Research Soil Scientist
Francisco Calderón
Soil Scientist
Phone: 970-345-0517
E-Mail: Francisco.Calderon@ars.usda.gov
Education
1987 B.S. Biology, Univ. of Puerto Rico
1992 M.S. Biology, Univ. of Puerto Rico
1997 Ph.D. Crop and Soil Science/Microbial Ecology, Michigan State Univ.
Research Interests
Mycorrhizae
Soil microbial ecology
Soil C cycling
Dryland Crop Rotations
Projects
Adaptation of Dryland Cropping Systems for the Central Great Plains Region to Extreme Variation of Weather and Climate In-House Appropriated (D) Accession Number:429466 
Develop Knowledge for the Efficacy of Using Cover Crops in Place of Summer Fallow in Dryland Wheat-fallow Cropping Non-Assistance Cooperative Agreement (S) Accession Number:430157 Development of Wheat Quality, Wheat Based Crop Production Systems and Alternative Bio-Energy Crops for the Central Great Plains Non-Assistance Cooperative Agreement (S) Accession Number:427155
Publications
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will take you to the publication reprint.) 
Soil particulate organic matter dynamics after conservation reserve program land is converted to cropland-(Abstract Only) Calderon, F.J., Kucera, J.M., Acosta Martinez, V., Fultz, L., Chenhui, L. 2016. Soil particulate organic matter dynamics after conservation reserve program land is converted to cropland. ASA-CSSA-SSSA Annual Meeting Abstracts. 2016. An integrated spectroscopic and wet chemical approach to investigate grass litter decomposition chemistry-(Peer Reviewed Journal) Limitations and potential of spectral subtractions in fourier-transform infrared (FTIR) spectroscopy of soil samples -(Peer Reviewed Journal)Margenot, A., Calderon, F.J., Parikh, S. 2015. Limitations and potential of spectral subtractions in fourier-transform infrared (FTIR) spectroscopy of soil samples. Soil Science Society of America Journal. 2015. Cover crop and irrigation e¿ects on soil microbial communities and enzymes in semiarid agroecosystems of the Central Great Plains of North America-(Peer Reviewed Journal) Calderon, F.J., Nielsen, D.C., Acosta Martinez, V., Vigil, M.F., Lyon, D. 2016. Cover crop and irrigation e¿ects on soil microbial communities and enzymes in semiarid agroecosystems of the Central Great Plains of North America. Pedosphere. 26(2): 192-205. Cumulative deficit irrigation effects on corn (Zea mays, L.) biomass and grain yield -(Peer Reviewed Journal)Benjamin, J.G., Nielsen, D.C., Vigil, M.F., Mikha, M.M., Calderon, F.J. 2015. Cumulative deficit irrigation effects on corn (Zea mays, L.) biomass and grain yield. Agricultural Water Management. 159/107-114. Cover crop water use-() Nielsen, D.C., Lyon, D.J., Hergert, G.W., Higgins, R.K., Calderon, F.J., Vigil, M.F. 2015. Cover crop water use. CSA News. Available: http://www.crops.org/publications/CSA/pdfs/60/6/12. Mid-infared (MidIR) and near-infared (NIR) dection of rhizoctonia solani AG 2-2 IIIB on barley based artificial inoculum-(Peer Reviewed Journal) Webb, K.M., Calderon, F.J. 2015. Mid-infared (MidIR) and near-infared (NIR) dection of rhizoctonia solani AG 2-2 IIIB on barley based artificial inoculum. Applied Spectroscopy. 69:1129-1136. Plant nitrogen uptake drives rhizosphere bacterial community assembly during plant growth -(Peer Reviewed Journal)Bell, C., Asao, S., Calderon, F.J., Wolk, B., Wallenstein, M. 2015. Plant nitrogen uptake drives rhizosphere bacterial community assembly during plant growth. Soil Biology and Biochemistry. Available: http://dx.doi.org/10.1016/j.soilbio.2015.03.006. Switchgrass biochar effects on soil microbial dynamics and wheat yield in two soils from different regions -(Peer Reviewed Journal)Kelly, C., Calderon, F.J., Acosta Martinez, V., Mikha, M.M., Benjamin, J.G., Rutherford, D., Rostad, C. 2015. Switchgrass biochar effects on soil microbial dynamics and wheat yield in two soils from different regions. Pedosphere. 25(3): 329–342. Soil organic matter functional group composition in relation to organic C, N and P fractions in organically managed tomato fields characterized by mid-infrared spectroscopy -(Peer Reviewed Journal)Andrew, M., Calderon, F.J., Parikh, S., Jackson, L.E. 2015. Soil organic matter functional group composition in relation to organic C, N and P fractions in organically managed tomato fields characterized by mid-infrared spectroscopy. Soil Science Society of America Journal. doi:10.2136/sssaj2015.02.0070. Chemical indicators of cryoturbation and microbial processing throughout an alaskan permafrost soil depth profile -(Peer Reviewed Journal)Ernakovich, J., Wallenstein, M., Calderon, F.J. 2015. Chemical indicators of cryoturbation and microbial processing throughout an alaskan permafrost soil depth profile. Soil Science Society of America Journal. doi:10.2136/sssaj2014.10.0420. A comparison of corn residue and its biochar on soil C and plant growth -(Peer Reviewed Journal)Calderon, F.J., Benjamin, J.G., Vigil, M.F. 2015. A comparison of corn residue and its biochar on soil C and plant growth. PLoS One. doi:10.1371/journal.pone.0121006. A new conceptual model on the fate and controls of fresh and pyrolized plant litter decomposition-(Peer Reviewed Journal) Soong, J.L., Parton, W., Calderon, F.J., Campbell, N., Cotrufo, M.F. 2015. A new conceptual model on the fate and controls of fresh and pyrolized plant litter decomposition. Biogeochemistry. DOI 10.1007/s10533-015-0079-2. Cover crops in mixtures do not use water differently than single-species plantings -(Peer Reviewed Journal)Nielsen, D.C., Lyon, D.J., Hergert, G.W., Higgins, R.K., Calderon, F.J., Vigil, M.F. 2015. Cover crops in mixtures do not use water differently than single-species plantings. Agronomy Journal. 107:1025-1038. High plains cover crop research-(Proceedings) Nielsen, D.C., Lyon, D.J., Calderon, F.J., Hergert, G.W., Higgins, R. 2015. High plains cover crop research. Cover Your Acres Winter Conference Proceedings. 12:7-12. Soil C dynamics in a 26-year CRP chronosequence on an Amarillo fine sandy loam-(Abstract Only) Fultz, L., Kakarla, M., Moore-Kucera, J., Acosta Martinez, V., Zak, J.C., Horita, J., Calderon, F.J. 2014. Soil C dynamics in a 26-year CRP chronosequence on an Amarillo fine sandy loam[abstract]. American Society of Agronomy, Crop Science Society of America, Soil Science Society of America. November 3-6, 2014, Tampa, Florida. Paper No. 78611. Mid-infared and near-infared detection of Rhizoctonia solani AG 2-2IIIB on barley based artifical inoculum-(Abstract Only) Webb, K.M., Calderon, F.J. 2015. Mid-infared and near-infared detection of Rhizoctonia solani AG 2-2IIIB on barley based artifical inoculum. Meeting Abstract. 38th Biennial Meeting of ASSBT, Clearwater Beach, FL 02/23/2015:02/26/2015. Using fourier-transform mid-infrared spectroscopy to distinguish soil organic matter composition dynamics in aggregate fractions of two agroecosystems -(Peer Reviewed Journal)Fultz, L., Moore-Kucera, J., Calderon, F.J., Acosta Martinez, V. 2014. Using fourier-transform mid-infrared spectroscopy to distinguish soil organic matter composition dynamics in aggregate fractions of two agroecosystems. Soil Science Society of America Journal. 78:1940-1948. Quantifying and characterizing dissolved carbon and nitrogen leaching from litter: a comparison of methods-(Peer Reviewed Journal) Soong, J.L., Betzen, J., Calderon, F.J., Cotrufo, F. 2014. Quantifying and characterizing dissolved carbon and nitrogen leaching from litter: a comparison of methods. Plant and Soil. Available: http://link.springer.com/article/10.1007%2Fs11104-014-2232-4. Diffuse-reflectance mid-infrared spectrocopy reveals chemical differences in soil organic matter carried in different size wind eroded sediments-(Peer Reviewed Journal) Padilla, J., Calderon, F.J., Acosta Martinez, V., Van Pelt, R.S., Gardner, T., Baddock, M., Zobeck, T.M., Noveron, J.C. 2014. Diffuse-reflectance mid-infrared spectrocopy reveals chemical differences in soil organic matter carried in different size wind eroded sediments. Aeolian Research. 15:193-201. Long term alternative crop rotation experiment: USDA-ARS Akron, Colorado-(Abstract Only) Water deficit stress effects on corn (Zea mays, L.) root: shoot ratio -(Peer Reviewed Journal)Benjamin, J.G., Nielsen, D.C., Vigil, M.F., Mikha, M.M., Calderon, F.J. 2014. Water deficit stress effects on corn (Zea mays, L.) root: shoot ratio. Open Journal of Soil Science 4:151-160. Soil chemical insights provided through vibrational spectroscopy -(Peer Reviewed Journal)Parikh, S., Goyne, K.W., Margenot, A.J., Mukome, F., Calderon, F.J. 2014. Soil chemical insights provided through vibrational spectroscopy. Advances in Agronomy. Available: http://digitalcommons.unl.edu/cgi/viewcontent.cgi?article=2473&context=usdaarsfacpub. Soil Enzyme Activities, Microbial Communities and Carbon and Nitrogen Availability in Organic Agroecosystems Across an Intensively-Managed Agricultural Landscape -(Peer Reviewed Journal)Bowles, T.M., Acosta Martinez, V., Calderon, F.J., Jackson, L.E. 2014. Soil enzyme activities, microbial communities and carbon and nitrogen availability in organic agroecosystems across an intensively-managed agricultural landscape. Soil Biology and Biochemistry. 68:252-262. Diffuse-reflectance fourier-transform mid-infrared spectroscopy as a method of characterizing changes in soil organic matter -(Peer Reviewed Journal)Calderon, F.J., Haddix, M., Conant, R., Magrini-Bair, K., Paul, E.A. 2013. Diffuse-reflectance fourier-transform mid-infrared spectroscopy as a method of characterizing changes in soil organic matter. Soil Science Society of America Journal. 77:1591-1600. A comparison of two models to evaluate soil physical property effects on corn (Zea mays, L.)root growth -(Peer Reviewed Journal)Benjamin, J.G., Nielsen, D.C., Vigil, M.F., Mikha, M.M., Calderon, F.J. 2013. A comparison of two models to evaluate soil physical property effects on corn (Zea mays, L.)root growth. Agronomy Journal. 105:713-720. Pyrosequencing reveals bacteria carried in different wind eroded sediments-(Abstract Only) Gardner, T.G., Acosta Martinez, V., Zobeck, T.M., Baddock, M.C., Van Pelt, R.S., Senwo, Z., Calderon, F.J., Cox, S., Dowd, S. 2012. Pyrosequencing reveals bacteria carried in different wind eroded sediments[abstract]. Soil and Water Conservation Society. July 22-25, 2012. Ft. Worth, Texas. Carbon allocation below ground transfers and lipid turnover in a plant-microbial association-(Peer Reviewed Journal) Calderon, F.J., Schultz, D.J., Eldor, P.A. 2012. Carbon allocation below ground transfers and lipid turnover in a plant-microbial association. Soil Science Society of America Journal. 76:1614-1623. Soil carbon and soil organic matter quality in soil size fractions from crop and livestock systems in Texas-(Abstract Only) Pyrosequencing reveal distinct bacteria are carried in different wind eroded sediments from the same soil-(Peer Reviewed Journal) Gardner, T., Acosta Martinez, V., Senwo, Z., Calderon, F.J., Dowd, S., Baddock, M., Van Pelt, R.S., Zobeck, T.M. 2012. Pyrosequencing reveal distinct bacteria are carried in different wind eroded sediments from the same soil. Journal of Environmental Quality. 41(3):744-753. Pyrosequencing and mid-infrared spectroscopy techniques reveal distinct aggregate stratification of soil bacterial communities and organic matter composition-(Peer Reviewed Journal) Davinic, M., Fultz, L.J., Acosta Martinez, V., Calderon, F.J., Cox, S.R., Dowd, S., Allen, V., Zak, J., Moore-Kucera, J. 2012. Pyrosequencing and mid-infrared spectroscopy techniques reveal distinct aggregate stratification of soil bacterial communities and organic matter composition. Soil Biology and Biochemistry. 46:63-72. Aggregate stratification assessment of soil bacterial communities and organic matter composition: Coupling pyrosequencing and mid-infrared spectroscopy techniques-(Abstract Only) Davinic, M., Fultz, L., Moore Kucera, J., Acosta Martinez, V., Calderon, F.J., Cox, S., Allen, V., Zak, J. 2011. Aggregate stratification assessment of soil bacterial communities and organic matter composition: Coupling pyrosequencing and mid-infrared spectroscopy techniques[abstract]. American Society of Agronomy, Crop Science Society of America, Soil Science Society of America Annual Meeting. October 16-19, 2011, San Antonio, Texas. Water use and yields of no-till managed dryland grasspea and yellow pea under different planting configurations-(Peer Reviewed Journal) Calderon, F.J., Vigil, M.F., Nielsen, D.C., Benjamin, J.G., Poss, D.J. 2012. Water use and yields of no-till managed dryland grasspea and yellow pea under different planting configurations. Field Crops Research. 125:179-185. Mid-infrared soil spectral changes due to cultivation, C mineralization, and short-term substrate utilization-(Abstract Only) Diffuse-Reflectance Mid-Infrared Spectral Properties of Soils under Alternative Crop Rotations in a Semiarid Climate -(Peer Reviewed Journal)Calderon, F.J., Mikha, M.M., Vigil, M.F., Nielsen, D.C., Benjamin, J.G., Reeves III, J.B. 2012. Diffuse-reflectance mid-infrared spectral properties of soils under alternative crop rotations in a semiarid climate. Communications in Soil Science and Plant Analysis. 42:17, 2143-2159. Dryland cropping systems influence microbial biomass and enzyme activities in a sandy soil in a semiarid region-(Peer Reviewed Journal) Acosta Martinez, V., Lascano, R.J., Calderon, F.J., Booker, J.D., Zobeck, T.M., Upchurch, D.R. 2011. Dryland cropping systems influence microbial biomass and enzyme activities in a sandy soil in a semiarid region. Biology and Fertility of Soils. 47(6):655-667. Chemical differences in soil organic matter fractions determined by diffuse-reflectance mid-infrared spectroscopy-(Peer Reviewed Journal) Calderon, F.J., Reeves III, J.B., Collins, H.P., Eldor, P.A. 2011. Chemical differences in soil organic matter fractions determined by diffuse-reflectance mid-infrared spectroscopy. Soil Science Society of America Journal. 75(2)568-579. Relating Soil Organic Matter Dynamics to its Molecular Structure-(Abstract Only) Paul, E.A., Mellor, N., Haddix, M., Magrini, K., Calderon, F.J., Morris, S. 2010. Relating Soil Organic Matter Dynamics to its Molecular Structure. Meeting Abstract. Presented at the Soil Organic Matter 2010 Organic Matter Stabilization and Ecosystem Functions. 19 to 23 September 2010. Presquile de Giens (Cote D'Azur)France. Vulnerability of Permafrost Soil Carbon to Climate Warming: Evaluating Controls on Microbial Community Composition-(Abstract Only) Ernakovich, J., Challenger, A., Calderon, F.J., Wallenstein, M. 2010. Vulnerability of Permafrost Soil Carbon to Climate Warming: Evaluating Controls on Microbial Community Composition. Meeting Abstract. Poster presentation at the 13th International Society for Microbial Ecology Meeting. Aug. 22-27, 2010. Seattle, WA. Mid-Infrared Spectroscopic Properties of Humic Acid and Fulvic Acid-Soil Mixtures.-(Proceedings) Calderon, F.J., Reeves III, J.B., Vigil, M.F. 2010. Mid-Infrared Spectroscopic Properties of Humic Acid and Fulvic Acid-Soil Mixtures.. Meeting Proceedings. 15th Annual Meeting of the International Humic Substances Society, June 27-July 2, 2010. Tenerife, Spain. Diffuse-Reflectance Fourier-Transform Mid-Infrared Spectroscopy as a Method of Characterizing Changes in Soil Organic Matter-(Abstract Only) Mid-Infrared Spectroscopic Properties of Humic Acid and Fulvic Acid-Soil Mixtures-(Abstract Only) Calderon, F.J., Reeves Iii, J.B., Vigil, M.F. 2010. Mid-Infrared Spectroscopic Properties of Humic Acid and Fulvic Acid-Soil Mixtures. Meeting Abstract. Presented at the 15th International Humic Substances Society Meeting. June 27 to July 2, 2010. Pto. De la Cruz, Tenerife, Spain. Fallow Effects on Soil-() Nielsen, D.C., Calderon, F.J. 2011. Fallow Effects on Soil. p. 287-300 In J.L. Hatfield and T.J. Sauer (ed) Soil Management:building a stable base for agriculture. ASA and SSSA, Madison, WI. Alternative Dryland Cropping Systems to Wheat Fallow-(Abstract Only) Vigil, M.F., Nielsen, D.C., Benjamin, J.G., Calderon, F.J., Mikha, M.M. 2009. Alternative Dryland Cropping Systems to Wheat Fallow. Agronomy Abstracts. Presented at the ASA-CSSA-SSSA Annual meeting. Nov. 1-5, 2009. Pittsburg, PA. Mid-Infrared and Near Infrared Calibrations for Nutritional Parameters of Triticale (Triticosecale) and Pea (Pisum sativum) -(Peer Reviewed Journal)Calderon, F.J., Reeves III, J.B., Vigil, M.F., Poss, D.J. 2009. Mid-Infrared and Near Infrared Calibrations for Nutritional Parameters of Triticale (Triticosecale) and Pea (Pisum sativum). Journal of Agriculture and Food Chemistry. 57:5136-5142. doi:10.1021/jf803936x. Sunflower Production in Skip Row Configurations for the Semi-Arid Central Plains-(Proceedings) Calderon, F.J., Schneekloth, J., Nielsen, D.C., Vigil, M.F. 2009. Sunflower Production in Skip Row Configurations for the Semi-Arid Central Plains. Meeting Proceedings. Presented at the National Sunflower Association Research Forum. Jan. 12-15, 2009. Fargo, ND. Pages 1-4. Mid-Infrared and Near-Infrared Spectroscopic Properties of Fusarium Isolates: Effects of Culture Conditions-(Proceedings) Calderon, F.J., Hanson, L.E., Panella, L.W., Reeves III, J.B., Vigil, M.F. 2009. Mid-Infrared and Near-Infrared Spectroscopic Properties of Fusarium Isolates: Effects of Culture Conditions. Meeting proceedings poster presentation at the American Phytopathological Society Annual Meeting. Aug. 1-5, 2009. Portland, OR. Mid-Infrared and Near Infrared Spectral Properties of Mycorrhizal and Non-Mycorrhizal Root Cultures-(Peer Reviewed Journal) Calderon, F.J., Acosta Martinez, V., Douds, D.D., Reeves III, J.B., Vigil, M.F. 2009. Mid-Infrared and Near Infrared Spectral Properties of Mycorrhizal and Non-Mycorrhizal Root Cultures. Journal of Applied Spectroscopy. 63(5)494-500. Gas Flux in Tillage Field That Have Been in No-Tillage for 12 Years-(Abstract Only) Mikha, M.M., Vigil, M.F., Calderon, F.J. 2008. Gas Flux in Tillage Field That Have Been in No-Tillage for 12 Years. Agronomy Abstract. Presented at the International American Society of Agronomy meetings, Crop Science Society of America and Soil Science Society of America (ASA/CSSA/SSSA) annual meetings. Oct. 5-9, 2008. Houston, TX. Proso Millet Yield and Residue Mass Following Direct Harvest with a Stripper-header-(Abstract Only) Nielsen, D.C., Henry, W.B., Vigil, M.F., Calderon, F.J., West, M.S. 2008. Proso Millet Yield and Residue Mass Following Direct Harvest with a Stripper-header. Agronomy Abstract. Presented at the International American Society of Agronomy meetings, Crop Science Society of America and Soil Science Society of America (ASA/CSSA/SSSA) annual meetings. Oct. 5-9, 2008. Houston, TX. Alternative Crop Rotations in the Semi-arid Central Great Plains Region: How Much Fallow? Evaluating the Economics-(Proceedings) Vigil, M.F., Mikha, M.M., Nielsen, D.C., Benjamin, J.G., Calderon, F.J. 2008. Alternative Crop Rotations in the Semi-arid Central Great Plains Region: How Much Fallow? Evaluating the Economics. Meeting Proceedings. Presented at the XXI Congreso Argentino de la Ciencia Del Suelo. 13 al 16 de Mayo de 2008. Potrero de los Funes (San Luis) Argentina. Page 524. Best Management Practices for Remediation/Restoration of Degraded Soils in the Central Great Plains Region-(Proceedings) Mikha, M.M., Vigil, M.F., Benjamin, J.G., Poss, D.J., Calderon, F.J. 2008. Best Management Practices for Remediation/Restoration of Degraded Soils in the Central Great Plains Region. Meeting Proceedings of the 18th High Altitude Revegetation Workshop #18. Information Series #105. Pages 461-470. March 4-6, 2008. Fort Collins, Colo. A Use of Skip-Row Planting as a Strategy for Drought Mitigation in the West Central Great Plains-(Proceedings) Vigil, M.F., Henry, W.B., Calderon, F.J., Poss, D.J., Nielsen, D.C., Benjamin, J.G., Klein, R. 2008. A use of Skip-row Planting as a Strategy for Drought Mitigation in the West Central Great Plains. Meeting Proceedings. Presented at the 2008 Great Plains Soil Fertility Conference. Denver, Colo. March 5, 2008. Vol. 12:101-106. Soil Nitrogen Budgets-() Meisinger, J.J., Calderon, F.J., Jenkinson, D.S. 2008. Soil Nitrogen Budgets. American Society of Agronomy Monograph Series. 13:505-562. Proso millet yield and residue mass following direct harvest with a stripper-header-(Peer Reviewed Journal) Henry, W.B., Nielsen, D.C., Vigil, M.F., Calderon, F.J., West, M.S. 2008. Proso millet yield and residue mass following direct harvest with a stripper-header. Agronomy Journal. 100:580-584. Proso Millet Yield and Residue Mass Following Direct Harvest with a Stripper-header-(Peer Reviewed Journal) Henry, W.B., Nielsen, D.C., Vigil, M.F., Calderon, F.J., West, M.S. 2008. Proso Millet Yield and Residue Mass following Direct Harvest with a Stripper-Header. Agronomy Journal 100:580-584. A Comparison of Dryland Grasspea (Lathyrus sativus L.) and Admiral Pea (Pisum sativum L.) Grown Under Different Row Spacings-(Proceedings) Calderon, F.J., Vigil, M.F., Nielsen, D.C., Benjamin, J.G., Mikha, M.M. 2008. A comparison of Dryland Grasspea (lathyrus sativus l.) and Admiral Pea (pisum sativum l.) Grown Under Different Row Spacings. Meeting Proceedings. Presented at the 2008 Great Plains Soil Fertility Conference. Denver, Colo. March 5, 2008. Vol. 12:107-111. Comparison of Diffuse Reflectance Fourier Transform Mid-Infrared and Near-Infrared Spectroscopy with Grating-Based Near-Infrared for the Determination of Fatty Acids in Forages-(Peer Reviewed Journal) Calderon, F.J., Reeves III, J.B., Foster, J.G., Clapham, W.M., Fedders, J.M., Vigil, M.F., Henry, W.B. 2007. Comparison of Diffuse Reflectance Fourier Transform Mid-Infrared and Near-Infrared Spectroscopy with Grating-Based Near-Infrared for the Determination of Fatty Acids in Forages. Journal of Agricultural and Food Chemistry 55:8302-8309. Diffuse Reflectance Fourier Transform Mid-Infrared Spectral Properties of Forages with Varied Fatty Acid Content-(Abstract Only) Calderon, F.J., Reeves Iii, J.B., Foster, J.G., Clapham, W.M., Fedders, J.M., Vigil, M.F., Henry, W.B. 2007. Diffuse Reflectance Fourier Transform Mid-Infrared Spectral Properties of Forages with Varied Fatty Acid Content. Meeting Abstract. Presented at the 2007 National Federation of Analytical Chemistry and Spectroscopy Societies annual meeting. Oct. 14-18, 2007. Memphis, TN. Soil Water Extraction Patterns in Skip Row Corn, Sorghum, and Sunflower-(Abstract Only) Nielsen, D.C., Vigil, M.F., Calderon, F.J., Schneekloth, J., Poss, D.J., Henry, W.B., Benjamin, J.G. 2007. Soil Water Extraction Patterns in Skip Row Corn, Sorghum, and Sunflower. Meeting Abstract. Presented at the National American Society of Agronomy Annual Meeting. Nov. 5-8, 2007. New Orleans, LA. Diffuse Reflectance Fourier Transform Mid-infrared Spectral Properties of Forages with Varied Fatty Acid Content-(Abstract Only) Calderon, F.J., Reeves Iii, J.B., Foster, J.G., Clapham, W.M., Fedders, J.M., Vigil, M.F., Henry, W.B. 2007. Diffuse Reflectance Fourier Transform Mid-infrared Spectral Properties of Forages with Varied Fatty Acid Content. Meeting Abstract. Presented at the Federation of Analytical Chemistry and Spectroscopy Societies Conference. October 14-18, 2007. Memphis, TN. Cropping Intensity Effects on Physical Properties of a No-till Silt Loam Soil-(Peer Reviewed Journal) Benjamin, J.G., Mikha, M.M., Nielsen, D.C., Vigil, M.F., Calderon, F.J., Henry, W.B. 2007. Cropping Intensity Effects on Physical Properties of a No-till Silt Loam Soil. Soil Science Society of America Journal 71:1160-1165. Weed control possibilities and harvest strategies for the Omega-3 fatty acid producing crop common purslane (Portulacca oleracea var. sativa)-(Abstract Only) Henry, W.B., Nielsen, D.C., Foster, J.G., Calderon, F.J., Vigil, M.F. 2007. Weed control possibilities and harvest strategies for the Omega-3 fatty acid producing crop common purslane (Portulacca oleracea var. sativa) [abstract]. Proceedings 2007 Weed Science Society of America Annual Meeting. p. 56. Skip-Row Planting as a Drought Avoidance Strategy in the West Central Great Plains-(Abstract Only) Vigil, M.F., Henry, W.B., Nielsen, D.C., Calderon, F.J., Benjamin, J.G., Klien, R. 2006. Skip-Row Planting as a Drought Avoidance Strategy in the West Central Great Plains. Agronomy Abstracts. Presented at the National American Society of Agronomy Meetings/Soil Science Society of America (ASA/SSSA)Annual Meetings. November 13-16, 2006. Indianapolis, IN. DRIFTS AND NEAR INFRARED SPECTROSCOPY ANALYSIS OF FRESH AND DECOMPOSED CATTLE MANURE-(Proceedings) Calderon, F.J., Reeves Iii, J.B. 2007. Drifts and Near Infrared Spectroscopy Analysis of Fresh and Decomposed Cattle Manure. Meeting Proceedings of the 12th International Conference on Near Infrared Spectroscopy in Auckland, New Zealand. April 10-15, 2005. Pages 45-48. Diffuse-Reflectance Mid-IR and NIR Spectroscopic Properties of Mycorrhizal and Non-mycorrhizal roots-(Abstract Only) Calderon, F.J., Acosta Martinez, V. 2006. Diffuse-Reflectance Mid-IR and NIR Spectroscopic Properties of Mycorrhizal and Non-mycorrhizal roots. Meeting Abstract. Federation of Analytical Chemistry and Spectroscopy (FACSS) National Meeting for the Society for Applied Spectroscopy. Sept. 24-28, 2006. Lake Buena Vista, FL. Skip-row Planting in the CGPR as a Drought Mitigation Strategy-(Abstract Only) Vigil, M.F., Henry, W.B., Poss, D.J., Nielsen, D.C., Calderon, F.J., Benjamin, J.G., Klein, R. 2006. Skip-row Planting in the CGPR as a Drought Mitigation Strategy. Meeting Abstract. Presented at the 18th World Congress of Soil Science in Phildelphia, PA July 9-13, 2006. DIFFUSE REFLECTANCE MID-INFRARED SPECTROSCOPY (DRIFTS) OF SOILS UNDER DIFFERENT TILLAGE AND CROP ROTATION REGIMES-(Abstract Only) Calderon, F.J., Venterea, R.T. 2005. Diffuse reflectance mid-infrared spectroscopy (drifts) of soils under different tillage and crop rotation regimes. Agronomy Abstract. Presented at the 2005 ASA.CSSA-SSSA International Annual Meeting. Nov.6-10, 2005. Salt Lake City, UT PYROLISIS-MS AND FT-IR ANALYSIS OF FRESH AND DECOMPOSED DAIRY MANURE-(Peer Reviewed Journal) Calderon, F.J., Reeves III, J.B., McCarty, G.W. 2005. Pyrolisis-MS and FT-IR analysis of fresh and decomposed dairy manure. Journal of Analytical & Applied Pyrolysis. 76:14-23. CARBON SEQUESTRATION AND AGGREGATE SIZE DISTRIBUTION AS AFFECTED BY CROPPING INTENSITY-(Abstract Only) Mikha, M.M., Vigil, M.F., Benjamin, J.G., Nielsen, D.C., Henry, W.B., Calderon, F.J. 2005. Carbon sequestration and aggregate size distribution as affected by cropping intensity. Agronomy Abstract. Presented at the 2005 ASA, CSSA-SSSA International Annual Meeting. Nov. 6-10, 2005. Salt Lake City, UT. HOW MUCH FALLOW; EVALUATING THE ECONOMICS OF ALTERNATIVE ROTATIONS AT AKRON, COLORADO-(Abstract Only) Vigil, M.F., Nielsen, D.C., Henry, W.B., Benjamin, J.G., Mikha, M.M., Calderon, F.J. 2005. How much fallow: Evaluating the economics of alternative rotations at Akron, Colorado. Agronomy Abstract. Presented at the 2005 ASA,CSSA-SSSA International Annual Meeting. Nov. 6-10, 2005. Salt Lake City, UT FOURIER-TRANSFORMED DIFFUSE REFLECTANCE TO MEASURE HERBICIDE INJURY IN THE NIR AND MID-IR IN SOYBEAN AND WEED SPECIES-(Abstract Only) Henry, W.B., Calderon, F.J., Shaner, D.L. 2005. Fourier-transformed diffuse reflectance to measure herbicide injury in the nir and mid-ir in soybean and weed species. Agronomy Abstract. Presented at the 2005 ASA, CSSA-SSSA International Annual Meeting. Nov. 6-10, 2005. Salt Lake City, UT RESPONSE OF MICROBIAL COMMUNITY COMPOSITION AND ACTIVITY IN AGRICULTURAL AND GRASSLAND SOILS AFTER SIMULATED RAINFALL-(Peer Reviewed Journal) Steenwerth, K.L., Jackson, L.E., Calderon, F.J., Scow, K.M., Rolston, D.E. 2005. Response of microbial community composition and activity in agricultural and grassland soils after simulated rainfall. Soil Biology and Biochemistry. 37: 2249-2262. ANALYSIS OF MANURE AND SOIL NITROGEN MINERALIZATION DURING INCUBATION-(Peer Reviewed Journal) Calderon, F.J., Mccarty, G.W., Reeves III, J.B. 2005. Analysis of manure and soil nitrogen mineralization during incubation. Biology and Fertility of Soils. 41:328-336. NITRAPYRIN DELAYS DENITRIFICATION ON MANURED SOILS-(Peer Reviewed Journal) Calderon, F.J., Reeves III, J.B., Mccarty, G.W. 2005. Nitrapyrin delays denitrification on manured soils. Soil Science. 170(5):350-359. NIR AND FT-IR ANALYSIS OF FRESH AND DECOMPOSED CATTLE MANURE-(Abstract Only) Calderon, F.J., Reeves III, J.B. 2005. Nir and FT-IR analysis of fresh and decomposed cattle manure. Meeting Abstract. The 12th International Conference on Near Infrared Spectroscopy. April 10-15, 2005. Auckland, New Zealand CHANGES IN SOIL AFTER 14 YEARS OF NO-TILL ALTERNATIVE CROP ROTATION RESEARCH-(Proceedings) Vigil, M.F., Nielsen, D.C., Benjamin, J.G., Henry, W.B., Mikha, M.M., Calderon, F.J., Anderson, R.L., Bowman, R.A. 2005. Changes in soil after 14 years of no-till alternative crop rotation research. Proceedings of the 17th Annual Winter Conference, Colorado Conservation Tillage Association in cooperation with National Sunflower Association presents The High Plains No-Till Conference. Feb. 1-2. 2005. Island Grove Park, Greeley, CO. P. L1-L6. INFRARED SPECTROSCOPY OF CATTLE MANURE AFTER SOIL APPLICATION-(Abstract Only) Calderon, F.J., Reeves III, J.B., McCarty, G.W. 2004. Infrared spectroscopy of cattle manure after soil application. Agronomy Abstracts. Presented at the 2004 ASA-CSSA-SSSA International Annual Meeting. Oct. 31-Nov. 4, 2004. Seattle, WA. CD-ROM #3781. CARBON AND NITROGEN DYNAMICS DURING INCUBATION OF MANURED SOIL-(Peer Reviewed Journal) Calderon, F.J., Reeves III, J.B., McCarty, G.W., Van Kessel, J.S. 2004. Carbon and nitrogen dynamics during incubation of manured soil. Soil Science Society America Journal. 68(5):1592-1599. ON-FARM ASSESSMENT OF ORGANIC MATTER AND TILLAGE MANAGEMENT ON VEGETABLE YIELD, SOIL, WEEDS, PESTS, AND ECONOMICS IN CALIFORNIA-(Peer Reviewed Journal) Jackson, L.E., Ramirez, I., Yokota, R., Fennimore, S.A., Koike, S.T., Henderson, D.M., Chaney, W.E., Calderon, F.J., Klonsky, K. 2004. On-farm assessment of organic matter and tillage management on vegetable yield, soil, weeds, pests, and economics in California. Agriculture Ecosystems and the Environment. 103:443-463. NITROGEN MINERALIZATION AND CHANGES IN MANURE ORGANIC MATTER AFTER SOIL APPLICATION-(Abstract Only) Calderon, F.J., Reeves III, J.B., Mccarty, G.W. 2003. Nitrogen mineralization and changes in manure organic matter after soil application [abstract]. American Society of Agronomy. Agronomy Abstracts 2003 CDROM S05-calderon187520. MANURE PROPERTIES: EFFECT ON C AND N MINERALIZATION DURING LABORATORY INCUBATION OF MANURE AMENDED SOIL-(Abstract Only) Calderon, F.J., Van Kessel, J.S., Mccarty, G.W., Reeves Iii, J.B. 2002. Manure properties: effect on c and n mineralization during laboratory incubation of manure amended soil. USDA Symposium on Natural Resource Management to Offset Greenhouse Gas Emissions.
