. 7(2):568-575.
Crop residue considerations for sustainable biomass feedstock supplies -
Karlen, D.L. 2014. Crop residue considerations for sustainable biomass feedstock supplies. American Society of Agriculture and BioSystems Engineering (ASABE) Agricultural Equipment Technology Conference, February 10-14, 2014, Louisville, KY. Available at: www.asabe.org/media/159811/aetc_prelimininary_program2.pdf.
Utilizing LEAF to increase biomass feedstock supplies from agricultural land -
Karlen, D.L., Muth, D.J. 2014. Utilizing LEAF to increase biomass feedstock supplies from agricultural land. Soil's Role in Restoring Ecosystem Services, March 6-9, 2014, Sacramento, CA. Available at: https://scisoc.confex.com/\scisoc/2014SES/webprogram/Paper84588.html.
Soil greenhouse gas emissions in response to corn stover removal and tillage management across the US corn belt Reprint Icon -
Jin, V.L., Baker, J.M., Johnson, J.M., Karlen, D.L., Lehman, R.M., Osborne, S.L., Sauer, T.J., Stott, D.E., Varvel, G.E., Venterea, R.T., Schmer, M.R., Wienhold, B.J. 2014. Soil greenhouse gas emissions in response to corn stover removal and tillage management across the US corn belt. BioEnergy Research. 7(2):517-527. DOI: 10.1007/S12155-014-9421-0.
Crop residue considerations for sustainable bioenergy feedstock supplies -
Karlen, D.L., Johnson, J.M. 2014. Crop residue considerations for sustainable bioenergy feedstock supplies. BioEnergy Research. 7:465-467.
Multi-location corn stover harvest effects on crop yields and nutrient removal -
Karlen, D.L., Birrell, S.J., Johnson, J.M., Osborne, S.L., Schumacher, T.E., Varvel, G.E., Ferguson, R.B., Novak, J.M., Fredrick, J.R., Baker, J.M., Lamb, J.A., Adler, P.R., Roth, G.W., Nafziger, E.D. 2014. Multi-location corn stover harvest effects on crop yields and nutrient removal. BioEnergy Research. 7:528-539.
Development of sustainable corn stover harvest strategies for cellulosic ethanol -
Birrell, S.J., Karlen, D.L., Wirt, A. 2014. Development of sustainable corn stover harvest strategies for cellulosic ethanol. BioEnergy Research. 7:509-516.
Crop residue mass needed to maintain soil organic carbon levels: Can it be determined? Reprint Icon -
Johnson, J.M., Novak, J.M., Varvel, G.E., Stott, D.E., Osborne, S.L., Karlen, D.L., Lamb, J.A., Baker, J.M., Adler, P.R. 2014. Crop residue mass needed to maintain soil organic carbon levels: Can it be determined? BioEnergy Research. DOI: 10.1007/s12155-013-9402-8.
LLWR techniques for quantifying potential soil compaction consequences of crop Reprint Icon -
Benjamin, J.G., Karlen, D.L. 2014. LLWR techniques for quantifying potential soil compaction consequences of crop. BioEnergy Research. 7:468-480.
Resource Assessment and Tools -
Karlen, D.L., Muth, D.J. 2013. Resource Assessment and Tools. 3rd Sino-U.S. Advanced Biofuels Forum, December 9-13, 2013, Beijing, China. Available at: http://www.ebiomass.cn/meeting/forum2013/hynr/huiyidongtai_nr10.html.
Standards, Certification, and Indicators for Biofuel Sustainability: A review of the CSBP, BMAS and Global Bioenergy Partnership (GBEP) -
Karlen, D.L. 2013. Standards, Certification, and Indicators for Biofuel Sustainability: A review of the CSBP, BMAS and Global Bioenergy Partnership (GBEP). 3rd Sino-U.S. Advanced Biofuels Forum, December 9-13, 2013, Beijing, China. Available at: http://www.ebiomass.cn/meeting/forum2013/hynr/huiyidongtai_nr6.html.
Corn stover biofuel potential and nutrient removal across the Southeastern US. -
Mourtzinis, S., Cantrell, K.B., Arriaga, F.J., Balkcom, K.S., Novak, J.M., Frederick, J.R., Karlen, D.L. 2013. Corn stover biofuel potential and nutrient removal across the Southeastern US [abstract]. American Society of Agronomy Meetings. CDROM.
Double cropping opportunities for biomass crops in the North Central USA -
Moore, K.J., Karlen, D.L. 2014. Double cropping opportunities for biomass crops in the North Central USA. Biofuels. 4:605-615.
Future prospects for corn as a biofuel crop -
Moore, K.J., Karlen, D.L., Lamkey, K.R. 2014. Future prospects for corn as a biofuel crop. In: Goldman, S.L., Chittaranjan, K., editors. Compendium of Bioenergy Plants. Boca Raton, FL: CRC Press, Taylor & Taylor Francis Group. p. 331-352.
Soil aggregation response to harvesting corn stover for bioenergy production -
Introducing the GRACEnet/REAP data contribution, discovery and retrieval system -
Del Grosso, S.J., White, J.W., Wilson, G., Vandenberg, B.C., Karlen, D.L., Follett, R.F., Johnson, J.M., Franzluebbers, A.J., Archer, D.W., Gollany, H.T., Liebig, M.A., Ascough II, J.C., Reyes-Fox, M.A., Starr, J.L., Barbour, N.W., Polumsky, R.W., Gutwein, M., James, D.E., Pellack, L.S. 2013. Introducing the GRACEnet/REAP data contribution, discovery and retrieval system. Journal of Environmental Quality. 42:1274-1280. DOI:10.2134/jeq2013.03.0097.
Selected global examples of cellulosic cropping system trends -
Karlen, D.L., Galdos, M.V., Rabelo, S.C., Franco, H.C., Bonomi, A., Li, J., Li, S., Ovard, L. 2014. Selected global examples of cellulosic cropping system trends. In: Karlen, D.L., editor. Cellulosic Energy Cropping Systems. Hoboken, NJ: John Wiley & Sons, Ltd. p. 345-364.
Tillage and crop rotation effects on soil quality in two Iowa fields -
Karlen, D.L., Cambardella, C.A., Kovar, J.L., Colvin, T.S. 2013. Tillage and crop rotation effects on soil quality in two Iowa fields. Soil & Tillage Research. 133:54-64.
Fluid fertilizer's role in sustaining soils used for bio-energy feedstock production -
Kovar, J.L., Karlen, D.L. 2013. Fluid fertilizer's role in sustaining soils used for bio-energy feedstock production. In: Leikman, D.F., editor. Fluid Fertilizer Foundation Symposium Proceedings, February 18-20, 2013, Scottsdale, Arizona. Available: http://www.fluidfertilizer.com/Forum%.20Presentations/2013/Proceedings/Kovar%202013%20Proceedings.pdf.
Assessment of near-surface soil carbon content across several U.S. cropland watersheds -
Stott, D.E., Cambardella, C.A., Karlen, D.L. 2014. Assessment of near-surface soil carbon content across several U.S. cropland watersheds. In: Hardemink, A.E., McSweeney, K. (eds.) Soil Carbon. Cham, Zug:Springer International Publishing. p. 249-256.
A soil quality and metabolic activity assessment after fifty-seven years of agricultural management -
Stott, D.E., Karlen, D.L., Cambardella, C.A., Harmel, R.D. 2013. A soil quality and metabolic activity assessment after fifty-seven years of agricultural management. Soil Science Society of America Journal. 77(3):903-913.
Thirty-year tillage effects on crop yield and soil fertility indicators Reprint Icon -
Karlen, D.L., Kovar, J.L., Cambardella, C.A., Colvin, T.S. 2013. Thirty-year tillage effects on crop yield and soil fertility indicators. Soil & Tillage Research. 130:24-41.
Corn stover management effects on soil organic carbon contents from several U.S. locations -
Johnson, J.M., Varvel, G.E., Stott, D.E., Osborne, S.L., Novak, J.M., Karlen, D.L., Lamb, J., Baker, J.M. 2012. Corn stover management effects on soil organic carbon contents from several U.S. locations. Meeting Abstract. [abstract] 2012 Sun Grant Conference. p. 40.
Corn stover management effects on soil organic carbon contents from several U.S. locations -
Johnson, J.M., Varvel, G.E., Stott, D.E., Osborne, S.L., Novak, J.M., Karlen, D.L., Lamb, J., Baker, J.M. 2012. Corn stover management effects on soil organic carbon contents from several U.S. locations. In: Proceedings of the Sun Grant National Conference. Science for Biomass Feedstock Production and Utilization, October 2-5, 2012, New Orleans, Louisiana. Available: http://sungrant.tennessee.edu/NatConference/ConferenceProceedings/.
Corn grain, stover yield and nutrient removal validations at regional partnership sites -
Karlen, D.L., Birrell, S.J., Johnson, J.M., Osborne, S.L., Schumacher, T.E., Varvel, G.E., Ferguson, R.B., Novak, J.M., Fredrick, J.R., Baker, J.M., Lamb, J.A., Adler, P.R., Roth, G., Nafziger, E.D. 2013. Corn grain, stover yield and nutrient removal validations at regional partnership sites. Proceedings of the Sun Grant National Conference, October 2-5, 2012, New Orleans, LA. Available: http://sungrant.tennessee.edu/NatConference/ConferenceProceedings/.
Greenhouse gas fluxes in response to corn stover harvest -
Jin, V.L., Baker, J.M., Johnson, J.M., Karlen, D.L., Lehman, R.M., Osborne, S.L., Sauer, T.J., Stott, D.E., Varvel, G.E., Venterea, R.T. 2012. Greenhouse gas fluxes in response to corn stover harvest. In: Proceedings of the Sun Grant National Conference. Science for Biomass Feedstock Production and Utilization, October 2-5, 2012, New Orleans, Louisiana. Available: http://sungrant.tennessee.edu//NatConference/ConferenceProceedings/.
Value of fluid fertilizer in bio-energy production -
Kovar, J.L., Karlen, D.L. 2012. Value of fluid fertilizer in bio-energy production. Fluid Journal. 20:6-9.
Economics of residue harvest: Regional partnership evaluation -
Archer, D.W., Muth, D.J., Jacobson, J.J., Karlen, D.L. 2013. Economics of residue harvest: Regional partnership evaluation. Proceedings from Sun Grant National Conference: Science for Biomass Feedstock Production and Utilization, New Orleans, LA. Meeting Proceedings. http://sungrant.tennessee.edu/NatConference/.
Distribution of energy content in corn plants as influenced by corn residue management -
Cantrell, K.B., Novak, J.M., Frederick, J.R., Karlen, D.L., Watts, D.W. 2012. Distribution of energy content in corn plants as influenced by corn residue management. In: Proceedings from Sun Grant National Conference: Science for Biomass Feedstock Production and Utilization, October 2-5, 2012, New Orleans, Louisana. pp.5. Available:http://sungrant.tennessee.edu/NatConference/Agenda.
Distribution of structural carbohydrates in corn plants as influenced by corn residue management -
Mourtzinis, S., Cantrell, K.B., Arriaga, F., Novak, J.M., Frederick, J.R., Karlen, D.L. 2012. Distribution of structural carbohydrates in corn plants as influenced by corn residue management [abstract]. In: Proceedings from Sun Grant National Conference: Science for Biomass Feedstock Production and Utilization, October 2-5, 2012, New Orleans, Louisiana. pp. 3. Available:http://sungrant.tennessee.edu/NatConference/Agenda.
Landscape management for sustainable supplies of bioenergy feedstock and enhanced soil quality -
Karlen, D.L., Muth, Jr., D.J. 2013. Landscape management for sustainable supplies of bioenergy feedstock and enhanced soil quality. Agrociencia. 17(2):121-130.
Corn stover harvest strategy effects on grain yield and soil quality indicators -
Karlen, D.L., Birrell, S.J., Wirt, A.R., Schock, N. 2013. Corn stover harvest strategy effects on grain yield and soil quality indicators. Agrociencia. 17(2):121-140.
Corn grain, stover yield, and nutrient removal validations at regional partnership sites -
Karlen, D.L., Birrell, S.J., Johnson, J.M., Osborne, S.L., Schumacher, T.E., Varvel, G.E., Ferguson, R.B., Novak, J.M., Fredrick, J.R., Baker, J.M., Lamb, J.A., Adler, P.R., Roth, G.W., Nafziger, E.D. 2012. Corn grain, stover yield, and nutrient removal validations at regional partnership sites. Proceedings of the Sun Grant National COnference, October 2-5, 2012, New Orleans, LA. Available: http://sungrant.tennessee.edu/NatConference/ConferenceProceedings/.
Soil management challenges in response to climatic change -
Karlen, D.L. 2012. Soil management challenges in response to climatic change. In: ASA-CSSA-SSSA Annual Meeting Abstracts, October 21-24, 2012, Cincinnati, OH. Available: https://dl.sciencesocieties.org/publications/meetings/2012am/9971/.
Carbon dioxide and nitrous oxide emissions from soils following corn residue removal for bioenergy production -
Sauer, T.J., Karlen, D.L. 2012. Carbon dioxide and nitrous oxide emissions from soils following corn residue removal for bioenergy production. ASA-CSSA-SSSA Annual Meeting Abstracts. Available: https://dl.sciencesocieties.org/publications/meetings/.
Biochar mitigation of allelopathy induced yield loss in continuous maize -
Laird, D.A., Rogovska, N., Fleming, P.D., Karlen, D.L., Rathke, S. 2012. Biochar mitigation of allelopathy induced yield loss in continuous maize. In: ASA-CSSA-SSSA Annual Meeting Abstracts, Oct. 21-24, 2012, Cincinnati, OH. Available: https://dl.sciencesocieties.org/publications/meetings/.
Revolutionary land use change in the 21st century: Is (rangeland) science relevant? Reprint Icon -
Herrick, J.E., Brown, J., Bestelmeyer, B.T., Andrews, S., Baldi, G., Duniway, M., Havstad, K.M., Karl, J.W., Karlen, D.L., Peters, D.C., Quinton, J.N., Riginos, C., Shaver, P.L., Twomlow, S. 2012. Revolutionary land use change in the 21st century: Is (rangeland) science relevant? Rangeland Ecology and Management. 65:590-598.
Crop residues -
Karlen, D.L., Huggins, D.R. 2014. Crop residues. In: Karlen, D.L., editor. Cellulosic Energy Cropping Systems. Hoboken, NJ: John Wiley & Sons. p. 131-148.
Influence of corn stover harvest on soil quality assessments at multiple locations across the U.S. -
Stott, D.E., Jin, V.L., Ducey, T.F., Karlen, D.L., Varvel, G.E., Johnson, J.M., Baker, J.M., Osborne, S.L., Novak, J.M., Adler, P.R., Roth, G.W., Birrell, S.J. 2013. Influence of corn stover harvest on soil quality assessments at multiple locations across the U.S. [abstract]. In: Proceedings of the 2012 National Conference: Science for Biomass Feedstock Production and Utilization, October 2-5, 2012, New Orleans, LA. Sungrant Initiative. www.sungrant.tennessee.edu/NatConference.
Landscape management for sustainable feedstock supplies and enhanced soil quality -
Karlen, D.L., Muth, D.J. 2012. Landscape management for sustainable feedstock supplies and enhanced soil quality. In: Ernst, O., Perez, M.T., Barbazan M., editors. Proceedings of the 19th Triennial ISTRO Conference, September 24-28, 2012, Montevideo, Uruguay. p. 98-106.
Corn stover harvest strategy effects on grain yield and soil quality indicators -
Karlen, D.L., Birrell, S.J., Wirt, A.R. 2012. Corn stover harvest strategy effects on grain yield and soil quality indicators. In: Ernst, O., Perez, M.T., Barbazan M., editors. Proceedings of the 19th Triennial ISTRO Conference, September 24-28, 2012, Montevideo, Uruguay. p. 51-55.
Biochar mitigation of allelopathy induced yield loss in continuous maize -
Laird, D.A., Rogovska, N., Fleming, P.D., Karlen, D.L., Rathke, S. 2012. Biochar mitigation of allelopathy induced yield loss in continuous maize [abstract]. In: Proceedings of the 2012 US Biochar Conference, 07/29-8/1/2012, Rohnert Park, CA.
Influence of corn stover harvest on soil quality assessments at multiple locations across the U.S. -
Stott, D.E., Jin, V.L., Ducey, T.F., Karlen, D.L., Varvel, G.E., Johnson, J.M., Baker, J.M., Osborne, S.L., Novak, J.M., Adler, P.R., Roth, G.W., Birrell, S.J. 2012. Influence of corn stover harvest on soil quality assessments at multiple locations across the U.S. [abstract]. ASA-CSSA-SSSA Annual Meeting Abstracts, October 21-24, 2012, Cincinnati, Ohio. 2012 CDROM.
Fluid fertilizer's role in sustaining soils used for bio-energy feedstock production -
Kovar, J.L., Karlen, D.L. 2012. Fluid fertilizer's role in sustaining soils used for bio-energy feedstock production. In: Leikam, D.F., editor. Proceedings of the Fluid Fertilizer Foundation Symposium, February 19-21, 2012, Scottsdale, AZ. 29:1-9. Available: http://www.fluidfertilizer.com/fertilizer_forum_proceedings2012.html.
Cropland CEAP soil quality assessment update -
Karlen, D.L., Stott, D.E. 2012. Cropland CEAP soil quality assessment update. Soil and Water Conservation Society Proceedings. Available: http://www.swcs.org/documents/filelibrary/12ac/2012_Abstract_Book_7B7F4A470290D.pdf.
Soil quality assessment: John Doran's challenge and the scientific community response -
Karlen, D.L. 2011. Soil quality assessment: John Doran's challenge and the scientific community response. American Society of Agronomy Annual Meetings [abstracts]. ASA-CSSA-SSSA Annual Meeting. Oct. 16-19, 2011, San Antonio, TX. Available: http://www.agronomy.org.
Energy issues affecting corn/soybean systems: Challenges for sustainable production -
Karlen, D.L., Archer, D.W., Liska, A.J., Meyer, S. 2012. Energy issues affecting corn/soybean systems: Challenges for sustainable production. Council for Agricultural Science and Technology Issue Paper. Paper No. 48. Available: http://www.cast-science.org/publications/?energy_issues_affecting_cornsoybean_systems_challenges_for_sustainable_production&show=product&productID=52665.
Crop stubble needs and opportunities -
Karlen, D.L. 2011. Crop stubble needs and opportunities. Western Australia No-Till Farmers Association Newsletter (WANTFA). New Frontiers in Agriculture. 19(3):112-115.
Potential soil quality impact of harvesting crop residues for biofuels -
Karlen, D.L. 2011. Potential soil quality impact of harvesting crop residues for biofuels. Agrociencia Magazine. 15(2):120-127.
The importance of pre-conversion technologies for coupling sustainable bioenergy land use to biomass trade -
Muth, Jr., D.J., Hess, J., Karlen, D.L. 2011. The importance of pre-conversion technologies for coupling sustainable bioenergy land use to biomass trade. International Energy Agency Workshop. Available: http://www.bioenergytrade.org/downloads/campinas-workshop-final-program-30.8.pdf.
A five-year assessment of corn stover harvest in central Iowa, USA -
Karlen, D.L., Birrell, S.J., Hess, J. 2011. A five-year assessment of corn stover harvest in central Iowa, USA. Soil & Tillage Research. 115-116:47-55.
The Birkás influence on international soil management research and education -
Karlen, D.L. 2012. The Birkás influence on international soil management research and education. In: Birkás, M., editor. Soil School: What to learn from and what to teach about soils. Gödöllo, Hungary: Szent Istvan University Press. p. 145-151.
A soil quality assessment within the Iowa River South Fork Watershed -
Stott, D.E., Cambardella, C.A., Wolf, R., Tomer, M.D., Karlen, D.L. 2011. A soil quality assessment within the Iowa River South Fork Watershed. Soil Science Society of America Journal. 75:2271-2282.
Stover harvest – Safe and sustainable with good resource management practices -
Karlen, D.L., Birrell, S.J. 2011. Stover harvest – Safe and sustainable with good resource management practices. Available: http://www.poet.com/discovery/releases/showRelease.asp?id=274&year=2011&categoryid=0.
Impact of 57 years of management on the soil quality of a Vertisol in Central Texas -
Stott, D.E., Potter, K.N., Karlen, D.L., Cambardella, C.A. 2011. Impact of 57 years of management on the soil quality of a Vertisol in Central Texas [abstract]. Fundamental for Life: Soil, Crop, & Environmental Sciences, ASA-CSSA-SSSA International Annual Meetings in conjunction with the Canadian Society of Soil Science, October 16-19, 2011, San Antonio, Texas. 2011 CDROM.
Quality assurance of weather data for agricultural system model input -
Malone, R.W., Meek, D.W., Ma, L., Jaynes, D.B., Nolan, B.T., Karlen, D.L. 2011. Quality assurance of weather data for agricultural system model input. In: Ahuja, L.R., Ma, L., editors. Methods of Introducing System Models into Agricultural Research. Madison, WI: American Society of Agronomy, Crop Science of America and Soil Science Society of America. p. 283-296.
Impact of conservationpractices on soil quality indicators: case study in the Fort Cobb Reservoir watershed, Oklahoma -
Steiner, J.L., Starks, P.J., Moriasi, D.N., Stott, D.E., Zobeck, T.M., Karlen, D.L. 2011. Impact of conservation practices on soil quality indicators: case study in the Fort Cobb Reservoir watershed, Oklahoma [abstract]. ASA-CSSA-SSSA Annual Meeting, Fundamental for Life: Soil, Crop, & Environmental Sciences, Oct. 16-19, 2011, San Antonio, Texas. Available: http://a-c-s.confex.com/crops/2011am/webprogram/Paper64797.html.
Fluid fertilizer's role in sustaining soils used for bio-energy feedstock production -
Kovar, J.L., Karlen, D.L. 2011. Fluid fertilizer's role in sustaining soils used for bio-energy feedstock production. In: Leikam, D.F. (ed). Fluid Fertilizer Foundation Symposium Proceedings. Fluid Fertilizer Forum, Feb. 20-22, 2011, Scottsdale, AZ. Volume 28. Available: http://www.fluidfertilizer.com/fertilizer_forum_proceedings2011.html.
Feedstock and conversion interactions – identifying industry needs -
Karlen, D.L. 2011. Feedstock and conversion interactions – identifying industry needs. In: Braun, R.B., Karlen, D.L., and Johnson, D., editors. Proc. of Sustainable Feedstocks for Advanced Biofuels: A workshop to create regionally specific roadmaps for feedstock supply chains. Atlanta, GA. Soil and Water Conservation Society Proceedings. p. 31-35.
Where to from here? -
Karlen, D.L. 2011. Where to from here? In: Braun, R.B., Karlen, D.L., and Johnson, D., editors. Proc. of Sustainable Feedstocks for Advanced Biofuels: A workshop to create regionally specific roadmaps for feedstock supply chains. Atlanta, GA. Soil and Water Conservation Society Proceedings. p. 376-378.
Unraveling water quality and quantity effects of biofuels production -
Karlen, D.L. 2011. Unraveling water quality and quantity effects of biofuels production. In: Rudebusch, L., editor. Getting Into Soil & Water. Soil & Water 2011. Soil and Water Conservation Club. Iowa Water Center at Iowa State University. Ames, IA: Experiment Station Bulletins. p. 36-39.
Estimating soil organic carbon using aerial imagery and soil surveys -
Gelder, B.K., Anex, R.P., Kaspar, T.C., Sauer, T.J., Karlen, D.L. 2011. Estimating soil organic carbon using aerial imagery and soil surveys. Soil Science Society of America Journal. 75:1821-1828.
Soil health: The concept, its role, and strategies for monitoring -
Groundwater: Contamination from Nitrogen Fertilizers -
A landscape vision for integrating industrial crops into biofuel systems -
Karlen, D.L. 2010. A landscape vision for integrating industrial crops into biofuel systems. Association for the Advancement of Industrial Crops Conference. Available: http://www.aaic.org/10program.htm#GreenMetricsDivision.
Balancing limiting factors and economic drivers for sustainable midwestern U.S. agricultural residue feedstock supplies Reprint Icon -
Wilhelm, W.W., Hess, J.R., Karlen, D.L., Johnson, J.M., Muth, D.J., Baker, J.M., Gollany, H.T., Novak, J.M., Stott, D.E., Varvel, G.E. 2010. Balancing limiting factors and economic drivers for sustainable midwestern U.S. agricultural residue feedstock supplies. Industrial Biotechnology. 6(5):271-287.
Corn Stover Feedstock Trials to Support Predictive Modeling -
Karlen, D.L. 2010. Corn Stover Feedstock Trials to Support Predictive Modeling. Global Change Biology-Bioenergy. 2:235-247.
Monitoring soil quality to assess the sustainability of harvesting corn stover -
Karlen, D.L., Varvel, G.E., Johnson, J.M., Baker, J.M., Osborne, S.L., Novak, J.M., Adler, P.R., Roth, G., Birrell, S. 2010. Monitoring soil quality to assess the sustainability of harvesting corn stover. Agronomy Journal. 103:288–295.
Conservation Considerations for Sustainable Bioenergy Feedstock Production: If, What, Where, and How Much? -
Johnson, J.M., Karlen, D.L., Andrews, S.S. 2010. Conservation Considerations for Sustainable Bioenergy Feedstock Production: If, What, Where, and How Much? Journal of Soil and Water Conservation Society. 65(4):88A-91A.
Vertical distribution of corn stover dry mass grown at several U.S. locations Reprint Icon -
Wilhelm, W.W., Johnson, J.M., Lightle, D., Karlen, D.L., Novak, J.M., Barbour, N.W., Laird, D.A., Baker, J.M., Ochsner, T.E., Halvorson, A.D., Archer, D.W., Arriaga, F.J. 2011. Vertical distribution of corn stover dry mass grown at several U.S. locations. BioEnergy Research. 4(1):11-21.
Soil Tilth: What every farmer understands but no researcher can define -
Karlen, D.L. 2011. Soil Tilth: What every farmer understands but no researcher can define. In: Glinski, J., Horabik, J., Lipiec, J., editors. Encyclopedia of Agrophysics. Heidelberg, London; New York: Springer Dordrecht. p. 794-798.
Biochar Impact on Nutrient Leaching from a Midwestern Agricultural Soil -
Laird, D.A., Fleming, P.D., Karlen, D.L., Wang, B., Horton, R. 2010b. Biochar Impact on Nutrient Leaching from a Midwestern Agricultural Soil. Geoderma. 158:436-442.
Impact of Biochar Amendments on the Quality of a Typical Midwestern Agricultural Soil -
Laird, D.A., Fleming, P.D., Davis, D.D., Horton, R., Wang, B., Karlen, D.L. 2010a. Impact of Biochar Amendments on the Quality of a Typical Midwestern Agricultural Soil. Soil Science Society of America Journal. 158:443-449.
Future testing opportunities to ensure sustainability of the biofuels industry -
Karlen, D.L., Kerr, B.J. 2012. Future testing opportunities to ensure sustainability of the biofuels industry. Communications in Soil Science and Plant Analysis. 43:(1-2)36-46. DOI:10.1080/00103624.2012.631410.
Soil-test N recommendations augmented with PEST optimized RZWQM simulations -
Malone, R.W., Jaynes, D.B., Ma, L., Nolan, B., Meek, D.W., Karlen, D.L. 2010. Soil-test N recommendations augmented with PEST optimized RZWQM simulations. Journal of Environmental Quality. 39:1711-1723.
Agriculture and land use issues -
Hess, J.R., Jacobson, J.J., Karlen, D.L., Muth, D.J., Nelson, R.G., Ovard, L.P., Searcy, E.M., Ulrich, T.H. 2010. Agriculture and land use issues. In: Rosillo-Calle, Frank and Johnson, Francis X, editors. Food versus Fuel: An Informed Introduction to Biofuels. London, UK: Zed Books Ltd. p. 86-115.
Optimizing Nutrient Management for Sustainable Bio-energy Feedstock Production -
Kovar, J.L., Karlen, D.L. 2010. Optimizing Nutrient Management for Sustainable Bio-energy Feedstock Production. Fluid Journal. 18(3). Available: http://fluidjournal.org/1gsdgfs-S10/S10-A2.pdf
Nutrient removal as a function of corn stover cutting height and cob harvest Reprint Icon -
Johnson, J.M., Wilhelm, W.W., Karlen, D.L., Archer, D.W., Wienhold, B.J., Lightle, D.T., Laird, D.A., Baker, J.M., Ochsner, T.E., Novak, J.M., Halvorson, A.D., Arriaga, F.J., Barbour, N.W. 2010. Nutrient removal as a function of corn stover cutting height and cob harvest. BioEnergy Research. 3:342-352.
High Yields for Enhanced Sustainable Feedstock Production -
Karlen, D.L. 2010. High Yields for Enhanced Sustainable Feedstock Production. In: Exploring Pathways Toward a Sustainable, Domestic Bioindustry, Biomass, March 30-31, 2010, Arlington, VA. p. 54.
Is Sulfur Limiting Maize Grown on Eroded Midwestern U.S. Soils? -
Kovar, J.L., Karlen, D.L. 2010. Is Sulfur Limiting Maize Grown on Eroded Midwestern U.S. Soils? In: Gilkes, R.J. and Prakongkep, N. (ed). Proceedings of the 19th World Congress Soil Science, August 1-6, 2010, Brisbane, Australia. ISBN 978-0-646-53783-2. DVD.
Fluid Fertilizer's Role in Sustaining Soils Used for Bio-fuels Production -
Kovar, J.L., Karlen, D.L. 2010. Fluid Fertilizer's Role in Sustaining Soils Used for Bio-fuels Production. In: Fluid Fertilizer Foundation Symposium Proceedings. Fluid Fertilizer Forum, Feb. 14-16, 2010, Scottsdale, AZ. 2010 CD-ROM, Volume 27.
Tillage and Residue Management Effects on Semi-Arid Mediterranean Soil Quality -
Imaz, M.J., Virto, I., Bescansa, P., Enrique, A., Fernandez-Ugalde, O., Karlen, D.L. 2010. Tillage and Residue Management Effects on Semi-Arid Mediterranean Soil Quality. Soil & Tillage Research. 107:17–25.
Watershed-Scale Soil Quality Assessment: Assessing Reasons for Poor Canopy Development in Corn -
Stott, D.E., Cambardella, C.A., Tomer, M.D., Karlen, D.L. 2010. Watershed-Scale Soil Quality Assessment: Assessing Reasons for Poor Canopy Development in Corn [abstract]. In: Proceedings of the World Congress of Soil Science, August 1-6, 2010, Brisbane, Australia. CD ROM.
Microbial community structure and diversity as indicators for evaluating soil quality -
Sharma, S.K., Aketi, R., Sharma, M.P., Joshi, O., Govaerts, B., Steenwerth, K.L., Karlen, D.L. 2010. Microbial community structure and diversity as indicators for evaluating soil quality. Sustainable Agriculture. 5:317-358.
Indices for soil management decisions -
Karlen, D.L., Wienhold, B.J., Kang, S., Zobeck, T.M., Andrews, S.S. 2011. Indices for soil management decisions. In: Sauer, T.S., Hatfield, J.L., editors. Soil Management: Building a Stable Base for Agriculture. Madison, WI. American Society of Agronomy and Soil Science Society of America, Inc. p. 39-50.
Soil Conditioning Index -
Zobeck, T.M., Norfleet, M.L., Karlen, D.L. 2009. Soil Conditioning Index. In: Lal, R. Encyclopedia of Soil Science. Second Edition. New York, NY: Taylor & Francis Group. Available: http://www.informaworld.com/10.1081/E-ESS-120044014.
Advancing Biofuels: Balancing for Sustainability -
Johnson, J.M., Karlen, D.L. 2009. Advancing Biofuels: Balancing for Sustainability [abstract]. American Chemical Society. 77:122.
Midwest soil and water conservation: Past, present and future -
Karlen, D.L., Dinnes, D.L., Singer, J.W. 2010. Midwest soil and water conservation: Past, present and future. In: Zobeck, T.M., Schillinger, W.F., editors. Soil and Water Conservation Advances in the U.S.: Past Efforts and Future Outlook. Madison, WI: Soil Science Society of America, Inc. p. 131-162.
Quality Assessment of Corn Fields with Areas of Poor Canopy Development -
Stott, D.E., Cambardella, C.A., Tomer, M.D., Karlen, D.L. 2009. Quality Assessment of Corn Fields with Areas of Poor Canopy Development. ASA-CSSA-SSSA Annual Meeting Abstracts. CD ROM.
Corn Stover Feedstock Trial Update and Future Integrative Visioning -
Karlen, D.L. 2009. Corn Stover Feedstock Trial Update and Future Integrative Visioning [CD-ROM]. In: ASA-CSSA-SSSA Annual Meeting Abstracts, Nov. 1-5, 2009, Pittsburgh, PA.
Soil Quality as an Indicator of Sustainable Biofuel Feedstock Production -
Karlen, D.L. 2009. Soil Quality as an Indicator of Sustainable Biofuel Feedstock Production [CD-ROM]. In: ASA-CSSA-SSSA Annual Meeting Abstracts, Nov. 1-5, 2009, Pittsburgh, PA.
No-tillage Improvement of Soil Physical Quality in Calcareous, Degradation-prone, Semiarid Soils -
Fernandez-Ugalde, O., Virto, I., Bescansa, P., Imaz, M.J., Enrique, A., Karlen, D.L. 2009. No-tillage Improvement of Soil Physical Quality in Calcareous, Degradation-prone, Semiarid Soils. Soil & Tillage Research. 106(1):29-35.
Impact of Biochar Amendments on the Quality of a Typical Midwestern Agricultural Soil -
Laird, D.A., Fleming, P.D., Davis, D., Baiqun, W., Horton, R., Karlen, D.L. 2009. Impact of Biochar Amendments on the Quality of a Typical Midwestern Agricultural Soil[CD-ROM]. In: ASA-CSSA-SSSA Annual Meeting Abstracts, Nov. 1-5, 2009, Pittsburgh, PA.
Evaluation of ß-Glucosidase Activity as a Soil Quality Indicator for the Soil Management Assessment Framework (SMAF) Reprint Icon -
Stott, D.E., Andrews, S.S., Liebig, M.A., Wienhold, B.J., Karlen, D.L. 2009. Evaluation of ß-Glucosidase Activity as a Soil Quality Indicator for the Soil Management Assessment Framework (SMAF). Soil Science Society of America Journal. 74(1):107-119.
Distribution of Phosphorus and Potassium Following Surface Banding of Fertilizer in Conservation Tillage Systems -
Kovar, J.L., Bortolon, L., Karlen, D.L. 2009. Distribution of Phosphorus and Potassium Following Surface Banding of Fertilizer in Conservation Tillage Systems. Plant Nutrition Colloquium Proceedings. Available: http://escholarship.org/uc/item/8j0224dq
Bean leaf beetle (Coleoptera: Chrysomelidae) response to soybean variety and organic-compliant treatments in Iowa -
Delate, K., Dewitt, J., Mckern, A., Rosmann, D., Karlen, D.L., Turnbull, R. 2009. Bean Leaf Beetle (Coleoptera: Chrysomelidae) Response to Soybean Variety and Organic-compliant Treatments in Iowa. Journal of Agricultural and Urban Entomology. 25:145-163.
Protocol for indicator scoring in the soil management assessment framework (SMAF) Reprint Icon -
Wienhold, B.J., Karlen, D.L., Andrews, S.S., Stott, D.E. 2009. Protocol for indicator scoring in the soil management assessment framework (SMAF). Renewable Agriculture and Food System. 24(4):260-266.
Use of the Soil Management Assessment Framework in Spatially Variable Fields -
Wienhold, B.J., Karlen, D.L., Andrews, S.S. 2009. Use of the Soil Management Assessment Framework in Spatially Variable Fields [abstract]. ASA-CSSA-SSSA Annual Meeting, November 1-5, 2009, Pittsburgh, Pennsylvania. 2009 CDROM. Abstract No. 51-5.
Distribution of energy in corn plants -
Cantrell, K.B., Novak, J.M., Frederick, J.R., Karlen, D.L., Watts, D.W. 2009. Distribution of energy in corn plants [abstract]. Proceedings of the American Society of Agronomy-Crop Science Society of America-Soil Science Society of America International Annual Meetings, November 1-5, 2009, Pittsburg, Pennsylvania.
Impact of Biochar Amendments on Soil Quality for a Typical Midwestern Agricultural Soil -
Laird, D.A., Fleming, P.D., Wang, B., Karlen, D.L. 2009. Impact of Biochar Amendments on Soil Quality for a Typical Midwestern Agricultural Soil. North Amer. Biochar Conf. 2009, Aug. 9-12, 2009, Boulder, CO. 28:50-38:11.
Crop Residues: The Rest of the Story -
Karlen, D.L., Lal, R., Follett, R.F., Kimble, J.M., Hatfield, J.L., Miranowski, J.M., Cambardella, C.A., Manale, A., Anex, R.P., Rice, C.W. 2009. Crop Residues: The Rest of the Story. Environmental Science and Technology. 43(21):8011-8015.
Future Testing Opportunities to Ensure Sustainability of the Biofuels Industry -
Karlen, D.L., Kerr, B.J. 2009. Future Testing Opportunities to Ensure Sustainability of the Biofuels Industry [abstract]. International Symposium on Soil and Plant Analysis. p. 18.
Strategies for Sustainable Corn Stover Feedstock Production -
Karlen, D.L., Birrell, S.J., Wendt, L.M., Hess, J.R. 2009. Strategies for Sustainable Corn Stover Feedstock Production. In: Proceedings of the International Soil Tillage Research Organization (ISTRO), June 15-19, 2009, Izmir, Turkey. p. 1-10.
Is No-Tillage Enough? A Field-Scale Watershed Assessment of Conservation Effects -
Karlen, D.L., Dinnes, D.L., Tomer, M.D., Meek, D.W., Cambardella, C.A., Moorman, T.B. 2009. Is No-Tillage Enough? A Field-Scale Watershed Assessment of Conservation Effects. Journal of Integrative Biosciences. 7(2):1-24.
Developing Field Studies to Measure Corn Residue Removal Effects on Soil Organic Matter - A Multi-Location Approach -
Varvel, G.E., Karlen, D.L., Baker, J.M., Johnson, J.M., Osborne, S.L., Novak, J.M. 2009. Developing Field Studies to Measure Corn Residue Removal Effects on Soil Organic Matter - A Multi-Location Approach [abstract]. ASA-CSSA-SSSA Annual Meeting, November 1-5, 2009, Pittsburgh, Pennsylvania. 2009 CDROM. Abstract No. 163-7.
Fluid Fertilizer’s Role in Sustaining Soils Used for Bio-fuel Feedstock Production -
Kovar, J.L., Karlen, D.L. 2009. Fluid Fertilizer’s Role in Sustaining Soils Used for Bio-fuel Feedstock Production. In: Fluid Fertilizer Foundation Symposium Proceedings. Fluid Fertilizer Forum, Feb. 15-17, 2009, Scottsdale, AZ 2009 CDROM.
Cover Crop and Liquid Manure Effects on Soil Quality Indicators in a Corn Silage System. Reprint Icon -
Jokela, W.E., Grabber, J.H., Karlen, D.L., Balser, T.C., Palmquist, D.E. 2009. Cover Crop and Liquid Manure Effects on Soil Quality Indicators in a Corn Silage System. Agronomy Journal. 101:727-737.
Soil management implications of producing biofuel feedstock -
Johnson, J.M., Archer, D.W., Karlen, D.L., Weyers, S.L., Wilhelm, W.W. 2011. Soil management implications of producing biofuel feedstock. In: Hatfield, J. and Sauer, T., editors. Soil Management: Building a Stable Base for Agriculture. Madison, WI: American Society of Agronomy Special Publication. American Society of Agronomy and Soil Science Society of America. p. 371-390.
Development of Sustainable Corn Stover Feedstock Supply Strategies -
Karlen, D.L., Birrell, S.J., Johnson, J.M., Wilhelm, W.W., Baker, J.M. 2008. Development of Sustainable Corn Stover Feedstock Supply Strategies [CD-ROM]. In: ASA-CSSA-SSSA Annual Meeting Abstracts, Oct. 5-9, 2008, Houston, TX.
Vertical distribution of corn stover dry mass -
Johnson, J.M., Wilhelm, W.W., Lightle, D., Karlen, D.L., Baker, J.M., Ochsner, T.E., Novak, J.M., Halvorson, A.D., Archer, D.W., Laird, D.A. 2008. Vertical distribution of corn stover dry mass [abstract][CD-ROM]. ASA-CSSA-SSSA Annual Meeting Abstracts. ASA-CSSA-SSSA Annual Meeting. Oct. 5-9, 2008, Houston, TX.
Three Analysis Examples for Time Series Data -
Meek, D.W., Laird, D.A., Dinnes, D.L., Jaynes, D.B., Cambardella, C.A., Colvin, T.S., Hatfield, J.L., Karlen, D.L. 2008. Three Analysis Examples for Time Series Data [CD-ROM]. In: ASA-CSSA-SSSA Annual Meeting Abstracts, Oct. 5-9, 2008, Houston, TX.
Will Sulfur Limit Bioenergy Feedstock Production? -
Kovar, J.L., Karlen, D.L. 2008. Will Sulfur Limit Bioenergy Feedstock Production? [CD-ROM]. In: ASA-CSSA-SSSA Annual Meeting Abstracts, Oct. 5-9, 2008, Houston, TX.
Challenges associated with sampling dynamic soil properties -
Zobeck, T.M., Wienhold, B.J., Karlen, D.L. 2008. Challenges associated with sampling dynamic soil properties. ASA-CSSA-SSSA Joint Annual Meeting. October 5-9, 2008. Houston, Texas. Paper No. 679-7.
Impact of Soil Biochar Applications on Nutrient Leaching -
Laird, D.A., Fleming, P.D., Wang, B., Horton, R., Karlen, D.L. 2008. Impact of Soil Biochar Applications on Nutrient Leaching [CD-ROM]. In: ASA-CSSA-SSSA Annual Meeting Abstracts, Oct. 5-9, 2008, Houston, TX.
Recent advances in soil quality assessment in the United States Reprint Icon -
Wienhold, B.J., Andrews, S.S., Kuykendall, H., Karlen, D.L. 2008. Recent advances in soil quality assessment in the United States. Journal of Indian Society of Soil Science. 56(3):237-246. Available: indianjournals.com/ijor.aspx?target=ijor:jisss&type=home
Recognizing and reducing environmental risks to improve the benefits of bioenergy -
Soil Biochar Applications Enhance Sustainability of Bioenergy Feedstock Production -
CEAP – A New Paradigm for Natural Resources Research -
Karlen, D.L. 2008. CEAP – A New Paradigm for Natural Resources Research. Journal of Soil and Water Conservation. 63:220A.
A Landscape Vision for Sustainable Bioenergy Feedstock Production -
Karlen, D.L., Birrell, S.J., Laird, D.A., Cruse, R.M. 2008. A Landscape Vision for Sustainable Bioenergy Feedstock Production [abstract]. In: C.J. Hapeman (ed.) Chemistry for and from Agriculture Program v. 75 and Abstracts of the American Chemical Society, 236th National Meeting and Exposition, August 178-21, 2008, Philadelphia, PA.
Sustainable corn-based bioenergy farming systems -
Singer, J.W., Laird, D.A., Cambardella, C.A., Karlen, D.L., Moore, K.J., Lamkey, K.R., Hatfield, J.L. 2008. Sustainable corn-based bioenergy farming systems. AGRO Division [abstract]. American Chemical Society National Meeting. No. 162.
Soil Quality Assessment: Past, Present, and Future -
Karlen, D.L., Andrews, S.S., Zobeck, T.M., Wienhold, B.J. 2008. Soil Quality Assessment: Past, Present, and Future. Electronic Journal of Integrative Biosciences. 6(1):3-14. Available: www.clt.astate.edu/electronicjournal.
Grass-Based Farming Systems: Soil Conservation and Environmental Quality -
Singer, J.W., Franzluebbers, A.J., Karlen, D.L. 2009. Grass-Based Farming Systems: Soil Conservation and Environmental Quality. In: Wedin, W.F., Fales, S., editors. Grasslands: Quietness and Strength for a New American Agriculture. Madison, WI: ASA. p. 121-136.
Balancing Feedstock Production and Soil Resource Protection -
Karlen, D.L., Baker, J.M., Wilhelm, W.W., Johnson, J.E. 2008. Balancing Feedstock Production and Soil Resource Protection. In: Proceedings of the Midwest Area Bioenergy Research Forum, July 18, 2008, Peoria, IL. 2008 CDROM.
Sustainable Corn Stover Harvest Strategies -
Karlen, D.L., Birrell, S.J., Hess, J.R., Wilhelm, W.W. 2008. Sustainable Corn Stover Harvest Strategies. In: Proceedings of the Midwest Area Bioenergy Research Forum, July 18, 2008, Peoria IL. 2008 CDROM.
Rainfed farming systems in the USA -
Franzluebbers, A.J., Steiner, J.L., Karlen, D.L., Griffin, T.S., Singer, J.W., Tanaka, D.L. 2011. Rainfed farming systems in the USA. In: Tow, P., Cooper, I., Partridge, I., Birch, C. editors. Rainfed Farming Systems. Heidelberg, Germany: Springer Publishing. p. 511-560.
Simulated Corn Stover Removal Effects on Soil Organic Carbon and Nitrogen Dynamics -
Ma, L., Malone, R.W., Ahuja, L.R., Karlen, D.L., Saseendran, S.A. 2009. Simulated Corn Stover Removal Effects on Soil Organic Carbon and Nitrogen Dynamics. American Society of Agronomy Meetings, Houston, TX, October 5, 2009.
Sustainability Indicators: A Scientific Assessment -
Karlen, D.L. 2008. Book Review of Sustainability Indicators: A Scientific Assessment. Journal of Environmental Quality. 37:1663.
Comparison of two soil quality indexes to evaluate cropping systems in northern Colorado -
Zobeck, T.M., Halvorson, A.D., Wienhold, B.J., Acosta Martinez, V., Karlen, D.L. 2008. Comparison of two soil quality indexes to evaluate cropping systems in northern Colorado. Journal of Soil and Water Conservation. 63(5):329-338.
A Preliminary Watershed Scale Soil Quality Assessment in North Central Iowa USA -
Karlen, D.L., Tomer, M.D., Neppel, J., Cambardella, C.A. 2008. A Preliminary Watershed Scale Soil Quality Assessment in North Central Iowa USA. Soil & Tillage Research. 99:291-299.
Fluid Fertilizer's Role in Sustainng Soils Used for Bio-Fuels Production -
Kovar, J.L., Karlen, D.L. 2008. Fluid Fertilizer's Role in Sustainng Soils Used for Bio-Fuels Production. In: Fluid Fertilizer Foundation Symposium Proceedings. Fluid Fertilizer Forum, February 17-19, 2008, Scottsdale, AZ. 2008 CDROM.
Agriculture in the U.S. Corn Belt: Past, Present, and Future -
Karlen, D.L., Singer, J.W., Gibson, L.R. 2007. Agriculture in the U.S. Corn Belt: Past, Present, and Future [CD-ROM]. In: ASA-CSSA-SSSA Annual Meeting Abstracts, Nov. 4-8, 2007, New Orleans, LA.
Will Sulfur Limit Bio-fuel Corn Production? -
Kovar, J.L., Karlen, D.L. 2007. Will Sulfur Limit Bio-fuel Corn Production? [CD-ROM]. In: ASA-CSSA-SSSA Annual Meeting Abstracts, Nov. 4-8, 2007, New Orleans, LA.
Evaluation of Organic Pest Management Treatments for Bean Leaf Beetle in Soybean in Iowa -
Mckern, A., Rosmann, M., Delate, K., Karlen, D.L. 2007. Evaluation of Organic Pest Management Treatments for Bean Leaf Beetle in Soybean in Iowa [CD-ROM]. In: ASA-CSSA-SSSA Annual Meeting Abstracts, Nov. 4-8, 2007, New Orleans, LA.
Lignocellulosic Biomass Quality Changes in Relation to Available Feedstock Tonnage -
Radtke, C., Karlen, D.L., Birrell, S., Petzke, L., Pryfogle, P.A., Hess, J.R. 2007. Lignocellulosic Biomass Quality Changes in Relation to Available Feedstock Tonnage [abstract]. In: Abstracts of the American Institute of Chemical Engineers Annual Meeting, Nov. 4-9, 2007, Salt Lake City, UT CDROM.
Balancing Bioenergy Opportunities on Your Natural Resources Base -
Karlen, D.L. 2007. Balancing Bioenergy Opportunities on Your Natural Resources Base [CD-ROM]. Indiana Crop Advisors Conference Meeting Proceedings. Dec. 18-19, 2007. Indianapolis, IN.
Soil Management Assessment Framework: Developing indicator scoring curves for soil enzymes -
Stott, D.E., Wienhold, B.J., Karlen, D.L., Andrews, S.S. 2007. Soil Management Assessment Framework: Developing indicator scoring curves for soil enzymes. Soil Science Society of America Annual Meeting, November 4-8, 2007, New Orleans, Louisiana. 2007 CDROM.
Soil Fertility Management Strategies -- Philosophies, Crop Response and Costs -
Exner, R., Delate, K., Karlen, D.L. 2007. Soil Fertility Management Strategies -- Philosophies, Crop Response and Costs. Iowa State University - University Extension. p. 2-10.
Cover Crop and Manure Effects on Soil Properties in a Corn Silage System -
Jokela, W.E., Grabber, J.H., Karlen, D.L., Balser, T.C. 2007. Cover Crop and Manure Effects on Soil Properties in a Corn Silage System. In: American Society of Agronomy Abstracts. American Society of Agronomy Annual Meeting, November 4-8, 2007, New Orleans, Louisiana. 2007 CDROM.
Balancing crop biomass for bioenergy and conservation -
Karlen, D.L., Johnson, J.M., Wilhelm, W.W., Follett, R.F. 2007. Balancing crop biomass for bioenergy and conservation [abstract]. Soil and Water Conservation Society, p. 64.
Corn Stover to Sustain Organic Carbon Further Constrains Biomass Supply Reprint Icon -
Wilhelm, W.W., Johnson, J.M., Karlen, D.L., Lightle, D. 2007. Corn Stover to Sustain Organic Carbon Further Constrains Biomass Supply. Agronomy Journal. 99:1665-1667.
Simulated N Management Effects on Corn Yield and Tile-Drainage Nitrate Loss -
Malone, R.W., Ma, L., Heilman, P., Karlen, D.L., Kanwar, R.S., Hatfield, J.L. 2007. Simulated N Management Effects on Corn Yield and Tile-Drainage Nitrate Loss. Geoderma. 140:272-283.
EMPIRICAL ANALYSIS AND PREDICTION OF NITRATE LOADING AND CROP YIELD FOR A CORN-SOYBEAN ROTATIONS -
Malone, R.W., Ma, L., Karlen, D.L., Meade, T.G., Meek, D.W., Heilman, P., Kanwar, R.S., Hatfield, J.L. 2007. Empirical analysis and prediction of nitrate loading and crop yield for a corn-soybean rotations. Geoderma. 140:223-234.
Evaluating and predicting agricultural management effects under tile-drainage using modified APSIM -
Malone, R.W., Huth, N., Carberry, P.S., Ma, L., Kaspar, T.C., Karlen, D.L., Meade, T.G., Kanwar, R.S., Heilman, P. 2007. Evaluating and predicting agricultural management effects under tile-drainage using modified APSIM. Geoderma. 140:310-322.
Soil Profile Nitrate Response to Nitrogen Fertilization of Winter Triticale -
Nance, C.D., Gibson, L.R., Karlen, D.L. 2007. Soil Profile Nitrate Response to Nitrogen Fertilization of Winter Triticale. Soil Science Society of America Journal. 71:1343-1351.
Soil Quality Assessment -- A Value Added Opportunity for Soil Testing Laboratories -
Karlen, D.L., Zobeck, T.M., Wienhold, B.J. 2007. Soil Quality Assessment -- A Value Added Opportunity for Soil Testing Laboratories. In: Proceedings of the Eighteenth Soil/Plant Analysts Workshop, February 27-28, 2007, Bettendorf, Iowa. North Central Extension and Research Activity (NCERA-13), Michigan State University, East Lansing, Michigan 48824-1325. p.63-69.
Producer-Researcher Interactions on On-Farm Research: A Case Study on Developing a Certified Organic Research Site -
Karlen, D.L., Cambardella, C.A., Bull, C.T., Chase, C.A., Gibson, L.R., Delate, K. 2007. Producer-Researcher Interactions on On-Farm Research: A Case Study on Developing a Certified Organic Research Site. Agronomy Journal. 99:779-790.
Crop Residue Removal Effects on Production Costs and Soil Quality -
Karlen, D.L., Birrell, S.J., Radtke, C.J., Wilhelm, W.W. 2006. Crop Residue Removal Effects on Production Costs and Soil Quality. In: ASA-CSSA-SSSA Annual Meeting Abstracts. ASA-CSSA-SSSA Annual Meeting, Indianapolis, Indiana, November 12-16, 2006. 2006 CD-ROM.
RZWQM Simulation Of Long-Term Crop Production, Water And Nitrogen Balances In Northeast Iowa -
Ma, L., Malone, R.W., Heilman, P., Karlen, D.L., Kanwar, R., Cambardella, C.A., Ahuja, L.R. 2007. RZWQM simulation of long-term crop production, water and nitrogen balances in northeast Iowa. Geoderma 140(3):247-259. doi: 10.1016/j.geoderma.2007.04.009.
SIMULATING MANAGEMENT EFFECTS ON CROP PRODUCTION, TILE DRAINAGE, AND WATER QUALITY USING RZWQM-DSSAT -
Anapalli, S., Ma, L., Malone, R.W., Heilman, P., Ahuja, L.R., Kanwar, R., Karlen, D.L., Hoogenboom, G. 2007. Simulating management effects on crop production, tile drainage, and water quality using RZWQM-DSSAT. Geoderma 140:3 (2007)297-309. Published on-line 5/23/2007. doi:10.1016/j.geoderma.2007.04.013.
Response to "Comments on 'Need for a Soil-based Approach in managing Nitrogen Fertilizers for Profitable Corn Production' and 'Soil Organic Nitrogen Enrichment Following Soybean in an Iowa Corn-Soybean Rotation'" -
Jaynes, D.B., Olk, D.C., Colvin, T., Kaspar, T.C., Karlen, D.L. 2007. Response to "Comments on 'Need for a Soil-based Approach in managing Nitrogen Fertilizers for Profitable Corn Production' and 'Soil Organic Nitrogen Enrichment Following Soybean in an Iowa Corn-Soybean Rotation'". Soil Science Society of America Journal. 71(1):255.
Sustainable Production of Crop Residue as a Cellulosic Ethanol Feedstock: REAP – Renewable Energy Assessment Project -
Jaradat, A.A., Johnson, J.M., Karlen, D.L., Wilhelm, W.W. 2006. Sustainable Production of Crop Residue as a Cellulosic Ethanol Feedstock: REAP – Renewable Energy Assessment Project sponsored by USDA & DOE. Oct 10-12 2006, St Louis, MO. Meeting Abstract.
Winter triticale response to nitrogen fertilization when grown after corn or soybean -
Gibson, L.R., Nance, C.D., Karlen, D.L. 2007. Winter triticale response to nitrogen fertilization when grown after corn or soybean. Agronomy Journal. 99:49-58.
ASSESSING SOIL QUALITY AT A WATERSHED SCALE IN NORTH CENTRAL IOWA, USA -
Karlen, D.L., Tomer, M.D., Neppel, J., Cambardella, C.A. 2006. Assessing soil quality at a watershed scale in North Central Iowa, USA. 17th International Soil Tillage Research Organization (ISTRO) Proceedings. p.1255-1267.
Crop Residue as Feedstock for the New Bioeconomy: Opportunities and Roadblocks -
Wilhelm, W.W., Varvel, G.E., Karlen, D.L., Johnson, J.M., Baker, J. 2006. Crop Residue as Feedstock for the New Bioeconomy: Opportunities and Roadblocks. In Annual meeting abstract [CD-ROM]. ASA, CSSA, SSSA. Madison, WI.
ENGINEERING, NUTRIENT REMOVAL, AND FEEDSTOCK CONVERSION EVALUATIONS OF FOUR CORN STOVER HARVEST SCENARIOS -
Hoskinson, R., Karlen, D.L., Birrell, S.J., Radtke, C.W., Wilhelm, W.W. 2006. Engineering, nutrient removal, and feedstock conversion evaluations of four corn stover harvest scenarios. Biomass and Bioenergy. 31(2-3): 126-136. Available: http://www.sciencedirect.com/science?
EMPIRICAL MODELING OF NITRATE LOADING AND CROP YIELD FOR CORN-SOYBEAN ROTATIONS IN IOWA -
APPLICATION OF THE ANNAGNPS MODEL TO THE WALNUT CREEK, IA CEAP BENCHMARK WATERSHED -
Dinnes, D.L., Jaynes, D.B., Karlen, D.L., Bingner, R.L., Yuan, Y. 2006. Application of the ANNAGNPS model to the Walnut Creek, IA CEAP benchmark watershed. 2006 USDA-ARS CEAP Watershed Assessment Study Annual Meeting. Available: www.nrcs.usda.gov/TECHNICAL/nri/ceap/watersheds/2006meeting.html.
IS POTASSIUM LIMITING NO-TILL CORN YIELDS? -
Karlen, D.L., Kovar, J.L. 2006. Is potassium limiting no-till corn yields? Proceedings of Great Plains Soil Fertility Conference. 11:206-211.
NO-TILL CORN RESPONSE TO BANDED K ON DES MOINES LOBE SOILS -
Karlen, D.L., Kovar, J.L. 2006. No-till corn response to banded K on Des Moines lobe soils. In: Fluid Fertilizer Foundation Symposium Proceedings. Fluid Feritlizer Forum 2006, February 12-14, 2006, Scottsdale, AZ. 2006 CD-ROM
SOIL QUALITY: INDICES AND APPRAISAL. PP. 67-72. PROC. INTERNATIONAL CONFERENCE ON SOIL, WATER, AND ENVIRONMENTAL QUALITY – ISSUES AND STRATEGIES. NEW DELHI, INDIA. -
Wienhold, B.J., Andrews, S.S., Karlen, D.L. 2006. Soil quality: indices and appraisal. pp. 67-72. Proc. International Conference on Soil, Water, and Environmental Quality – issues and strategies. New Delhi, India.. International Symposium on Ecological Indicators and Indices.
PLANTING DATE EFFECTS ON WINTER TRITICALE GRAIN YIELD AND YIELD COMMPONENTS -
Schwarte, A.J., Gibson, L.R., Karlen, D.L., Liebman, M., Jannink, J. 2006. Planting date effects on winter triticale grain yield and yield commponents. Crop Science. 46:1218-1224.
CROP ROTATION EFFECTS ON SOIL QUALITY AT THREE NORTHERN CORN/SOYBEAN BELT LOCATIONS -
Karlen, D.L., Hurley, E.G., Andrews, S.S., Cambardella, C.A., Meek, D.W., Duffy, M.D., Mallarino, A.P. 2006. Crop rotation effects on soil quality at three northern corn/soybean belt locations. Agronomy Journal. 98:484-495.
THE SOIL RESOURCE MANAGEMENT NATIONAL PROGRAM -- CHALLENGES AND OPPORTUNITIES -
Karlen, D.L., Franzluebbers, A.J., Busscher, W.J., Baumhardt, R.L., Wright, R.J., Jawson, M.D. 2005. The soil resource management national program -- challenges and opportunities [CD-ROM]. In: ASA-CSSA-SSSA Annual Meeting Abstracts, Nov. 6-10, 2005, Salt Lake City, UT.
SUSTAINING SOIL RESOURCES WHILE MANAGING NUTRIENTS -
Jaynes, D.B., Karlen, D.L. 2005. Sustaining soil resources while managing nutrients. In: Final Report: Gulf Hypoxia and Local Water Quality Concerns Workshop, September 26-28, 2005, Ames, Iowa. p. 149-158.
IDENTIFYING SPATIAL PATTERNS OF EROSION FOR USE IN PRECISION CONSERVATION -
Schumacher, J.A., Venteris, E.R., Mccarty, G.W., Ritchie, J.C., Kaspar, T.C., Colvin, T.S., Jaynes, D.B., Karlen, D.L., Fenton, T.E., Schumacher, T.E., Lindstrom, M.J. 2005. Identifying spatial patterns of erosion for use in precision conservation. Journal of Soil and Water Conservation. 60(6):355-362.
IS K THE CINDERELLA NUTRIENT FOR REDUCED-TILL SYSTEMS? -
Karlen, D.L., Kovar, J.L. 2005. Is K the Cinderella nutrient for reduced-till systems? Fluid Journal. 13(4):8-11.
ASSESSING SOIL FERTILITY IN THE SOUTH FORK WATERSHED OF THE IOWA RIVER -
Nepple, J., Tomer, M.D., Karlen, D.L. 2005. Assessing soil fertility in the south fork watershed of the Iowa river. Soil Conservation and Water Quality Symposium Proceedings. Available: http://www.swcs.org/en/swcs_international_conferences/2005_annual_conference/index.cfm?nodeID=7456&audienceID=1
SOIL AMINO ACID ENRICHMENT FOLLOWING SOYBEAN IN AN IOWA CORN-SOYBEAN ROTATION 1753 -
Martens, D.A., Jaynes, D.B., Colvin, T.S., Kaspar, T.C., Karlen, D.L. 2006. Soil amino acid enrichment following soybean in an Iowa corn-soybean rotation. Soil Science Society of America Journal. 70:382-392.
PROFIT AND YIELD OF TILLAGE IN COTTON PRODUCTION SYSTEMS -
Buman, R.A., Alessi, B.A., Bradley, J.F., Hatfield, J.L., Karlen, D.L. 2005. Profit and yield of tillage in cotton production systems. Journal of Soil and Water Conservation Society. 60(5):235-242.
PLANTING DATE EFFECTS ON WINTER TRITICALE DRY MATTER AND NITROGEN ACCUMULATION -
Schwarte, A.J., Gibson, L.R., Karlen, D.L., Liebman, M., Jannink, J. 2005. Planting date effects on winter triticale dry matter and nitrogen accumulation. Agronomy Journal. 97:1333-1341.
IS K THE CINDERELLA NUTRIENT FOR REDUCED TILLAGE SYSTEMS? -
Karlen, D.L., Kovar, J.L. 2005. Is K the Cinderella nutrient for reduced tillage systems? [CD-ROM] In: Fluid Fertilizer Foundation Symposium Proceedings, Feb. 13-15, 2005, Scottsdale, Arizona.
CORN RESPONSE TO LATE-SPRING NITROGEN MANAGEMENT IN THE WALNUT CREEK WATERSHED -
Karlen, D.L., Dinnes, D.L., Jaynes, D.B., Hurburgh, C.R., Cambardella, C.A., Colvin, T.S., Rippke, G.R. 2005. Corn response to late-spring nitrogen management in the Walnut Creek watershed. Agronomy Journal. 97:1054-1061.
EFFECTS OF LIQUID SWINE MANURE APPLICATIONS ON NO3-N LEACHING LOSSES TO SUBSURFACE DRAINAGE WATER FROM LOAMY SOILS IN IOWA -
Bakhsh, A., Kanwar, R.S., Karlen, D.L. 2005. Effects of liquid swine manure applications on NO3-N leaching losses to subsurface drainage water from loamy soils in Iowa. Agriculture Ecosystems and the Environment. 105:118-128.
EFFECTS OF GRAZING CORN STALKS ON SOIL PHYSICAL PROPERTIES -
Karlen, D.L., Clark, J., Russell, J., Busby, D., Peterson, B., Singleton, P. 2005. Effects of grazing corn stalks on soil physical properties. In: Proceedings of the Heart of American Grazing Conference, January 19-20, 2005, Wilmington, OH.
SOIL, WHEAT, AND SORGHUM RESPONSE TO TILLAGE UNDER RHIZOTRON CONDITIONS -
Karlen, D.L., Jaynes, D.B., Pellack, L.S., Heikens, K.E. 2004. Soil, Wheat, and Sorghum Response to Tillage Under Rhizotron Conditions [CD-ROM]. ASA-CSSA-SSSA Annual Meeting Abstracts. Madison, Wisconsin.
IDENTIFYING SPATIAL PATTERNS OF EROSION FOR USE IN PRECISION CONSERVATION -
Schumacher, J.A., Venteris, E.R., Mccarty, G.W., Ritchie, J.C., Kaspar, T.C., Colvin, T.S., Jaynes, D.B., Karlen, D.L., Fenton, T.E., Schumacher, T.E., Lindstrom, M.J. 2004. Identifying Spatial Patterns of Erosion for Use in Precision Conservation [CD-ROM]. ASA-CSSA-SSSA Annual Meeting Abstracts. Madison, Wisconsin. p. 4780.
PROFIT, YIELD, AND SOIL QUALITY EFFECTS OF TILLAGE IN CORN / SOYBEAN ROTATIONS -
Buman, R.A., Alessi, B.A., Hatfield, J.L., Karlen, D.L. 2004. Profit, yield, and soil quality effects of tillage in corn / soybean rotations. Journal of Soil and Water Conservation. 59:260-270.
IMPLEMENTING THE SMAF FOR ENVIRONMENTAL QUALITY POLICY: WATER QUALITY IMPLICATIONS IN IOWA -
Hatfield, J.L., Karlen, D.L. 2004. Implementing the SMAF for environmental quality policy: water quality implications in Iowa [abstract]. Soil and Water Conservation Society. Available: http://www.swcs.org/t_what2004confabstractsCONTACTS.htm.
QUANTIFICATION OF TILLAGE AND LANDSCAPE EFFECTS ON SOIL CARBON IN SMALL IOWA WATERSHEDS -
Moorman, T.B., Cambardella, C.A., James, D.E., Karlen, D.L., Kramer, L.A. 2004. Quantification of tillage and landscape effects on soil carbon in small Iowa watersheds. Soil & Tillage Research. 78(2):225-236.
WATERSHED-SCALE ASSESSMENT OF SOIL QUALITY IN THE LOESS HILLS OF SOUTHWEST IOWA -
Cambardella, C.A., Moorman, T.B., Andrews, S.S., Karlen, D.L. 2004. Watershed-scale assessment of soil quality in the loess hills of southwest Iowa. Soil & Tillage Research. 78(2):237-247.
FORAGES FOR CONSERVATION AND IMPROVED SOIL QUALITY -
Karlen, D.L., Lemunyon, J.L., Singer, J.W. 2006. Forages for Conservation and Improved Soil Quality. In: Barnes, R.F., Nelson, C.J., Moore, K.J., Collins, M., editors. Sixth Edition of Forages, Volume II The Science of Grassland Agriculture. Ames, IA: Blackwell Publishing, Inc. p-149-166.
LIQUID SWINE MANURE MANAGEMENT CHALLENGES ON TILE-DRAINED SOILS -
Karlen, D.L. 2004. Liquid swine manure management challenges on tile-drained soils. Applied Engineering in Agriculture. 20(5):693-699.
THE SOIL MANAGEMENT ASSESSMENT FRAMEWORK: A QUANTITATIVE SOIL QUALITY EVALUATION METHOD WITH CASE STUDIES -
Andrews, S.S., Karlen, D.L., Cambardella, C.A. 2004. The soil management assessment framework: a quantitative soil quality evaluation method with case studies. Soil Science Society of America Journal. 68:1945-1962.
SOIL DEGRADATION IN THE UNITED STATES: EXTENT, SEVERITY, AND TRENDS (A BOOK REVIEW) -
Karlen, D.L. 2004. Soil Degradation in the United States: Extent, Severity, and Trends (A Book Review). Soil Science. 169(8):609-611.
CORN-SOYBEAN AND ALTERNATIVE CROPPING SYSTEMS EFFECTS ON NO3-N LEACHING LOSSES IN SUBSURFACE DRAINAGE WATER -
Kanwar, R.S., Cruse, R., Ghaffarzadeh, M., Bakhsh, A., Karlen, D.L., Bailey, T. 2005. Corn-soybean and alternative cropping systems effects on NO3-N leaching losses in subsurface drainage water. Applied Engineering in Agriculture. 21(2):181-188.
SOIL SURFACE PROPERTY AND SOYBEAN YIELD RESPONSE TO CORN STOVER GRAZING -
Clark, J.T., Russell, J.R., Karlen, D.L., Singleton, P.L., Busby, W.D., Peterson, B.C. 2004. Corn Stover Grazing Effects on Soil Physical Properties and Subsequent Soybean Yield. Agronomy Journal. 96(5):1364-1371.
ORGANIC SOYBEAN PRODUCTION: CHALLENGES AND PERSPECTIVES OF AN INCREASING TREND -
Karlen, D.L., Delate, K., Turnbull, R., Boes, J. 2004. Organic soybean production: challenges and perspectives of an increasing trend. Soybean Research World Conference Proceedings. p. 319-327.
THE CONSERVATION AND IMPROVEMEMT OF SLOPING LAND, VOL. 1: PRACTICAL UNDERSTANDING (A BOOK REVIEW) -
Karlen, D.L. 2004. The Conservation and Improvememt of Sloping Land, Vol. 1: Practical Understanding (a book review). Journal of Environmental Quality. 33:1577-1578.
RELATIONSHIP OF CORN AND SOYBEAN YIELD TO SOIL AND TERRAIN PROPERTIES -
Kaspar, T.C., Pulido, D.J., Fenton, T.E., Colvin, T.S., Karlen, D.L., Jaynes, D.B., Meek, D.W. 2004. Relationship of corn and soybean yield to soil and terrain properties. Agronomy Journal. 96(3):700-709.
IMPLEMENT AND SOIL CONDITION EFFECTS ON TILLAGE-INDUCED EROSION -
Marques Da Silva, J.R., Soares, J.M., Karlen, D.L. 2004. Implement and soil condition effects on tillage-induced erosion. Soil & Tillage Research. 78:207-216.
SOIL QUALITY AS AN INDICATOR OF SUSTAINABLE TILLAGE PRACTICES -
Karlen, D.L. 2004. Soil quality as an indicator of sustainable tillage practices. Soil & Tillage Research. 78:129-130.
APPLICATIONS AND IMPLICATIONS OF THE SOIL MANAGEMENT ASSESSMENT FRAMEWORK -
ANDREWS, S.S., KARLEN, D.L., NORFLEET, L., CAMBARDELLA, C.A. APPLICATIONS AND IMPLICATIONS OF THE SOIL MANAGEMENT ASSESSMENT FRAMEWORK. ASA-CSSA-SSSA PROCEEDINGS. 2003. CD-ROM. MADISON, WI.
SIMULATING LATE SPRING NITROGEN TEST EFFECTS ON N LEACHING AND CROP PRODUCTION -
MALONE, R.W., MEADE, T.G., MA, L., ANAPALLI, S.A., KANWAR, R.S., KARLEN, D.L., HATFIELD, J.L., AHUJA, L.R. SIMULATING LATE SPRING NITROGEN TEST EFFECTS ON N LEACHING AND CROP PRODUCTION. CD-ROM. MADISON, WI. AMERICAN SOCIETY OF AGRONOMY MEETINGS. 2003.
SIMULATING SWINE MANURE EFFECTS ON N LEACHING AND CROP PRODUCTION -
MA, L., MALONE, R.W., ANAPALLI, S.A., MEADE, T.G., KANWAR, R.S., KARLEN, D.L., HATFIELD, J.L., AHUJA, L.R. SIMULATING SWINE MANURE EFFECTS ON N LEACHING AND CROP PRODUCTION. CD-ROM. MADISON, WI. AMERICAN SOCIETY OF AGRONOMY MEETINGS. 2003.
SOIL QUALITY INDICATOR RESPONSE TO CORN STALK GRAZING -
CLARK, J.T., KARLEN, D.L., RUSSELL, J.R. SOIL QUALITY INDICATOR RESPONSE TO CORN STALK GRAZING. ASA-CSSA-SSSA ANNUAL MEETING ABSTRACTS. 2003. CD-ROM. MADISON, WI.
SOIL FERTILITY PARADIGMS -- CATION RATIO AND SUFFICIENCY -- COMPARED ON-FARM AND ON-STATION -
EXNER, D.N., DELATE, K., KARLEN, D.L. SOIL FERTILITY PARADIGMS -- CATION RATIO AND SUFFICIENCY -- COMPARED ON-FARM AND ON-STATION. ASA-CSSA-SSSA ANNUAL MEETING ABSTRACTS. 2003. CD-ROM. MADISON, WI.
USING THE LATE SPRING NITRATE TEST TO REDUCE NITRATE LOSS WITHIN A WATERSHED -
JAYNES, D.B., DINNES, D.L., MEEK, D.W., KARLEN, D.L., CAMBARDELLA, C.A., COLVIN, T.S. USING THE LATE SPRING NITRATE TEST TO REDUCE NITRATE LOSS WITHIN A WATERSHED. JOURNAL OF ENVIRONMENTAL QUALITY. 2004. V. 33(2). P. 656-668.
A LOOK BACK AT A LONG TERM TILLAGE EXPERIMENT AND A LOOK FORWARD AT THE POTENTIAL FOR SITE SPECIFIC TILLAGE -
COLVIN, T.S., TAPELA, M., MEEK, D.W., COOK, J.D., BAKER, J., CRUSE, R., KARLEN, D.L. A LOOK BACK AT A LONG TERM TILLAGE EXPERIMENT AND A LOOK FORWARD AT THE POTENTIAL FOR SITE SPECIFIC TILLAGE. TILLAGE CONFERENCE PROCEEDINGS. 2003. CD-ROM. WOOSTER, OH.
TILTH -
Karlen, D.L. 2004. Tilth. In: Hillel, D., editor. Encyclopedia of Soils in the Environment. Vol. 3. p. 330-336.
PRODUCTIVITY OF SOILS -
Karlen, D.L. 2004. Productivity of soils. In: Hillel, D., editor. Encyclopedia of Soils in the Environment. Vol. 4. p. 168-174.
SOIL QUALITY -- HUMANKIND'S FOUNDATION FOR SURVIVAL -
KARLEN, D.L., DORAN, J.W., ANDREWS, S.S., WIENHOLD, B.J. SOIL QUALITY -- HUMANKIND'S FOUNDATION FOR SURVIVAL. JOURNAL OF SOIL AND WATER CONSERVATION. 2003. V. 58(4). P. 171-179.
GROWERS' PERCEPTIONS AND ACCEPTANCE OF SOIL QUALITY INDICES -
ANDREWS,S.S., FLORA,C.B., MITCHELL,J.P., KARLEN,D.L., GROWERS' PERCEPTIONS AND ACCEPTANCE OF SOIL QUALITY INDICES, GEODERMA, 2003. V.114. P. 187-213.
SOIL QUALITY: WHY AND HOW? -
KARLEN,D.L., DITZLER,C.A., ANDREWS,S.S., SOIL QUALITY: WHY AND HOW?, GEODERMA, 2003. Vol. 114, Issues 3-4, p. 145-156.
PROFITABILITY OF VARIOUS CORN, SOYBEAN, WHEAT, AND ALFALFA CROPPING SYSTEMS -
SINGER, J.W., CHASE, C.A., KARLEN, D.L. PROFITABILITY OF VARIOUS CORN, SOYBEAN, WHEAT, AND ALFALFA CROPPING SYSTEMS. CROP MANAGEMENT at www.cropmanagement.org. 2003. Available from: www.cropmanagement.org/doi:10.1094/CM-2003-0130-01-RS.
SOIL QUALITY, FERTILITY, AND HEALTH - HISTORICAL CONTEXT, STATUS, AND PERSPECTIVES -
KARLEN, D.L., WIENHOLD, B.J., ANDREWS, S.S. SOIL QUALITY, FERTILITY, AND HEALTH - HISTORICAL CONTEXT, STATUS, AND PERSPECTIVES. SCHJONNING, S., ELMHOLT, S., CHRISTENSEN, B.T., EDITORS. CAB INTERNATIONAL, CAMBRIDGE, MA. MANAGING SOIL QUALITY: CHALLENGES IN MODERN AGRICULTURE; CHAPTER 2. 2004. P. 17-33.
THE NEED FOR AND ATTEMPTS AT RELATING SOIL QUALITY ASSESSMENT TO ECONOMIC RETURN -
ANDREWS, S.S., KARLEN, D.L., FLORA, C.B., NISSEN, T.M., MITCHELL, J.P. THE NEED FOR AND ATTEMPTS AT RELATING SOIL QUALITY ASSESSMENT TO ECONOMIC RETURN. AMERICAN SOCIETY OF AGRONOMY MEETINGS. 2002. CD-ROM. MADISON, WI.
CORN RESPONSE TO NITROGEN ACROSS LANDSCAPE POSITIONS -
KASPAR, T.C., COLVIN, T.S., JAYNES, D.B., KARLEN, D.L. CORN RESPONSE TO NITROGEN ACROSS LANDSCAPE POSITIONS. ASA-CSSA-SSSA ANNUAL MEETING ABSTRACTS. 2002. CD-ROM. MADISON, WI.
TRANSITION CHANGES ASSOCIATED WITH IMPLEMENTING ORGANIC AGRICULTURE RESEARCH -
KARLEN, D.L., DELATE, K., GIBSON, L.R., BRUMMER, E.C. TRANSITION CHANGES ASSOCIATED WITH IMPLEMENTING ORGANIC AGRICULTURE RESEARCH. AMERICAN SOCIETY OF AGRONOMY MEETINGS. 2002. CD-ROM. MADISON, WI.
DOES SOIL QUALITY SHOW AN ECONOMIC BENEFIT FOR LONG-TERM CROP ROTATION? -
KARLEN, D.L., HURLEY, E.G., ANDREWS, S.S., DUFFY, M.D., MALLARINO, A.P., CAMBARDELLA, C.A. DOES SOIL QUALITY SHOW AN ECONOMIC BENEFIT FOR LONG-TERM CROP ROTATION?. AMERICAN SOCIETY OF AGRONOMY MEETINGS. 2002. CD-ROM. MADISON, WI.
LINKING SOIL QUALITY TO ECONOMICS USING MANAGEMENT PRACTICE INDICATORS -
CAMBARDELLA, C.A., KARLEN, D.L., ANDREWS, S.S., DUFFY, M.D. LINKING SOIL QUALITY TO ECONOMICS USING MANAGEMENT PRACTICE INDICATORS. ASA-CSSA-SSSA PROCEEDINGS. 2002. CD-ROM. MADISON, WI.
RAIN-FED MAIZE-SOYBEAN ROTATIONS OF NORTH AMERICA -
Karlen, D.L. 2004. Rain-fed maize-soybean rotations of North America. Dekker Encyclopedia of Plant and Crop Science. p. 358-362.
TRANSITION STRATEGIES FOR POST-CRP CERTIFIED ORGANIC GRAIN PRODUCTION -
DELATE, K., CAMBARDELLA, C.A., KARLEN, D.L. TRANSITION STRATEGIES FOR POST-CRP CERTIFIED ORGANIC GRAIN PRODUCTION. CROP MANAGEMENT at www.cropmanagement.org. 2002. Available from: www.cropmanagement.org.
BULK DENSITY AS A SOIL QUALITY INDICATOR DURING CONVERSION TO NO-TILLAGE -
Logsdon, S.D., Karlen, D.L. 2004. Bulk density as a soil quality indicator during conversion to no-tillage. Soil & Tillage Research. 78:143-149.
CROPPING SYSTEM EFFECTS ON NO3-N LOSS WITH SUBSURFACE DRAINAGE WATER -
BAKHSH, A., KANWAR, R.S., BAILEY, T.B., CAMBARDELLA, C.A., KARLEN, D.L., COLVIN, T.S. CROPPING SYSTEM EFFECTS ON NO3-N LOSS WITH SUBSURFACE DRAINAGE WATER. TRANSACTIONS OF THE AMERICAN SOCIETY OF AGRICULTURAL ENGINEERS. 2002. V. 45(6). P. 1789-1797.
SPATIAL AND TEMPORAL VARIABILITY IN CORN YIELD GROWN UNDER DIFFERENT TILLAGE SYSTEMS -
TAPELA, M., COLVIN, T.S., KARLEN, D.L. SPATIAL AND TEMPORAL VARIABILITY IN CORN YIELD GROWN UNDER DIFFERENT TILLAGE SYSTEMS. PRECISION AGRICULTURE. 2002. CD-ROM. Madison, WI.
SPATIAL AND TEMPORAL VARIABILITY IN CORN YIELD GROWN UNDER DIFFERENT TILLAGE SYSTEMS -
TAPELA, M., COLVIN, T.S., KARLEN, D.L. SPATIAL AND TEMPORAL VARIABILITY IN CORN YIELD GROWN UNDER DIFFERENT TILLAGE SYSTEMS. INTERNATIONAL CONFERENCE ON PRECISION AGRICULTURE ABSTRACTS & PROCEEDINGS. 2002. CD-ROM. MADISON, WI.
SURFACE WATER QUALITY RESPONSE TO A NITROGEN FERTILIZER BMP AT THE WATERSHED SCALE -
DINNES, D.L., JAYNES, D.B., KARLEN, D.L., MEEK, D.W., CAMBARDELLA, C.A., COLVIN, T.S., HATFIELD, J.L. SURFACE WATER QUALITY RESPONSE TO A NITROGEN FERTILIZER BMP AT THE WATERSHED SCALE. SOIL AND WATER CONSERVATION SOCIETY. 2002. V. 57(5). P. 308.
SEWAGE SLUDGE AND SOIL SUSTAINABILITY -
JAWSON, M.D., KARLEN, D.L. SEWAGE SLUDGE AND SOIL SUSTAINABILITY. MEETING ABSTRACT. 2002. P. 7-15.
RELATIONSHIP BETWEEN SIX YEARS OF CORN YIELDS AND TERRAIN ATTRIBUTES -
KASPAR, T.C., COLVIN, T.S., JAYNES, D.B., KARLEN, D.L., JAMES, D.E., MEEK, D.W., PULIDO, D., BUTLER, H. RELATIONSHIP BETWEEN SIX YEARS OF CORN YIELDS AND TERRAIN ATTRIBUTES. PRECISION AGRICULTURE. 2003. V. 4. P. 87-101.
SOIL QUALITY IN ORGANIC AGRICULTURAL SYSTEMS -
DELATE, K., CAMBARDELLA, C.A., KARLEN, D.L. SOIL QUALITY IN ORGANIC AGRICULTURAL SYSTEMS. IOWA COOPERATIVE EXTENSION PUBLICATION. 2002. PM #1882. ISU COOP EXTENSION SERVICE, AMES, IA.
CONSERVATION TILLAGE AND CROPPING INNOVATION: CONSTRUCTING THE NEW CULTURE OF AGRICULTURE (A BOOK REVIEW) -
KARLEN, D.L., CLEARFIELD, F., NOWAK, P. CONSERVATION TILLAGE AND CROPPING INNOVATION: CONSTRUCTING THE NEW CULTURE OF AGRICULTURE (A BOOK REVIEW). JOURNAL OF SOIL AND WATER CONSERVATION SOCIETY. 2001. V. 56. P. 272-273.
SOIL QUALITY: A BASIS FOR SUSTAINABLE WEED AND INSECT MANAGEMENT -
SOIL QUALITY ANALYSES: CAN THEY FIT INTO A SOIL TEST LAB OPERATION? -
SWINE MANURE MANAGEMENT CHALLENGES ON TILE-DRAINED SOILS -
KARLEN, D.L., CAMBARDELLA, C.A. SWINE MANURE MANAGEMENT CHALLENGES ON TILE-DRAINED SOILS. AMERICAN SOCIETY OF AGRONOMY MEETINGS. 2001. CD-ROM. MADISON, WI.
SPATIAL AND TEMPORAL VARIABILITY OF SOIL CARBON -
KASPAR, T.C., PARKIN, T.B., CAMBARDELLA, C.A., KARLEN, D.L., TOMER, M.D. SPATIAL AND TEMPORAL VARIABILITY OF SOIL CARBON. ASA-CSSA-SSSA ANNUAL MEETING ABSTRACTS. 2001. CD-ROM. MADISON, WI.
SOIL QUALITY RESEARCH IN THE U.S.A. -
KARLEN, D.L., ANDREWS, S.S. SOIL QUALITY RESEARCH IN THE U.S.A. KOREAN SOCIETY OF SOIL SCIENCE AND FERTILIZER CONFERENCE. 2001. P. 39-46.
FINE-TUNING YOUR WRITING - A BOOK REVIEW -
KARLEN, D.L. FINE-TUNING YOUR WRITING - A BOOK REVIEW. CROP SCIENCE. 2002. V. 42. P. 655-656.
N-MANAGEMENT AND CROP ROTATION EFFECTS ON YIELD AND RESIDUAL SOIL NITRATE LEVELS -
BAKHSH, A., KANWAR, R.S., KARLEN, D.L., CAMBARDELLA, C.A., BAILEY, T.B., COLVIN, T.S. N-MANAGEMENT AND CROP ROTATION EFFECTS ON YIELD AND RESIDUAL SOIL NITRATE LEVELS. SOIL SCIENCE. 2001. V. 166(8). P. 530-538.
SOIL STRUCTURE AND PLANT ESTABLISHMENT -
KARLEN, D.L. SOIL STRUCTURE AND PLANT ESTABLISHMENT. ENCYCLOPEDIA OF SOIL SCIENCE. 2002. P. 1269-1272.
ON-FARM ASSESSMENT OF SOIL QUALITY IN CALIFORNIA'S CENTRAL VALLEY -
USING FOCUS GROUPS TO DESIGN AN EDUCATIONAL WEBSITE FOR AGRICULTURAL PROFESSIONALS -
ANDREWS, S.S., NISSEN, T.M., WANDER, M.M., WALTER, G., CAVANAUGH-GRANT, D., KARLEN, D.L. USING FOCUS GROUPS TO DESIGN AN EDUCATIONAL WEBSITE FOR AGRICULTURAL PROFESSIONALS. AVAILABLE FROM: www.esa.org/meetings. ECOLOGICAL SOCIETY OF AMERICA ABSTRACTS. 2001.
NITROGEN MANAGEMENT STRATEGIES TO REDUCE NITRATE LEACHING IN TILE-DRAINED MIDWESTERN SOILS -
DINNES, D.L., KARLEN, D.L., JAYNES, D.B., KASPAR, T.C., HATFIELD, J.L., COLVIN, T.S., CAMBARDELLA, C.A. NITROGEN MANAGEMENT STRATEGIES TO REDUCE NITRATE LEACHING IN TILE-DRAINED MIDWESTERN SOILS. AGRONOMY JOURNAL. 2002. V. 94. P. 153-171.
SOIL-TEST DYNAMICS THROUGHOUT A FIVE-YEAR "THOMPSON FARM" ROTATION -
KARLEN, D.L. SOIL-TEST DYNAMICS THROUGHOUT A FIVE-YEAR "THOMPSON FARM" ROTATION. AMERICAN JOURNAL OF ALTERNATIVE AGRICULTURE. 2002. V. 17(1). P. 9-17.
NITRATE LOSS IN SUBSURFACE DRAINAGE AS AFFECTED BY N-FERTILIZER RATE -
Jaynes, D.B., Colvin, T.S., Karlen, D.L., Cambardella, C.A., Meek, D.W. 2001. Nitrate loss in subsurface drainage as affected by N-fertilizer rate. Journal of Environmental Quality. 30:1305-1314.
PLANT-SOIL-MICROBE N RELATIONSHIPS IN HIGH RESIDUE MANAGEMENT SYSTEMS -
DINNES, D.L., JAYNES, D.B., KASPAR, T.C., COLVIN, T.S., CAMBARDELLA, C.A., KARLEN, D.L. PLANT-SOIL-MICROBE N RELATIONSHIPS IN HIGH RESIDUE MANAGEMENT SYSTEMS. SOUTH DAKOTA NO TILL ASSOCIATION ANNUAL CONFERENCE. 2001. P. 45-50.
N MANAGEMENT AND HYPOXIA: A RESEARCH FOCUS OF THE USDA-ARS NATIONAL SOIL TILTH LABORATORY -
Dinnes, D.L., Jaynes, D.B., Hatfield, J.L., Burkart, M.R., Parkin, T.B., Cambardella, C.A., Karlen, D.L., Colvin, T.S., Kaspar, T.C., James, D.E. 2001. N management and hypoxia: A research focus of the USDA-ARS National Soil Tilth Laboratory. Farm Bureau Members National Convention. American Farm Bureau Federation, Washington, D.C.
SOIL QUALITY: CURRENT CONCEPTS AND APPLICATIONS -
ESTIMATING SURFACE SOIL ORGANIC CARBON CONTENT AT A REGIONAL SCALE USING THE NATIONAL RESOURCE INVENTORY -
VISUAL SOIL ASSESSMENT (A BOOK REVEW) -
REDUCING N CONTAMINATION OF SURFACE WATERS FROM TILE-DRAINED SOILS AT THE WATERSHED SCALE -
Dinnes, D.L., Jaynes, D.B., Meek, D.W., Cambardella, C.A., Colvin, T.S., Hatfield, J.L., Karlen, D.L. 2000. Reducing n contamination of surface waters from tile-drained soils at the watershed scale [CD-ROM]. ASA-CSSA-SSSA Annual Meeting Abstracts. Madison, Wisconsin.
USING THE WEIGHT-LOSS-ON-IGNITION METHOD TO MEASURE SPATIAL VARIABILITY OF SOIL CARBON -
A COMPARISON OF SOIL QUALITY ASSESSMENT METHODS FOR ORGANIC AMENDMENT PRACTICES IN CALIFORNIA -
PRE-CROP HYDROLOGY AND INITIAL RESPONSE OF SOIL QUALITY INDICATORS IN A CONTROLLED RHIZOTRON ENVIRONMENT -
Karlen, D.L., Pellack, L.S., Heikens, K.E., Jaynes, D.B. 1999. Pre-crop hydrology and initial response of soil quality indicators in a controlled rhizotron environment [CD-ROM]. ASA-CSSA-SSSA Annual Meeting Abstracts. Madison, Wisconsin.
HISTORICAL OVERVIEW OF SOIL QUALITY -
COMPARING SOIL QUALITY ASSESSMENT METHODS FOR ORGANIC AMENDMENT PRACTICES IN CALIFORNIA -
A COMPARISON OF SOIL QUALITY INDEXING METHODS FOR VEGETABLE PRODUCTION SYSTEMS IN NORTHERN CALIFORNIA -
COMPARING MICROARTHROPOD DIVERSITY AND SOIL QUALITY INDICES IN THREE AGRICULTURAL WATERSHEDS -
Andrews, S.S., Hansen, R., Karlen, D.L., Cambardella, C.A., Moorman, T.B. 2000. Comparing microarthropod diversity and soil quality indices in three agricultural watersheds [abstract]. Ecological Society of America Proceedings. Available:www.esa.org/publications.
ESTIMATING CORN YIELD USING SIX YEARS OF YIELD DATA AND TERRAIN ATTRIBUTES -
WATERSHED SCALE INTENSIVE NITROGEN FERTILIZER MANAGEMENT REDUCES NITROGEN CONTAMINATION OF SURFACE WATERS -
TILLAGE AND N-MANAGEMENT EFFECTS ON CROP YIELD AND RESIDUAL SOIL NITRATE -
Bakhsh, A., Kanwar, R.S., Karlen, D.L., Cambardella, C.A., Colvin, T.S., Moorman, T.B., Bailey, T. 2000. Tillage and n-management effects on crop yield and residual soil nitrate. Transactions of the ASAE. 43(6):1589-1595.
AN AUTOREGRESSION MODEL FOR A PAIRED WATERSHED COMPARISON -
MEEK, D.W., DINNES, D.L., JAYNES, D.B., CAMBARDELLA, C.A., COLVIN, T.S., HATFIELD, J.L., KARLEN, D.L. AN AUTOREGRESSION MODEL FOR A PAIRED WATERSHED COMPARISON. APPLIED STATISTICS IN AGRICULTURE CONFERENCE PROCEEDINGS. 2000. P. 223-231.
IDENTIFICATION OF REGIONAL SOIL QUALITY FACTORS AND INDICATORS: II. NORTHERN MISSISSIPPI LOESS HILLS AND PALOUSE PRAIRIE -
AN AUTOREGRESSION MODEL FOR A PAIRED WATERSHED COMPARISON -
Meek, D.W., Dinnes, D.L., Jaynes, D.B., Cambardella, C.A., Colvin, T.S., Hatfield, J.L., Karlen, D.L. 2000. An autoregression model for a paired watershed comparison. Proceedings of the 12th Applied Statistics In Agriculture Conference. p. 223-231.
VISIONARY LEADERSHIP -
THE SOIL QUALITY CONCEPT: A TOOL FOR EVALUATING SUSTAINABILITY -
SOIL FERTILITY - PHENOMENON AND CONCEPT -
INTENSIVE N FERTILIZER MANAGEMENT EFFECTS ON WATER QUALITY AT THE WATERSHED SCALE -
Dinnes, D.L., Jaynes, D.B., Cambardella, C.A., Colvin, T.S., Hatfield, J.L., Karlen, D.L. 2000. Intensive N fertilizer management effects on water quality at the watershed scale. Proceedings of the Watershed Approach to Improving Water Quality: Fact or Fantasy? Soil and Water Conservation Society. p. 95-99.
INTENSIVE N FERTILIZER MANAGEMENT EFFECTS ON WATER QUALITY AT THE WATERSHED SCALE -
INTENSIVE NITROGEN FERTILIZER MANAGEMENT EFFECTS ON WATER QUALITY AT THE WATERSHED SCALE -
Dinnes, D.L., Jaynes, D.B., Meek, D.W., Cambardella, C.A., Colvin, T.S., Hatfield, J.L., Karlen, D.L. 2000. Intensive nitrogen fertilizer management effects on water quality at the watershed scale. Proceedings of Agriculture and the Environment: A Wake-Up Call for Iowans. Iowa State University Extension, Ames, Iowa.
A SOIL QUALITY INDEX FOR VEGETABLE PRODUCTION IN THE CENTRAL VALLEY -
IDENTIFICATION OF REGIONAL SOIL QUALITY FACTORS AND INDICATORS: I. CENTRAL AND SOUTHERN HIGH PLAINS -
INTENSIVE N FERTILIZER MANAGEMENT EFFECTS ON WATER QUALITY AT THE WATERSHED SCALE -
Dinnes, D.L., Jaynes, D.B., Cambardella, C.A., Colvin, T.S., Hatfield, J.L., Karlen, D.L. 1999. Intensive n fertilizer management effects on water quality at the watershed scale [CD-ROM]. ASA-CSSA-SSSA Annual Meeting Abstracts. Madison, Wisconsin.
SOIL QUALITY, YIELD STABILITY, AND ECONOMIC ATTRIBUTES OF ALTERNATIVE CROP ROTATIONS -
A SOIL QUALITY INDEX FOR VEGETABLE PRODUCTION IN CALIFORNIA -
RHIZOTRON ASSESSMENT OF SOIL QUALITY INDICATORS -
SOIL QUALITY ASSESSMENT AND IMPROVEMENT IN CALIFORNIA'S CENTRAL VALLEY -
DISTRIBUTION AND VARIABILITY OF SOIL PROPERTIES AT THE REGIONAL SCALE -
SPLIT APPLICATION NITROGEN FERTILIZER MANAGEMENT EFFECTS ON CORN YIELD AND WATER QUALITY -
Dinnes, D.L., Jaynes, D.B., Cambardella, C.A., Colvin, T.S., Hatfield, J.L., Karlen, D.L. 1999. Split application nitrogen fertilizer management effects on corn yield and water quality. Farm Bureau Spokesman Press. 1999 Autumn Harvest Issue. Iowa Farm Bureau, West Des Moines, Iowa.
DISTRIBUTION AND VARIABILITY OF SURFACE SOIL PROPERTIES AT A REGIONAL SCALE -
INDEXING SOIL QUALITY IN CALIFORNIA'S CENTRAL VALLEY -
SOIL QUALITY IN THE DRIFTLESS REGION -
SOIL QUALITY ISSUES AND INITIATIVES IN CALIFORNIA'S CENTRAL VALLEY -
FIELD-SCALE WATERSHED EVALUATIONS ON DEEP LOESS SOILS: III. RAINFALL AND FERTILIZER N USE EFFICIENCIES -
Logsdon, S.D., Karlen, D.L., Prueger, J.H., Kramer, L.A. 1999. Field-scale watershed evaluations on deep loess soils: III. Rainfall and fertilizer N use efficiencies. Journal of Soil and Water Conservation. 54:711-716.
VIEWPOINT: OPPORTUNITIES AND CHALLENGES ASSOCIATED WITH WATERSHED-SCALE ASSESSMENTS OF SOIL AND WATER QUALITY -
FIELD-SCALE WATERSHED EVALUATIONS ON DEEP LOESS SOILS: I. TOPOGRAPHY AND AGRONOMIC PRACTICES -
Karlen, D.L., Kramer, L.A., James, D.E., Buhler, D.D., Moorman, T.B., Burkart, M.R. 1999. Field-scale watershed evaluations on deep loess soils: I. topography and agronomic practices. Journal of Soil and Water Conservation. 54(4):693-703.
MODEL-BASED TECHNIQUE TO DETERMINE VARIABLE RATE NITROGEN FOR CORN -
Paz, J.O., Batchelor, W.D., Babcock, B.A., Colvin, T.S., Logsdon, S.D., Kaspar, T.C., Karlen, D.L. 1999. Model-based technique to determine variable rate nitrogen for corn. Agricultural Systems. 61:69-75.
TILLAGE EFFECTS ON PREVIOUSLY FLOODED SOILS -
HERBICIDE TRANSPORT IN SUBSURFACE DRAINAGE WATER LEAVING CORN-SOYBEAN PRODUCTION SYSTEMS -
CHARACTERIZING THE DISTRIBUTION OF ORGANIC CARBON AND EXTRACTABLE PHOSPHORUS AT A REGIONAL SCALE -
ADAPTATION OF SOIL QUALITY INDICES AND APPLICATION TO THREE TILLAGE SYSTEMS IN SOUTHERN ILLINOIS -
A SCORESHEET FOR INTERPRETING SOIL QUALITY TEST KIT EVALUATIONS -
EFFECTS OF AN OPTIMUM FERTILIZER PROGRAM ON CORN YIELD AND WATERSHED WATER QUALITY -
ASSESSING SOIL QUALITY ON A REGIONAL SCALE USING THE NATIONAL RESOURCE INVENTORY -
EFFECTS OF LAND USE ON SOIL QUALITY IN THE CENTRAL HIGH PLAINS -
SPATIAL ANALYSIS OF SOIL FERTILITY PARAMETERS -
ANALYSIS OF WATER STRESS EFFECTS CAUSING SPATIAL YIELD VARIABILITY IN SOYBEANS -
CHLOROPHYLL METER ASSESSMENTS OF CORN RESPONSE TO NITROGEN MANAGEMENT PRACTICES -
WATER QUALITY IN WALNUT CREEK WATERSHED: NITRATE-NITROGEN IN SOILS, SUBSURFACE DRAINAGE WATER AND SHALLOW GROUNDWATER -
MODEL-BASED TECHNIQUE TO DETERMINE VARIABLE RATE NITROGEN FOR CORN -
SPATIAL AND TEMPORAL VARIABILITY IN CORN GROWTH, DEVELOPMENT, INSECT PRESSURE, AND YIELD -
IMPACT OF SWINE MANURE APPLICATION ON GROUNDWATER QUALITY UNDER CONTINUOUS-CORN AND CORN-SOYBEAN PRODUCTION SYSTEMS -
ALTERNATIVE N FERTILIZER MANAGEMENT STRATEGIES EFFECTS ON SUBSURFACE DRAIN EFFLUENT AND N UPTAKE -
EFFECTS OF AN OPTIMUM N FERTILIZER PROGRAM ON CORN YIELD AND WATERSHED WATER QUALITY -
FIELD-SCALE NITROGEN BALANCES ASSOCIATED WITH LONG-TERM CONTINUOUS CORN PRODUCTION -
TILLAGE SYSTEM EFFECTS ON 15-YR CARBON-BASED AND SIMULATED N BUDGETS IN A TILE-DRAINED IOWA FIELD -
ALTERNATIVE CROPPING SYSTEMS TO IMPROVE THE QUALITY OF SHALLOW GROUNDWATER -
ROTATIONS AND REDUCED TILLAGE: PRACTICES FOR IMPROVING SOIL QUALITY -
SOIL QUALITY MONITORING AND ASSESSMENT -
CONSERVATION RESERVE PROGRAM EFFECTS ON SOIL QUALITY INDICATORS -
REDUCING AGRICULTURE'S CONTRIBUTION TO NITRATE CONTAMINATION OF SURFACE WATERS -
EFFECT OF TILLAGE PRACTICES ON SOIL BIOMASS IN POST-CRP LANDS -
WATERSHED SCALE ASSESSMENTS OF SOIL QUALITY AT TWO IOWA LOCATIONS -
INFLUENCE OF NH4-K INTERACTIONS ON NO3 LEACHING -
SPATIAL SCALE REQUIREMENTS FOR PRECISION FARMING INFERRED FROM OBSERVATIONS IN THE SE USA -
SPATIAL AND SEASONAL FACTORS AFFECTING CROP YIELD AND N REMOVAL FROM GLACIAL TILL SOILS -
CALIBRATION OF A CROP GROWTH MODEL TO PREDICT SPATIAL YIELD VARIABILITY -
SUBSURFACE DRAIN WATER QUALITY AS AFFECTED BY MANURE APPLICATION -
SUBSURFACE DRAIN WATER QUALITY AS AFFECTED BY MANURE APPLICATION -
CROPPING SYSTEM EFFECTS ON N REMOVAL, SOIL N, AGGREGATE STABILITY, AND SUBSEQUENT CORN GRAIN YIELD -
EFFECT OF INJECT METHOD OF LIQUID MANURE APPLICATION ON CROP YIELD AND NITROGEN CONTAMINATION OF SHALLOW GROUNDWATER -
A SOIL QUALITY FRAMEWORK FOR EVALUATING THE IMPACT OF CRP -
YIELD VARIABILITY WITHIN A CENTRAL IOWA FIELD -
SPATIAL VARIABILITY ANALYSIS: A FIRST STEP IN SITE-SPECIFIC MANAGEMENT -
IMPACT OF MANURE AND N-MANAGEMENT SYSTEMS ON WATER QUALITY -
WATERSHED-SCALE ASSESSMENT OF SOIL BIOCHEMICAL PROPERTIES: A PRELUDE TO SOIL QUALITY -
A CONCEPTUAL FRAMEWORK FOR ASSESSMENT AND MANAGEMENT OF SOIL QUALITY AND HEALTH -
QUANTIFICATION OF SOIL QUALITY -
ENHANCING CARBON SEQUESTRATION IN CRP-MANAGED LAND -
THE EVOLVING SCIENCE OF SOIL QUALITY -
SOIL PROPERTY CONTRIBUTIONS TO YIELD VARIATION PATTERNS -
SOIL-TEST VARIABILITY IN ADJACENT IOWA FIELDS -
SOIL PROPERTY CONTRIBUTIONS TO YIELD VARIATION PATTERNS -
SIX YEAR YIELD VARIABILITY WITHIN A CENTRAL IOWA FIELD -
ECONOMIC OPPORTUNITY IN YIELD VARIABILITY WITHIN A CENTRAL IOWA FIELD -
SOIL QUALITY: A CONCEPT, DEFINITION, AND FRAMEWORK FOR EVALUATION -
IMPACT OF CRP ON SOIL QUALITY -
RUNOFF, EROSION, AND SOIL QUALITY CHARACTERISTICS OF A FORMER CRP SITE IN SOUTHWESTERN IOWA -
SOIL QUALITY AND SOIL HEALTH: PERSPECTIVES FOR CONSULTANTS -
FERTILIZER 15N RECOVERY WITHIN A TWO-YEAR CORN, WHEAT, AND COTTON ROTATION -
IMPACT OF CRP ON SOIL QUALITY INDICATORS -
THE SANREM APPROACH FOR SELECTING INDICATORS OF SUSTAINABILITY -
CHANGES IN SOIL CHARACTERISTICS AS INFLUENCED BY DIFFERING LONG-TERM TILLAGE PRACTICES -
CRP EFFECTS ON SOIL QUALITY INDICATORS AT SELECTED IOWA LOCATIONS -
NITROGEN MANAGEMENT SYSTEMS FOR SUSTAINABLE CROP PRODUCTION AND WATER QUALITY ENHANCEMENT -
SWINE MANURE AND N-MANAGEMENT SYSTEMS: IMPACT ON GROUNDWATER QUALITY -
TILLAGE AND CROP ROTATION EFFECTS ON DRAINAGE WATER QUALITY -
A SYSTEMS APPROACH: THE KEY TO SUSTAINABILITY -
SOIL QUALITY RESEARCH AT THE NATIONAL SOIL TILTH LABORATORY -
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