Projects

MANAGING AGRICULTURAL WATER QUALITY IN FIELDS AND WATERSHEDS: NEW PRACTICES AND TECHNOLOGIES Appropriated (D)   Accession Number: 422830

ENHANCING FARMLAND WATER QUALITY & AVAILABILITY THROUGH SOIL-BUILDING CROP ROTATIONS & ORGANIC PRACTICES Reimbursable (R)   Accession Number: 419534

DEVELOPMENT OF A GIS-BASED RUSLE2 INTERFACE TEMPLATE FOR USE WITH IOWA'S LIDAR DIGITAL ELEVATION DATA Specific Cooperative Agreement (S)   Accession Number: 414432

Publications (Clicking on the reprint icon will take you to the publication reprint.)

Using the response surface method for empirical tradeoffs between economics and the environment at the farm level - (Peer Reviewed Journal) - (25-Feb-13)

Rational polynomial functions for modeling E. coli and bromide breakthrough - (Peer Reviewed Journal) - (18-Jul-12)

Effectiveness of conservation practices within watersheds: Case study in tile-drained systems - (Abstract Only) - (29-May-12)

Root Zone Water Quality Model (RZWQM2): Model use, calibration, and validation - (Peer Reviewed Journal)

Ma, L., Ahuja, L.R., Nolan, B., Malone, R.W., Trout, T.J., Qi, Z. 2012. Root Zone Water Quality Model (RZWQM2): Model use, calibration, and validation. Transactions of the ASABE. 55(4):1425-1446.

Simulating the surface energy balance in a soybean canopy with SHAW and RZ-SHAW models - (Peer Reviewed Journal)

Ma, L., Flerchinger, G.N., Ahuja, L.R., Sauer, T.J., Prueger, J.H., Malone, R.W., Hatfield, J.L. 2012. Simulating the surface energy balance in a soybean canopy with SHAW and RZ-SHAW models. Transactions of the ASABE. 55(1):175-179.

Verifiable metamodels for nitrate losses to drains and groundwater in the corn belt, USA - (Peer Reviewed Journal)

Nolan, B.T., Malone, R.W., Gronberg, J., Thorp, K.R., Ma, L. 2012. Verifiable metamodels for nitrate losses to drains and groundwater in the corn belt, USA. Environmental Science and Technology. 46:901-908.

A protocol for parameterization and calibration of RZWQM2 in field research - (Book / Chapter)

Ma, L., Ahuja, L.R., Saseendran, S.A., Malone, R.W., Green, T.R., Nolan, B.T., Bartling, P.N., Flerchinger, G.N., Boote, K.J., Hoogenboom, G. 2011. A protocol for parameterization and calibration of RZWQM2 in field research. Soil Science Society of America Special Publication Book Chapter. p.1-64.

Modeling the effects of controlled drainage, N rate and weather on nitrate loss to subsurface drainage - (Peer Reviewed Journal)

Fang, Q.X., Malone, R.W., Ma, L., Jaynes, D.B., Thorp, K.R., Green, T.R., Ahuja, L.R. 2012. Modeling the effects of controlled drainage, N rate and weather on nitrate loss to subsurface drainage. Agricultural Water Management. 103:150-161.

Calibrating RZWQM2 model for maize responses to deficit irrigation - (Peer Reviewed Journal)

Ma, L., Trout, T.J., Ahuja, L.R., Bausch, W.C., Saseendran, S.A., Malone, R.W., Nielsen, D.C. 2011. Calibrating RZWQM2 model for maize responses to deficit irrigation. Agricultural Water Management. 103 (2012):140-149.

Extending results from agricultural fields with intensively monitored data to surrounding areas for water quality management - (Peer Reviewed Journal)

Heilman, P., Malone, R.W., Ma, L., Hatfield, J.L., Ahuja, L.R., Boyle, K., Kanwar, R. 2012. Extending results from agricultural fields with intensively monitored data to surrounding areas for water quality management. Agricultural Systems. 106:59-71.

Simulating nitrate-nitrogen concentration from a subsurface drainage system in response to nitrogen applicaton rates using RZWQM2 - (Peer Reviewed Journal)

Qi, Z., Ma, L., Helmers, M.J., Ahuja, L.R., Malone, R.W. 2012. Simulating nitrate-nitrogen concentration from a subsurface drainage system in response to nitrogen applicaton rates using RZWQM2. Journal of Environmental Quality. 41(1):289-295.

Simulating long-term impacts of winter rye cover crop on hydrologic cycling and nitrogen dynamics for a corn-soybean crop system - (Peer Reviewed Journal)

Qi, Z., Helmers, M., Malone, R.W., Thorp, K.R. 2011. Simulating long-term impacts of winter rye cover crop on hydrologic cycling and nitrogen dynamics for a corn-soybean crop system. Transactions of the ASABE. 54:1575-1588.

Continuum of risk analysis methods to assess tillage system sustainability at the experimental plot level - (Peer Reviewed Journal)

Fathelrahman, E.M., Ascough II, J.C., Hoag, D.L., Malone, R.W., Heilman, P., Wiles, L., Kanwar, R.S. 2011. Continuum of risk analysis methods to assess tillage system sustainability at the experimental plot level. Sustainability. 3(7):1035-1063. DOI:10.3390/su3071035.

Cover crop effects on nitrogen load in tile drainage from Walnut Creek Iowa using root zone water quality model (RZWQM) - (Peer Reviewed Journal)

Singer, J.W., Malone, R.W., Jaynes, D.B., Ma, L. 2011. Cover crop effects on nitrogen load in tile drainage from Walnut Creek, Iowa, using root zone water quality model (RZWQM). Agricultural Water Management. 98(10):1622-1628.

Quality assurance of weather data for agricultural system model input - (Book / Chapter)

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.

Inverse modeling with RZWQM2 to predict water quality - (Book / Chapter)

Nolan, B.T., Malone, R.W., Ma, L., Green, C.T., Fienen, M.N., Jaynes, D.B. 2011. Inverse modeling with RZWQM2 to predict water quality. In: Ahuja, L.R., Ma, L., editors. Methods of Introducing System Models into Agricultural Research. Madison, WI: Agronomy Society of America, Crop Science Society of America, Soil Science Society of America Meeting. p. 327-363.

Drainage water management for reducing nitrate losses from tile drained fields - (Other)

Jaynes, D.B., Malone, R.W., Thorp, K.R. 2010. Drainage water management for reducing nitrate losses from tile drained fields. In: Rudebusch, L., (ed.) Getting into soil and water: 2010. Iowa Water Center, Ames, IA. p. 28-30.

Quasi-biennial corn yield cycles in Iowa - (Abstract Only)

Malone, R.W., Meek, D.W., Hatfield, J.L., Ma, L. 2010. Quasi-biennial corn yield cycles in Iowa. American Society of Agronomy Annual Meetings [abstract]. ASA-CSSA-SSSA Annual Meeting. Oct. 31 - Nov. 4, 2010, Long Beach, CA. CD-ROM.

An economic and stochastic efficiency comparison of tillage systems in corn and soybean under risk - (Peer Reviewed Journal)

Fathelrahman, E.M., Ascough II, J.C., Hoag, D.L., Malone, R.W., Heilman, P., Wiles, L., Kanwar, R.S. 2011. An economic and stochastic efficiency comparison of tillage systems in corn and soybean under risk. Experimental Agriculture. 47(1):111-136.

Optimizing Soil Hydraulic Parameters in RZWQM2 Under Fallow Conditions - (Peer Reviewed Journal) - (26-May-10)

Soil-test N recommendations augmented with PEST optimized RZWQM simulations - (Peer Reviewed Journal)

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.

Predicting Unsaturated Zone Nitrogen Mass Balances in Agricultural Settings of the United States - (Peer Reviewed Journal)

Nolan, T., Puckett, L., Ma, L., Green, C.T., Bayless, E.R., Malone, R.W. 2010. Predicting Unsaturated Zone Nitrogen Mass Balances in Agricultural Settings of the United States. Journal of Environmental Quality. 39(3):1051-1065.

RZWQM predicted effects of soil N testing with incorporated automatic parameter optimization software (PEST) and weather input quality control - (Abstract Only)

Malone, R.W., Jaynes, D.B., Ma, L., Nolan, B., Meek, D.W. 2009. RZWQM predicted effects of soil N testing with incorporated automatic parameter optimization software (PEST) and weather input quality control. American Society of Agronomy Annual Meetings [abstracts]. ASA-CSSA-SSSA Annual Meeting, Nov. 1-4, 2009, Pittsburgh, PA. CD-ROM.

A step by step procedure for parameterization, calibration, validation, and application of a system model in field research - (Abstract Only)

Ma, L., Ahuja, L.R., Malone, R.W., Green, T.R. A Step by Step Procedure for Parameterization, Calibration, Validation, and Application of a System Model in Field Research. ASA-CSSA-SSSA Annual Meeting Abstracts.

Escherichia coli Transport from Surface-Applied Manure to Subsurface Drains through Artificial Biopores - (Peer Reviewed Journal)

Guzman, J., Fox, G., Malone, R.W., Kanwar, R. 2009. Escherichia coli Transport from Surface-Applied Manure to Subsurface Drains through Artificial Biopores. Journal of Environmental Quality. 38:2412-2421.

Irrigation Strategies To Improve Water Use Efficiency in the Wheat-Maize Double Cropping System in China - (Peer Reviewed Journal)

Fang, Q., Ma, L., Yu, Q., Ahuja, L.R., Malone, R.W., Hoogenboom, G. 2009. Irrigation Strategies To Improve Water Use Efficiency in the Wheat-Maize Double Cropping System in China. Agricultural Water Management. 97 (8):1165-1174.

Quasi-Biennial Corn Yield Cycles - (Peer Reviewed Journal)

Malone, R.W., Meek, D.W., Hatfield, J.L., Mann, M., Jaquis, R.J., Ma, L. 2009. Quasi-Biennial Corn Yield Cycles. Agricultural and Forest Meteorology. 149(6&7):1087-1094.

Winter Cover Crop Effects on Nitrate Leaching in Subsurface Drainage as Simulated by RZWQM-DSSAT - (Peer Reviewed Journal)

Li, L., Malone, R.W., Ma, L., Kaspar, T.C., Jaynes, D.B., Saseendran, S.A., Thorp, K.R., Yu, Q., Ahuja, L.R. 2008. Winter Cover Crop Effects on Nitrate Leaching in Subsurface Drainage as Simulated by RZWQM-DSSAT. Transactions of the ASABE. 51:1575-1583.

DRAINMOD-N II: Evaluated for an agricultural system in Iowa and compared to RZWQM-DSSAT - (Peer Reviewed Journal)

Thorp, K.R., Youssef, M.A., Jaynes, D.B., Malone, R.W., Ma, L. 2009. DRAINMOD-N II: Evaluated for an agricultural system in Iowa and compared to RZWQM-DSSAT. Transactions of the ASABE. 52(5):1557-1573.

Modeling Nitrogen and Water Management Effects in a Wheat-Maize Double-Cropping System - (Peer Reviewed Journal)

Fang, Q., Ma, L., Yu, Q., Malone, R.W., Saseendran, S.A., Ahuja, L.R. 2008. Modeling Nitrogen and Water Management Effects in a Wheat-Maize Double-Cropping System. Journal of Environmental Quality. 37:2232-2242.

Simulated Effects of Nitrogen Management and Soil Microbes on Soil Nitrogen Balance and Crop Production - (Peer Reviewed Journal)

Ma, L., Malone, R.W., Jaynes, D.B., Thorp, K.R., Ahuja, L.R. 2008. Simulated Effects of Nitrogen Management and Soil Microbes on Soil Nitrogen Balance and Crop Production. Soil Science Society of America Journal. 72:1594-1603.

Simulated Corn Stover Removal Effects on Soil Organic Carbon and Nitrogen Dynamics - (Abstract Only)

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.

SIMULATING LONG-TERM PERFORMANCE OF DRAINAGE WATER MANAGEMENT ACROSS THE MIDWESTERN UNITED STATES - (Peer Reviewed Journal)

Thorp, K.R., Jaynes, D.B., Malone, R.W. 2008. Simulating long-term performance of drainage water management across the midwestern United States. Transactions of the ASABE. 51(3):961-976.

Using RZWQM-DSSAT to Stimulate Drainage Water Management Across the United States Corn Belt - (Abstract Only)

Thorp, K.R., Jaynes, D.B. 2007. Using RZWQM-DSSAT to Stimulate Drainage Water Management Across the United States Corn Belt [CD-ROM]. In: ASA-CSSA-SSSA Annual Meeting Abstracts, Nov. 4-8, 2007, New Orleans, LA.

N uptake effects on N loss in tile drainage as estimated by RZWQM - (Book / Chapter)

Malone, R.W., Ma, L. 2008. N uptake effects on N loss in tile drainage as estimated by RZWQM. In: Ma, L., Bruulsema, T., Ahuja, L., editors. New Advances in Understanding and Quantification of Plant N Uptake. Boca Raton, FL. CRC Press. p. 259-275.

Impact of glyphosate-tolerant soybean and glufosinate-tolerant corn production on herbicide losses in surface runoff - (Peer Reviewed Journal)

Shipitalo, M.J., Malone, R.W., Owens, L.B. 2008. Impact of glyphosate-tolerant soybean and glufosinate-tolerant corn production on herbicide losses in surface runoff. Journal of Environmental Quality. 37:401-408.

System Modeling for Soil and Water Research and Management: Current Status and Needs for the 21st Century - (Peer Reviewed Journal)

Ma, L., Ahuja, L.R., Malone, R.W. 2007. System Modeling for Soil and Water Research and Management: Current Status and Needs for the 21st Century. Transactions of the ASABE. 50(5):1705-1713.

Spectral Procedures Enhance the Analysis of Three Agricultural Time Series - (Abstract Only)

Meek, D.W., Prueger, J.H., Tomer, M.D., Malone, R.W. 2007. Spectral Procedures Enhance the Analysis of Three Agricultural Time Series [abstract]. In: Applied Statistics In Agriculture Conference Proceedings, April 30-May 1, 2007, Manhattan, KS. p. 17.

Simulating long-term effects of nitrogen fertilizer application rates on corn yield and nitrogen dynamics - (Peer Reviewed Journal)

Thorp, K.R., Malone, R.W., Jaynes, D.B. 2007. Simulating long-term effects of nitrogen fertilizer application rates on corn yield and nitrogen dynamics. Transactions of the ASABE. 50(4):1287-1303.

Simulated N Management Effects on Corn Yield and Tile-Drainage Nitrate Loss - (Peer Reviewed Journal)

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 - (Peer Reviewed Journal)

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 - (Peer Reviewed Journal)

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.

Modeling Pesticide Fate and Nonideal Transport From A Slow Release, Pesticide Treated Seed - (Peer Reviewed Journal)

Sabbagh, G.J., Fox, G.A., Ma, L., Malone, R.W., Arthur, E.L., Dyer, D.G. 2007. Modeling Pesticide Fate and Nonideal Transport From A Slow Release, Pesticide Treated Seed. Transactions of the ASABE 50(2):523-532, 2007.

Using RZWQM and Drainmod NII to Simulate Drainage Water Management in Iowa - (Abstract Only)

Thorp, K.R., Jaynes, D.B., Malone, R.W. 2006. Using RZWQM and Drainmod NII to Simulate Drainage Water Management in Iowa [CD-ROM]. In: ASA-CSSA-SSSA Annual Meeting Abstracts, Nov. 12-16, 2006, Indianapolis, IN.

RZWQM Simulation Of Long-Term Crop Production, Water And Nitrogen Balances In Northeast Iowa - (Peer Reviewed Journal)

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 - (Peer Reviewed Journal)

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.

ROLE OF LANDSCAPE AND HYDROLOGIC ATTRIBUTES IN DEVELOPING AND INTERPRETING YIELD CLUSTERS - (Peer Reviewed Journal)

Kanwar, R.S., Bakhsh, A., Malone, R.W. 2007. Role of landscape and hydrologic attributes in developing and interpreting yield clusters. Geoderma. 140:235-246.

APPLICATIONS OF AGRICULTURAL SYSTEM MODELS IN ASSESSING AND MANAGING CONTAMINATION OF THE SOIL-WATER-ATMOSPHERE CONTINUUM IN AGRICULTURE - (Proceedings)

Ahuja, L.R., Ma, L., Saseendran, A., Malone, R.W. 2006. Applications of agricultural system models in assessing and managing contamination of the soil-water-atmosphere continuum in agriculture. International Symposium for the Agricultural Environment. International Symposium for the Agricultural Environment.

RZWQM Simulated Effects Of Crop Rotation, Tillage, And Controlled Drainage On Crop Yield And Nitrate-N Loss In Drain Flow. - (Peer Reviewed Journal)

Ma, L., Malone, R.W., Heilman, P., Jaynes, D.B., Ahuja, L.R., Saseendran, S.A., Kanwar, R.S., Ascough II, J.C. 2007. RZWQM simulated effects of crop rotation, tillage, and controlled drainage on crop yield and nitrate-n loss in drain flow. Geoderma 140(3):260-271. doi:10/1016/j/geoderma.2007.04.010.

SENSITIVITY OF TILE DRAINAGE FLOW AND CROP YIELD ON MEASURED AND CALIBRATED SOIL HYDRAULIC PROPERTIES - (Peer Reviewed Journal)

Ma, L., Malone, R.W., Heilman, P., Ahuja, L.R., Meade, T.G., Anapalli, S.S., Ascough Ii, J.C., Kanwar, R.S. 2007. Sensitivity of tile drainage flow and crop yield on measured and calibrated soil hydraulic properties. Geoderma 140:3(2007) 284-296. Published on-line 5/16/2007. doi:10.1016/j.geoderma.2007.04.012

DECISION SUPPORT FOR NITROGEN MANAGEMENT IN TILE-DRAINED AGRICULTURE 1825 - (Proceedings)

Heilman, P., Malone, R.W., Ma, L., Hatfield, J.L., Ahuja, L.R., Ayen, J., Boyle, K., Kanwar, R. 2006. Decision support for nitrogen management in tile-drained agriculture. In: Voinov, A., Jakeman, A.J., Rizzoli, A.E. (eds). Proceedings of the iEMSs Third Biennial Meeting: "Summit on Environmental Modelling and Software". International Environmental Modelling and Software Society, Burlington, USA, July 2006. CD ROM.

Application of Agricultural System Models in Assessing and Managing Contamination of Soil-Water-Atmosphere Continuum in Agriculture - (Abstract Only)

Ahuja, L.R., Ma, L., Anapalli, S., Malone, R.W. 2006. Application of Agricultural System Models in Assessing and Managing Contamination of Soil-Water-Atmosphere Continuum in Agriculture. International Symposium for the Agricultural Environment. Ghent, Belgium. September 4-6, 2006. (Abstract).

EMPIRICAL MODELING OF NITRATE LOADING AND CROP YIELD FOR CORN-SOYBEAN ROTATIONS IN IOWA - (Abstract Only) - (11-May-06)

DECISION SUPPORT FOR NITROGEN MANAGEMENT IN TILE DRAINED AGRICULTURE 1811 - (Proceedings)

Heilman, P., Malone, R.W., Ma, L., Hatfield, J.L., Ahuja, L.R., Ayen, J., Boyle, K., Kanwar, R. 2006. Decision support for nitrogen management in tile drained agriculture. In: Jakeman, A., Rizzoli, A. (eds). Proceedings of the IEMSs Third Biennial Meeting: "Summit on Environmental Modelling and Software". International Environmental Modelling and Software Society, Burlington, USA, July 2006. CD ROM.

COMPOST EFFECT ON WATER RETENTION AND NATIVE PLANT ESTABLISHMENT ON A CONSTRUCTION EMBANKMENT - (Peer Reviewed Journal)

Singer, J.W., Malone, R.W., Tomer, M.D., Meade, T.G., Welch, J. 2006. Compost effect on water retention and native plant establishment on a construction embankment. Journal of Soil and Water Conservation. 61(5):268-273.

RESIDUAL AND CONTACT HERBICIDE LOSSES IN SURFACE RUNOFF FROM CONSERVATION TILLED WATERSHEDS PLANTED WITH TRANSGENIC, HERBICIDE-TOLERANT, CORN AND SOYBEAN - (Abstract Only) - (01-Jan-06)

MODELS FOR HYDROLOGIC DESIGN OF EVAPOTRANSPIRATION LANDFILL COVERS - (Peer Reviewed Journal)

Hauser, V.L., Gimon, D.M., Bonta, J.V., Howell, T.A., Malone, R.W., Williams, J.R. 2005. Models for hydrologic design of evapotranspiration landfill covers. Journal of Environmental Science and Technology. 39(18):7226-7233.

FIELD SCALE WATER QUALITY MANAGEMENT IN THE US: STATE OF THE ART 2005 1814 - (Abstract Only)

Heilman, P., Ma, L., Malone, R.W. 2005. Field scale water quality management in the us: state of the art 2005. American Water Resources Association Summer Specialty Conference, Institutions for Sustainable Watershed Management: Reconciling Physical and Management Ecology in the Asia-Pacific, Honolulu, Hawaii, June 29, 2005.

MODELING IMPACTS OF CROP ROTATIONS, TILLAGE AND N MANAGEMENT ON CROP PRODUCTIVITY AND WATER QUALITY USING THE RZWQM-DSSAT HYBRID MODEL - (Abstract Only)

Anapalli, S.S., Ma, L., Malone, R.W., Heilman, P., Ahuja, L.R., Kanwar, R.S., Meade, T.G. 2005. Modeling impacts of crop rotations, tillage and N management on crop productivity and water quality using the RZWQM-DSSAT hybrid model. ASA-CSSA-SSSA Annual Meeting, Salt Lake City, UT. Nov. 6-10, 2005.

NITRATE LOSSES IN SUBSURFACE TILE DRAINAGE AS AFFECTED BY TILLAGE, CROP ROTATIONS, AND FERTILIZER MANAGEMENT - (Abstract Only)

Ma, L., Malone, R.W., Saseendran, S.A., Ahuja, L.R., Heilman, P., Kanwar, R.S. 2006. Nitrate losses in subsurface tile drainage as affected by tillage, crop rotations, and fertilizer management. Biological Systems Simulation Group Proceedings. Fort Collins, CO. April 11-13, 2006.

RESIDUAL AND CONTACT HERBICIDE TRANSPORT THROUGH FIELD LYSIMETERS VIA PREFERENTIAL FLOW - (Peer Reviewed Journal)

Malone, R.W., Shipitalo, M.J., Wauchope, R.D., Sumner, H.R. 2004. Residual and contact herbicide transport through field lysimeters via preferential flow. Journal of Environmental Quality. 33:2141-2148.

RELATIONSHIP BETWEEN HERBICIDE CONCENTRATION IN PERCOLATE, PERCOLATE BREAKTHROUGH TIME, AND NUMBER OF ACTIVE MACROPORES - (Peer Reviewed Journal)

Malone, R.W., Shipitalo, M.J., Meek, D.W. 2004. Relationship between herbicide concentration in percolate, percolate breakthrough time, and number of active macropores. Transactions of the ASAE. 47(5):1453-1456.

A GRAPHICAL TOOL FOR WATER QUALITY CONSERVATION PLANNING 1718 - (Proceedings)

Heilman, P., Armendariz, G.A., Ma, L., Malone, R.W. 2004. A graphical tool for water quality conservation planning. Proc. 13th Internat'l. Soil Conservation Org. Conf., Conserving Soil and Water for Soc.: Sharing Solutions, July 2004, Brisbane, Australia, 6 p.

INTERRELATIONSHIP OF MACROPORES AND SUBSURFACE DRAINAGE FOR CONSERVATIVE TRACER AND PESTICIDE TRANSPORT - (Peer Reviewed Journal)

Fox, G.A., Malone, R.W., Sabbagh, G.J., Rojas, K.W. 2004. Interrelationship of macropores and subsurface drainage for conservative tracer and pesticide transport. Journal of Environmental Quality. 33:2281-2289.

ROLE OF MACROPORES IN PESTICIDE TRANSPORT TO GROUNDWATER - (Proceedings)

Malone, R.W., Shipitalo, M.J., Ma, L., Ahuja, L.R., Rojas, K.W., Logsdon, S.D., Weatherington-Rice, J. 2004. Role of macropores in pesticide transport to groundwater. International Workshop on Applications, Enhancements, and Collaborations of ARS RZWQM and GPFARM Models. p. 39-40.

AGRICULTURAL MANAGEMENT EFFECTS ON CROP PRODUCTION AND N LOSSES TO TILE DRAINAGE IN THE NASHUA STUDY: SIMULATION RESULTS WITH RZWQM - (Abstract Only)

Ma, L., Malone, R.W., Heilman, P., Anapalli, S., Ahuja, L.R., Kanwar, R.S. 2004. Agricultural management effects on crop production and n losses to tile drainage in the nashua study: simulation results with rzwqm. International Workshop on applications, enhancements and collaborations of ARS RZWQM and GPFARM. April 20-22, 2004. Fort Collins. pp. 14-15.

SIMULATING LATE SPRING NITROGEN TEST EFFECTS ON N LEACHING AND CROP PRODUCTION - (Abstract Only)

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 - (Abstract Only)

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.

TEST OF THE ROOT ZONE WATER QUALITY MODEL (RZWQM) FOR PREDICTING RUNOFF OF ATRAZINE, ALACHLOR AND FENAMIPHOS SPECIES FROM CONVENTIONAL-TILLAGE CORN MESOPLOTS - (Peer Reviewed Journal)

Ma, Q.L., Wauchope, R.D., Ma, L., Rojas, K.W., Malone, R.W., Ahuja, L.R. 2004. Test of the root zone water quality model (rzwqm) for predicting runoff of atrazine, alachlor and fenamiphos species from conventional-tillage corn mesoplots. Pest Management Science 60:267-276(2004).

PREDICTING YIELD LOSS IN INDETERMINATE SOYBEAN FROM POD DENSITY USING SIMULATED DAMAGE STUDIES - (Peer Reviewed Journal)

SINGER, J.W., MALONE, R.W., MEEK, D.W., DRAKE, D. PREDICTING YIELD LOSS IN INDETERMINATE SOYBEAN FROM POD DENSITY USING SIMULATED DAMAGE STUDIES. AGRONOMY JOURNAL. 2004. V. 96. P. 584-589.

YARD WASTE COMPOST TO ENHANCE SOIL WATER HOLDING CAPACITY IN THE URBAN-RURAL INTERFACE - (Other) - (18-Oct-03)

HERBICIDE LEACHING AS AFFECTED BY MACROPORE FLOW AND WITHIN-STORM RAINFALL INTENSITY VARIATION: A RZWQM SIMULATION - (Peer Reviewed Journal)

Malone, R.W., Weatherington-Ric, J., Shipitalo, M.J., Fausey, N.R., Ma, L., Ahuja, L.R., Wauchope, R.D., Ma, Q. 2004. Herbicide leaching as affected by macropore flow and within-storm rainfall intensity variation: a RZWQM simulation. Pest Management Science. 60:277-285.

APPLICATION OF THE ROOT ZONE WATER QUALITY MODEL (RZWQM) TO PESTICIDE FATE AND TRANSPORT: AN OVERVIEW - (Peer Reviewed Journal)

Malone, R.W., Ahuja, L.R., Ma, L., Wauchope, R.D., Rojas, K.W., Ma, Q. 2004. A review of the root zone water quality model (RZWQM). Pest Management Science. 60:205-221.

RELATIONSHIP BETWEEN HERBICIDE CONCENTRATION IN PERCOLATE, PERCOLATE BREAKTHROUGH TIME, AND NUMBER OF ACTIVE MACROPORES - (Proceedings)

Malone, R.W., Shipitalo, M.J., Meek, D.W. 2003. Relationship between herbicide concentration in percolate, percolate breakthrough time, and number of active macropores. ASAE Annual International Meeting. Paper No. 032179.

MODELING HYDROLOGY, METRIBUZIN DEGRADATION, AND METRIBUZIN TRANSPORT IN MACROPOROUS TILLED AND NO-TILL SILT LOAM SOIL USING RZWQM - (Peer Reviewed Journal)

Malone, R.W., Ma, L., Wauchope, R.D., Ahuja, L.R., Rojas, K.W., Ma, Q., Warner, R., Byers, M. 2004. Modeling hydrology, metribuzin degradation, and metribuzin transport in macroporous tilled and no-till silt loam soil using RZWQM. Pest Management Science. 60:253-266.

TILLAGE EFFECT ON MACROPOROSITY AND HERBICIDE TRANSPORT IN PERCOLATE - (Peer Reviewed Journal)

MALONE, R.W., LOGSDON, S.D., SHIPITALO, M.J., WEATERINGTON-RICE, J., AHUJA, L.R., MA, L. TILLAGE EFFECT ON MACROPOROSITY AND HERBICIDE TRANSPORT IN PERCOLATE. GEODERMA. 2003. v. 116. p. 191-215.

EVALUATION OF RZWQM UNDER VARYING IRRIGATION LEVELS IN EASTERN COLORADO - (Peer Reviewed Journal)

MA, L., NIELSEN, D.C., AHUJA, L.R., MALONE, R.W., ANAPALLI, S.S., ROJAS, K.W., HANSON, J.D., BENJAMIN, J.G. EVALUATION OF RZWQM UNDER VARYING IRRIGATION LEVELS IN EASTERN COLORADO. TRANSACTIONS OF THE AMERICAN SOCIETY OF AGRICULTURAL ENGINEERS. 2002. v. 46. p. 39-49.

A LOW-COST COMPOSITE WATER SAMPLER FOR DRIP AND STREAM FLOW - (Peer Reviewed Journal)

MALONE, R.W., BONTA, J.V., LIGHTELL, D.R. A LOW-COST COMPOSITE WATER SAMPLER FOR DRIP AND STREAM FLOW. APPLIED ENGINEERING IN AGRICULTURE. 2003. v. 19(1). p. 59-61.

PREDICTING THE EFFECTS OF AGRICULTURAL MANAGEMENT PRACTICES ON SUBSURFACE DRAINAGE: TILE FLOW - (Abstract Only)

MALONE, R.W., MA, L., AHUJA, L.R., KANWAR, R.S. PREDICTING THE EFFECTS OF AGRICULTURAL MANAGEMENT PRACTICES ON SUBSURFACE DRAINAGE: TILE FLOW. AMERICAN SOCIETY OF AGRONOMY MEETINGS. 2002. CD-ROM. MADISON, WI.

PREDICTING THE EFFECTS OF AGRICULTURAL MANAGEMENT PRACTICES ON SUBSURFACE DRAINAGE: NITRATE - (Abstract Only)

MA, L., MALONE, R.W., AHUJA, L.R., KANWAR, R.S. PREDICTING THE EFFECTS OF AGRICULTURAL MANAGEMENT PRACTICES ON SUBSURFACE DRAINAGE: NITRATE. AMERICAN SOCIETY OF AGRONOMY MEETINGS. 2002. CD-ROM. MADISON, WI.

A LOW-COST COMPOSITE WATER SAMPLER FOR DRIP AND STREAM FLOW - (Proceedings)

MALONE, R.W., BONTA, J.V., LIGHTELL, D.R. A LOW-COST COMPOSITE WATER SAMPLER FOR DRIP AND STREAM FLOW. ASAE ANNUAL INTERNATIONAL MEETING. 2002. Paper No. 022148.

SEDIMENT CARBON CONCENTRATIONS AND TRANSPORT FROM SMALL WATERSHEDS UNDER VARIOUS CONSERVATION TILLAGE PRACTICES - (Peer Reviewed Journal)

OWENS, L.B., MALONE, R.W., HOTHEM, D.L., STARR, G.C., LAL, R. SEDIMENT CARBON CONCENTRATIONS AND TRANSPORT FROM SMALL WATERSHEDS UNDER VARIOUS CONSERVATION TILLAGE PRACTICES. SOIL & TILLAGE RESEARCH. 2002. v.67. p.65-73.

WATER TRANSPORT MODELING USING RZWQM - (Proceedings) - (01-Aug-01)

EVALUATION OF THE ROOT ZONE WATER QUALITY MODEL (RZWQM) - (Book / Chapter) - (01-Jul-01)

EVAPORATION CHANGES OVER THE CONTIGUOUS UNITED STATES AND FORMER USSR: A REASSESSMENT - (Peer Reviewed Journal) - (01-Jul-01)

CARBON CONCENTRATIONS AND TRANSPORT IN SEDIMENT LEAVING SMALL, CROPPED WATERSHEDS - (Proceedings) - (19-Apr-01)

MACROPORE COMPONENT ASSESSMENT OF THE ROOT ZONE WATER QUALITY MODEL (RZWQM)USING NO-TILL SOIL BLOCKS - (Peer Reviewed Journal) - (23-Mar-01)

COMPARISON OF MODELS FOR ESTIMATION OF GROUNDWATER RECHARGE, USING DATA FROM A DEEP WEIGHING LYSIMETER - (Peer Reviewed Journal) - (15-Nov-00)

PERCOLATE LOSSES OF PRE- AND POST-EMERGENCE HERBICIDES FROM MONOLITH LYSIMETERS IN A CORN-SOYBEAN ROTATION - (Abstract Only) - (05-Nov-00)

RUNOFF LOSSES OF PRE- AND POST-EMERGENCE HERBICIDES FROM WATERSHEDS IN A CORN-SOYBEAN ROTATION - (Abstract Only) - (05-Nov-00)

THE USDA-ARS NORTH APPALACHIAN EXPERIMENTAL WATERSHED - (Abstract Only) - (20-Oct-00)

THE USE OF CONTROL CHARTS TO MONITOR REGRESSIONS PARAMETERS: TWO PRACTICALAPPLICATIONS - (Proceedings) - (10-Sep-00)

SIMULATION OF WATER AND PESTICIDE MOVEMENT THROUGH MACROPORES USING THE ROOT ZONE WATER QUALITY MODEL (RZWQM) - (Abstract Only) - (09-May-00)

ASSESSING HERBICIDE MOVEMENT USING SOIL SAMPLES VERSUS PERCOLATE SAMPLES - (Peer Reviewed Journal) - (15-Feb-00)

COMPARISON OF MODELS FOR ESTIMATION OF GROUNDWATER RECHARGE, USING DATA FROM A DEEP WEIGHING LYSIMETER - (Proceedings) - (06-Dec-99)

ERROR ANALYSIS AND QUALITY IMPROVEMENT OF THE COSHOCTON WEIGHING LYSIMETERS - (Peer Reviewed Journal) - (10-Nov-99)

ASSESSMENT OF THE MACROPORE COMPONENT OF RZWQM - (Abstract Only) - (01-Nov-99)

LYSIMETER STUDY OF NITRATE LEACHING FROM A CORN/SOYBEAN ROTATION - (Peer Reviewed Journal) - (30-Aug-99)

VALIDATION OF THE ROOT ZONE WATER QUALITY MODEL (RZWQM): A REVIEW - (Proceedings) - (18-Jul-99)

CARBON CONCENTRATIONS AND TRANSPORT IN SEDIMENT LEAVING SMALL TILLED WATERSHEDS - (Abstract Only) - (24-May-99)

CONSERVATION TILLAGE EFFECTS ON PREFERENTIAL TRANSPORT OF SEDIMENT-BORNE C AND N FROM WATERSHEDS IN OHIO - (Abstract Only) - (24-May-99)

MODELING SOIL CARBON TRANSPORTED BY WATER EROSION PROCESSES - (Peer Reviewed Journal) - (19-May-99)

CALIBRATION AND QUALITY CONTROL (QC) OF THE COSHOCTON WEIGHING LYSIMETERS - (Peer Reviewed Journal) - (01-Mar-99)

MODELING SOIL CARBON LOSS IN EROSION - (Abstract Only) - (01-Nov-98)

ASSESSING CARBON LOSSES BY EROSION FROM SOIL AND NUTRIENT LOSS ON A WATERSHED SCALE - (Abstract Only) - (01-Nov-98)

ASSESSING CHEMICAL TRANSPORT USING SOIL SAMPLES VERSUS PERCOLATE SAMPLES - (Abstract Only) - (01-Jul-98)

ERROR ANALYSIS AND QUALITY IMPROVEMENT OF THE COSHOCTON WEIGHING LYSIMETERS - (Proceedings) - (15-Jun-98)

MODELING SURFACE AND SUBSURFACE PESTICIDE TRANSPORT UNDER FIELD CONDITIONS USING PRZM-3 AND GLEAMS - (Proceedings) - (11-Aug-97)

NITRATE AND BROMIDE LEACHING FROM LYSIMETERS IN A CORN/SOYBEAN ROTATION - (Abstract Only) - (01-Jul-97)