Projects

OBJECT MODELING AND SCALING OF LANDSCAPE PROCESSES AND CONSERVATION EFFECTS IN AGRICULTURAL SYSTEMS Appropriated (D)   Accession Number: 411543

ENHANCED SYSTEM MODELS AND DECISION SUPPORT TOOLS TO OPTIMIZE WATER LIMITED AGRICULTURE Appropriated (D)   Accession Number: 414564

EXTENSION OF GPFARM-IRRIGATION TO THE COLORADO CORN GROWERS ASSOCIATION / FARM PROFIT Nonfunded Cooperative Agreement (N)   Accession Number: 410808

COOPERATIVE RESEARCH FOR JOINT PROJECTS IN BASIC AND APPLIED RESEARCH HAVING REGIONAL OR NATIONAL APPLICATION Nonfunded Cooperative Agreement (N)   Accession Number: 418393

CONSERVATION EFFECTS ASSESSMENT PROJECT (CEAP)-FORT COLLINS, CO Reimbursable (R)   Accession Number: 412013

THE OBJECT MODELING SYSTEM (OMS): AN ADVANCED COMPUTER FRAMEWORK FOR NATURAL RESOURCES TECHNOLOGY MODELS AND TOOLS Reimbursable (R)   Accession Number: 409370

DEVELOP KNOWLEDGE BASE AND QUANTITATIVE TOOLS FOR OPTIMAL CROPS AND MGMT PRACTICES FOR VARIABLE LTD WATER CONDITIONS IN THE GREAT PLAINS Specific Cooperative Agreement (S)   Accession Number: 413422

DEVELOP, TEST, AND IMPROVE THE NEEDED SCIENCE MODULES AND MODELS OF AGRICULTURAL SYSTEMS IN OMS FOR VARIOUS APPLICATIONS Specific Cooperative Agreement (S)   Accession Number: 413434

APPLICATION OF SYSTEM MODELS TO EVALUATE AND EXTEND CROPPING SYSTEMS STUDIES AT DIFFERENT GREAT PLAINS/NORTHWEST LOCATIONS Specific Cooperative Agreement (S)   Accession Number: 412167

Publications

A Rapid and Cost Effective Method for Soil Carbon Mineralization Under Static Incubations - (Abstract) - (15-Aug-09)

A Step by Step Procedure for Parameterization, Calibration, Validation, and Application of a System Model in Field Research - (Abstract) - (05-Aug-09)

Using Computer Models to Explore Alternative Scenarios for Managing Limited Irrigation Water - (Abstract)

Ahuja, L.R. 2009. Using Computer Models to Explore Alternative Scenarios for Managing Limited Irrigation Water. Natural Resources Research Update (NRRU). Update #244313.

An Exploratory Investigation on the Invasiveness of Environmental Modeling Frameworks - (Proceedings/Symposium)

Lloyd, W., David, O., Ascough II, J.C., Rojas, K.W., Carlson, J.R., Leavesley, G.H., Krause, P., Green, T.R., Ahuja, L.R. 2009. An Exploratory Investigation on the Invasiveness of Environmental Modeling Frameworks. World IMACS Congress and MODSIM09 International Congress on Modelling and Simulation.p. 909-915.

Use of a Cropping System Model for Soil-Specific Optimization of Limited Water - (Proceedings/Symposium)

Ahuja, L.R., Anapalli, S.S., Ma, L., Nielsen, D.C., Trout, T.J., Andales, A.A., Hansen, N.C. 2009. Use of a Cropping System Model for Soil-Specific Optimization of Limited Water. International Conference on Precision Agriculture Abstracts & Proceedings.

Economic Risk Analysis of Experimental Cropping Systems Using the SMART Risk Tool - (Abstract)

Ascough II, J.C., Fathelrahman, E.M., Vandenberg, B.C., Hoag, D., Ahuja, L.R. 2009. Economic Risk Analysis of Experimental Cropping Systems Using the SMART Risk Tool. Meeting Abstract.

A Component-Based Distributed Watershed Model for the USDA CEAP Watershed Assessment Study - (Abstract)

Ascough II, J.C., David, O., Krause, P., Green, T.R., Heathman, G.C., Kralisch, S., Ahuja, L.R. 2009. A Component-Based Distributed Watershed Model for the USDA CEAP Watershed Assessment Study. Meeting Abstract.

Space-Time Dynamics of Soil Water and Process Interactions in Semi-Arid Terrain, Colorado, USA - (Proceedings/Symposium)

Green, T.R., Erskine, R.H., Murphy, M.R., Ma, L., Ascough II, J.C., Mcmaster, G.S., Dunn, G.H., Ahuja, L.R. 2009. Space-Time Dynamics of Soil Water and Process Interactions in Semi-Arid Terrain, Colorado, USA. International Congress on Modeling and Simulation Proceedings. p. 1851-1857.

Modeling Responses of Dryland Spring Triticale, Proso Millet and Foxtail Millet to Initial Soil Water in the High Plains - (Peer Reviewed Journal)

Anapalli, S.S., Nielsen, D.C., Lyon, D.J., Ma, L., Felter, D.G., Baltensperger, D.D., Hoogenboom, G., Ahuja, L.R. 2009. Modeling Responses of Dryland Spring Triticale, Proso Millet and Foxtail Millet to Initial Soil Water in the High Plains. Field Crops Research 113:48-63.

Response of Crops to Limited Water: Understanding and Modeling Water Stress Effects on Plant Growth Processes - (Book/Chapter)

Ahuja, L.R., Reddy, V., Saseendran, S.A., Yu, Q. 2009. Responses of Crops to Limited Water: Understanding and Modeling Water Stress Effects on Plant Growth Processes. Complete Book. Madison, Wisconsin. American Society of Agronomy, Inc., Crop Soil Science Society of America, Inc., Soil Science Society of America, Inc. 436 p.

Synthesis of Papers and Actions and Further Research to Improve Response of Crop System Models to Water Stress - (Book/Chapter)

Ahuja, L.R., Reddy, V., Saseendran, S.A., Yu, Q. 2009. Synthesis of Papers and Actions and Further Research to Improve Response of Crop System Models to Water Stress in Ahuja, R., Reddy, V., Saseendran, S.A., Yu, Q, editors. Response of Crops to Limited Water: Understanding and Modeling Water Stress Effects on Plant Growth Processes. Madison, Wisconsin: American Society of Agronomy, Inc, Crop Soil Science Society of America, Inc., Soil Science Society of America, Inc. p 411-421.

Effects of Estimating Soil Hydraulic Properties and Root Growth Factor on Soil Water Balance and Crop Production - (Peer Reviewed Journal)

Ma, L., Hoogenboom, G., Saseendran, S.A., Bartling, P.N., Ahuja, L.R., Green, T.R. 2009. Effects of Estimating Soil Hydraulic Properties and Root Growth Factor on Soil Water Balance and Crop Production. Agronomy Journal. 101:572-583.

Fractal Analyses of Steady Infiltration and Terrain on an Undulating Agricultural Field - (Peer Reviewed Journal)

Green, T.R., Dunn, G.H., Erskine, R.H., Salas, J.D., Ahuja, L.R. 2009. Fractal Analyses of Steady Infiltration and Terrain on an Undulating Agricultural Field. Vadose Zone Journal. 8(2)310-320.

Evaluating the Crop Water Stress Index and its Correlation with Latent Heat and CO2 Fluxes Over Winter Wheat and Maize in the North China Plain - (Peer Reviewed Journal)

Li, L., Nielsen, D.C., Yu, Q., Ma, L., Ahuja, L.R. 2008. Evaluating the Crop Water Stress Index and its Correlation with Latent Heat and CO2 Fluxes Over Winter Wheat and Maize in the North China Plain. Agricultural Water Management.doi:10.1016/j.agwat.2008.09.015.

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.

Current Water Deficit Stress Simulations in Selected Agricultural System Simulation Models - (Book/Chapter)

Anapalli, S.S., Ahuja, L.R., Ma, L., Timlin, D.J., Stockle, C.O., Boote, K.J., Hoogenboom, G. 2008. Current Water Deficit Stress Simulations in Selected Agricultural System Simulation Models. In: Ahuja, L.R., Reddy, V.R., Saseendran, S.A., Yu, Q., editors. Response of Crops to Limited Water: Understanding and Modeling Water Stress Effects on Plant Growth Processes. Madison, WI, American Society of Agronomy, Crop Science Society of America, Soil Science Society of America. p. 1-38.

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

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.

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.

Modeling Crop Responses to Initial Soil Water in the High Plains - (Abstract)

Saseendran, S.A., Nielsen, D.C., Lyon, D.J., Ma, L., Ahuja, L.R. 2008. Modeling Crop Responses to Initial Soil Water in the High Plains. 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.

Impacts of Cropping Intensity on Soil C and Net Greenhouse Gas Fluxes for Dryland Cropping in Northeastern Colorado - (Proceedings/Symposium)

Del Grosso, S.J., Sherrod, L.A., Mosier, A., Peterson, G.A., Ahuja, L.R., Hansen, N. 2008. Impacts of Cropping Intensity on Soil C and Net Greenhouse Gas Fluxes for Dryland Cropping in Northeastern Colorado. Proceedings Great Plains Soil Fertility Conference. Vol. 12, pp. 40-44.

Use of Crop Simulation Models to Evaluate Limited Irrigation Management Options for Corn in Semi-Arid Environment - (Peer Reviewed Journal)

Anapalli, S.S., Ahuja, L.R., Nielsen, D.C., Trout, T.J., Ma, L. 2008. Use of Crop Simulation Models to Evaluate Limited Irrigation Management Options for Corn in Semi-Arid Environment. Water Resources Research. Water Resources Research, 44,W00E02, doi10.1029/2007WR006181.

Development and Testing of a Terrain-Based Hydrologic Model for Spatial Hortonian Infiltration and Run-Off/on - (Peer Reviewed Journal)

Meng, H., Green, T.R., Salas, J., Ahuja, L.R. 2008. Development and testing of a terrain-based hydrologic model for spatial hortonian infiltration and run-off/on . Environmental Modeling & Software. 23 (6): 794-812.

Ecological Models: Agricultural Models - (Book/Chapter)

Ascough Ii, J.C., Ahuja, L.R., Mcmaster, G.S., Ma, L., Andales, A.A. 2008. Agricultural Models. In: Jorgensen, S.E., Faith, B.D.editors. Ecological Models. Vol. (1) Encyclopedia of Ecology., 5 vols. Oxford, Elsevier. p. 85-95.

Simulated Corn Yield Responses to Limited-Water Irrigation Under Varying Soil and Climate Conditions - (Abstract)

Anapalli, S.S., Ahuja, L.R., Ma, L., Nielsen, D.C., Trout, T.J., Hansen, N., Andales, A.A. 2007. Simulated Corn Yield Responses to Limited-Water Irrigation Under Varying Soil and Climate Conditions. ASA-CSSA-SSSA Annual Meeting Abstracts, New Orleans, LA. November 5,2007, 33-2.

Spatial Variability and Scaling of Infiltration on Undulating Agricultural Terrain - (Abstract)

Green, T.R., Ahuja, L.R., Dunn, G.H., Ascough Ii, J.C., Mcmaster, G.S., Ma, L., Erskine, R.H., Salas, J.D., Palic, D.B., Murphy, M.R. 2007. Spatial Variability and Scaling of Infiltration on Undulating Agricultural Terrain. American Society of Agronomy Meetings New Orleans, November 7,2007 (282-3).

Developing Erosion Prediction Modeling Technology Using the Object Modeling System (OMS): Viability and Challenges - (Abstract)

Ascough Ii, J.C., Flanagan, D.C., David, O., Ahuja, L.R., Rojas, K.W. 2007. Developing Erosion Prediction Modeling Technology Using the Object Modeling System (OMS): Viability and Challenges. American Society of Agronomy Meetings, New Orleans, LA. November 4-8, 2007.

Scaling Parameters of the Lewis-Kostiakov Water Infiltration Equation Across Soil Textural Classes and Extension to Rain Infiltration - (Peer Reviewed Journal)

Ahuja, L.R., Kozak, J.A., Andales, A.A., Ma, L. 2006. Scaling Parameters of the Lewis-Kostiakov Water Infiltration Equation Across Soil Textural Classes and Extension to Rain Infiltration. Transactions of the ASABE. Vol.50(5): 1525-1541.2007.

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.

Energy balance simulation of a wheat canopy using the RZ-SHAW (RZWQM-SHAW) model - (Peer Reviewed Journal)

Yu, Q., Flerchinger, G.N., Xu, S., Kozak, J.A., Ma, L., Ahuja, L.R. 2007. Energy balance simulation of a wheat canopy using the rz-shaw (rzwqm-shaw) model. Trans. of ASABE 50(5): 1507-1516.

Evaluating GPFARM for No-Tillage Dryland Experimental Sites in Eastern Colorado - (Peer Reviewed Journal)

Ascough Ii, J.C., Mcmaster, G.S., Andales, A.A., Hansen, N.C., Ahuja, L.R., Sherrod, L.A. 2007. Evaluating GPFARM for No-Tillage Dryland Experimental Sites in Eastern Colorado. Transactions of the ASABE, 50(5):1565-1578.

Integrating Soil and Crop Research with System Models in the Midwest USA: Purpose and Overview of the Special Issue - (Peer Reviewed Journal)

Ahuja, L.R., Hatfield, J.L. 2007. Integrating Soil and Crop Research with System Models in the Midwest USA: Purpose and Overview of the Special Issue. Geoderma. Vol.140;3. pp 217-222. July 15, 2007. doi:10.1016/j.geoderma.2007.04.006.

Using the RZWQM to Simulate the Fate of Nitrogen in Field Soil - Crop Environment in the Mediterranean Region - (Peer Reviewed Journal)

Cameira, M.R., Fernando, R.M., Ahuja, L.R., Ma, L. 2007. Using the RZWQM to Simulate the Fate of Nitrogen in Field Soil - Crop Environment in the Mediterranean Region. Agricultural Water Management. 90:121-136. 2007.

Whole System Integration and Modeling Essential to Agricultural Science and Technology for the 21st Century - (Peer Reviewed Journal)

Ahuja, L.R., Andales, A.A., Ma, L., Saseendran, S.A. 2007. Whole System Integration and Modeling Essential to Agricultural Science and Technology for the 21st Century. Crop Management. Vol.19, No 1/2, April 2007.

Comparision of modeling approaches to quantify residue architecture effects on soil temperature and water - (Peer Reviewed Journal)

Kozak, J.A., Aiken, R.M., Flerchinger, G.N., Nielsen, D.C., Ma, L., and Ahuja, L.R. 2007, Comparison of modeling approaches to quantify residue architecture effects on soil temperature and water. International Journal of Soil and Tillage Research.95:84-96.

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.

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.

Simulations of Limited-Water Irrigation Management Options for Corn in Dryland Agriculture - (Abstract)

Saseendran, A., Ahuja, L.R., Ma, L., Nielsen, D.C., Dunn, G.H. 2006. Simulations of Limited-Water Irrigation Management Options for Corn in Dryland Agriculture. ASA-CSSA-SSSA Annual Meeting Abstracts. Indianapolis, IN. November 13, 2006.

Gpfarm Evaluation Across a No-Till Dryland Agroecosystem Landscape Catena - (Abstract)

Ascough Ii, J.C., Andales, A.A., Mcmaster, G.S., Ahuja, L.R. 2006. Gpfarm evaluation across a no-till dryland agroecosystem landscape catena. ASA-CSSA-SSSA Annual Meeting Abstracts. Indianapolis, IN. 11/15/2006.

Evaluation of Crop Water Stress Based On Soil Moisture, Evapotranspiration, and Canopy Temperature - (Abstract)

Yu, Q., Xu, S., Ma, L., Ahuja, L.R. 2006. Evaluation of Crop Water Stress Based On Soil Moisture, Evapotranspiration, and Canopy Temperature. ASA-CSSA-SSSA Annual Meeting Abstracts. Indianapolis, IN. November 13, 2006.

Scaling up preferential flow in unsaturated undulating terrain due to anisotropic soil hydraulic conductivity and other potential mechanisms - (Abstract)

Green, T.R., Freyberg, D., Constanz, J., Ahuja, L.R. 2006. Scaling up preferential flow in unsaturated undulating terrain due to anisotropic soil hydraulic conductivity and other potential mechanisms. International Conference on Preferential Flow and Transport Processes in Soil. Zurich, Switzerland. November 7,2006.

Applications of Agricultural System Models in Assessing and Managing Contamination of the Soil-Water-Atmosphere Continuum in Agriculture - (Proceedings/Symposium)

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.

Soil Organic Carbon Pool Changes under Long-Term No-Till and Cropping Intensity Regimes Across An Evapotranspiration Gradient in Eastern Colorado, Usa - (Abstract)

Ma, L., Sherrod, L.A., Peterson, G., Hansen, N., Ahuja, L.R. 2006. Soil organic carbon pool changes under long-term no-till and cropping intensity regimes across an evapotranspiration gradient in Eastern Colorado, USA. International Soil Tillage Research Organization Proceedings. KIel, Germany. 8/28 - 9/3/2006. (Abstract)

Temporally Stable Patterns in Grain Yield and Soil Water on a Dryland Catena - (Peer Reviewed Journal)

Andales, A.A., Green, T.R., Ahuja, L.R., Erskine, R.H., Peterson, G.A. 2007. Temporally stable patterns in grain yield and soil water on a dryland catena. Agricultural Systems 94 (2007) 119-127).

Modeling Effects of Till/no-Till and Surface Crop Residues on Soil Water, Temperature and Energy Balance - (Abstract)

Ahuja, L.R., Anapalli, S.S., Ma, L., Kozak, J.A., Aiken, R.M., Flerchinger, G.N. 2006. Modeling effects of till/no-till and surface crop residues on soil water, temperature and energy balance. International Soil Tillage Research Organization. Kiel, Germany, August 28-September 3, 2006.

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

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.

Strategic and Tactical Prediction of Forage Production in Northern Mixed-Grass Prairie - (Peer Reviewed Journal)

Andales, A.A., Derner, J.D., Ahuja, L.R., Hart, R.H. 2006. Strategic and Tactical Prediction of Forage Production in Northern Mixed-Grass Prairie. Rangeland Ecology and Management. 59 (6): 576-584. doi: 10.2111/06-001R1.1.

Decision Support for Nitrogen Management in Tile-Drained Agriculture 1825 - (Proceedings/Symposium)

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)

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).

Using a Range-Livestock Model to Estimate Maximum Cow-Calf Stocking Rates on a Mixed-Grass Prairie - (Proceedings/Symposium)

Andales, A.A., Ahuja, L.R. 2006. Using a range-livestock model to estimate maximum cow-calf stocking rates on a mixed-grass prairie. ASABE Annual International Meeting. Portland, OR. July 9-12, 2006.

Evaluating Various Water Stress Calculations in RZWQM and RZ-SHAW for Corn and Soybean Production - (Peer Reviewed Journal)

Kozak, J.A., Ma, L., Ahuja, L.R., Flerchinger, G.N., Nielsen, D.C. 2006. Evaluating Various Water Stress Calculations in RZWQM and RZ-SHAW for Corn and Soybean Production. Agronomy Journal 98:1146-1155.

Modeling Spatial-Temporal Soil Water and Overland Flow in a Dryland Wheat-Fallow Field Using Maria-Gis - (Abstract)

Green, T.R., Ascough II, J.C., Erskine, R.H., Vandenberg, B.C., Ahuja, L.R. 2006. Modeling spatial-temporal soil water and overland flow in a dryland wheat-fallow field using maria-gis. World Congress of Soil Science. Philadelphia, PA. 7/9-7/15/2006

Decision Support for Nitrogen Management in Tile Drained Agriculture 1811 - (Proceedings/Symposium)

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.

Applications of a Forage Production Model in Semi-Arid Northern Mixed-Grass Prairie - (Abstract)

Andales, A.A., Derner, J.D., Ahuja, L.R., Hart, R.H. 2006. Applications of a forage production model in semi-arid northern mixed-grass prairie. [Abstract]. 36th Biological Systems Simulation Group Conference, Fort Collins, CO; Apr. 11-13, 2006.

An Improved Agricultural System Model for Space-Time Simulation of Agricultural Landscape Variability - (Abstract)

Ascough II, J.C., Ma, L., Green, T.R., Flerchinger, G.N., Mcmaster, G.S., Ahuja, L.R., Vandenberg, B.C. 2006. An improved agricultural system model for space-time simulation of agricultural landscape variability. World Congress of Soil Science. July 9-15,2006.

Applications of Rzwqm in Agricultural Research for Soil and Water Management - (Abstract)

Ma, L., Ahuja, L.R., Saseendran, S.A. 2006. Applications of rzwqm in agricultural research for soil and water management. World Congress of Soil Science. Philadelphia, PA. 7/09/-7/14/2006.(Abstract).

Key Criteria and Selection of Sensitivity Analysis Methods Applied to Natural Resource Models - (Proceedings/Symposium)

Ascough Ii, J.C., Green, T.R., Ma, L., Ahuja, L.R. 2005. Key criteria and selection of sensitivity analysis methods applied to natural resource models. Modsim 2005 International Congress on Modeling and Simulation, Modeling and Simulation Society of Australia and New Zealand, Melbourne, Australia. December 12-15, 2005. p2463-2469.

Key Criteria and Selection of Sensitivity Analysis Methods Applied to Natural Resource Models - (Proceedings/Symposium)

Ascough Ii, J.C., Green, T.R., Ma, L., Ahuja, L.R. 2005. Key criteria and selection of sensitivity analysis methods applied to natural resource models. International Congress on Modeling and Simulation Proceedings. Salt Lake City, UT, November 6-11,2005.

Producers, Decision Support Systems, and Gpfarm: Lessons Learned from a Decade of Development - (Proceedings/Symposium)

Ascough Ii, J.C., Dunn, G.H., Mcmaster, G.S., Ahuja, L.R., Andales, A.A. 2005. Producers, decision support systems, and gpfarm: lessons learned from a decade of development. International Congress on Modeling and Simulation Proceedings.

Modeling Precision Agriculture for Better Crop Productivity and Environmental Quality - (Peer Reviewed Journal)

Bakhsh, A., Kanwar, R., Jaynes, D.B., Colvin, T.S., Ahuja, L.R. 2005. Modeling precision agriculture for better crop productivity and environmental quality. Asian Association for Agricultural Engineering. 14(4):235-243.

Crop Canopy and Residue Rainfall Interception Effects on Water and Crop Growth - (Peer Reviewed Journal)

Kozak, J.A., Ahuja, L.R., Green, T.R., Ma, L. 2007. Crop canopy and residue rainfall interception effects on water and crop growth. Hydrological Processes. 21:229-241, March 2007.

Crop Canopy and Residue Rainfall Interception Effects on Water and Crop Growth - (Peer Reviewed Journal) - (01-Nov-05)

Modeling a Wheat-Maize Double Cropping System in China Using Two Plant Growth Modules with Rzwqm - (Peer Reviewed Journal)

Yu, Q., Saseendran, S.A., Ma, L., Flerchinger, G.N., Green, T.R., Ahuja, L.R. 2006. Modeling a wheat-maize double cropping system in china using two plant growth modules with rzwqm. Agricultural Systems. 89(2-3):457-477.2006.

Scaling Infiltration and Other Soil Water Processes Across Diverse Soil Textural Classes - (Abstract)

Kozak, J.A., Ahuja, L.R., Green, T.R. 2005. Scaling infiltration and other soil water processes across diverse soil textural classes. American Geophysical Union 2005 Annual Meeting. SanFrancisco, CA. Dec. 7, 2005.

A Dem-Based Watershed Model with Spatial Hortonian Infiltration and Ruh-Off/on - (Abstract)

Meng, H., Green, T.R., Salas, J.D., Ahuja, L.R. 2005. A DEM-based watershed model with spatial hortonian infiltration and ruh-off/on. Trans American Geophysical Union, 86 (52), Fall Meeting Supplement, Abstract H13H-1400.

Evaluating Nitrogen and Water Management of a Double Cropping System in China - (Peer Reviewed Journal)

Hu, C., Saseendran, S.A., Green, T.R., Ma, L., Li, X., Ahuja, L.R. 2006. Evaluating nitrogen and water management of a double cropping system in china. Vadose Zone Journal. 5:493-505.2006.

Modeling the Effect of Russian Wheat Aphid, Diuraphis Noxia (Mordvilko) and Weeds in Winter Wheat As Guide to Management - (Peer Reviewed Journal)

Chander, S., Ahuja, L.R., Peairs, F.B., Aggarwal, P.K., Kalra, N. 2006. Modeling the effect of russian wheat aphid, diuraphis noxia (mordvilko) and weeds in winter wheat as guide to management. Agricultural Systems. Agricultural Systems (Journal) June 2006. 88(2-3):494-513. 2006.

Trans-Disciplianry Soil Physics Research Critical to Synthesis and Modeling of Agricultural Systems - (Peer Reviewed Journal)

Ahuja, L.R., Ma, L., Timlin, D.J. 2006. Trans-disciplianry soil physics research critical to synthesis and modeling of agricultural systems. Soil Science Society of America Journal.70:311-326.2006.

Energy Balance and Water and Heat Transfer Simulated by Shaw and Rz-Shaw - (Abstract)

Yu, Q., Kozak, J.A., Xu, S., Flerchinger, G.N., Ma, L., Ahuja, L.R. 2005. Energy balance and water and heat transfer simulated by shaw and rz-shaw. ASA-CSSA-SSSA Annual 2005 Meeting Abstracts. Salt Lake City, UT. Nov. 6-10, 2005.

Spatial Water Quality Modeling Framework Development Using Arcgis9 - (Proceedings/Symposium)

Ascough II, J.C., Green, T.R., Ahuja, L.R., Ma, L., Vandenberg, B.C. 2005. Spatial water quality modeling framework development using ArcGIS9. Proceedings 05-2082. 2005 ASAE Annual International Meeting, Tampa, FL. July 17-20. http://asae/frymulti.com/techpapers.asp?confid=tfl2005.

Development of a Forage Growth Component in the Object Modeling System - (Abstract)

Andales, A.A., David, O., Ahuja, L.R. 2005. Development of a forage growth component in the object modeling system. American Society of Agricultural Engineers Meetings Papers. 2005 ASAE Annual International Meeting, Tampa, FL, July 17-20, 2005. Paper #053011.2005. Extended Abstract.

Scaling of Kostiakov Infiltration Equation Parameters Across Soil Textural Classes - (Abstract)

Kozak, J.A., Ahuja, L.R. 2005. Scaling of kostiakov infiltration equation parameters across soil textural classes. Soil Science Society of America Annual Meeting.

A New Soil C/n Module to Simulate Denitrification for Groundwater Remediation - (Abstract)

Ma, L., Hunter, W.J., Ahuja, L.R. 2005. A new soil C/N module to simulate denitrification for groundwater remediation. ASA-CSSA-SSSA Annual Meeting Abstracts. Nov. 6-10, 2005. Salt Lake City, UT.

Modeling Impacts of Crop Rotations, Tillage and N Management on Crop Productivity and Water Quality Using the Rzwqm-Dssat Hybrid Model - (Abstract)

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.

Development and Evaluation of the Rzwqm-Cropgro Hybrid Model for Soybean Production - (Peer Reviewed Journal)

Ma, L., Hoogenboom, G., Ahuja, L.R., Nielsen, D.C., Ascough II, J.C. 2005.Development and evaluation of the RZWQM-CROPGRO hybrid model for soybean production. Agronomy Journal. 97:1172-1182.

Simulating the Fate of Water in Field Soil-Crop Environment for Evaluating Management Effects on Water Quality and Crop Production - (Peer Reviewed Journal)

Cameira, M.R., Fernando, R.M., Ahuja, L.R., Pereira, L. 2005. Simulating the fate of water in field soil-crop environment for evaluating management effects on water quality and crop production. Journal of Hydrology. 315: 1-24. December, 2005.

Effectiveness of Rzwqm for Simulating Alternative Great Plains Cropping Systems - (Peer Reviewed Journal)

Saseendran, S.A., Nielsen, D.C., Ma, L., Ahuja, L.R., Vigil, M.F., Benjamin, J.G., Halvorson, A.D. 2005. Effectiveness of RZWQM for simulating alternative Great Plains cropping systems. Agronomy Journal 97:1183-1193.

Effectiveness of Rzwqm for Simulating Alternative Great Plains Cropping Systems - (Proceedings/Symposium)

Anapalli, S.A., Nielsen, D.C., Ma, L., Ahuja, L.R., Vigil, M.F., Benjamin, J.G., Halvorson, A.D. 2005. Effectiveness of RZWQM for simulating alternative great plains cropping systems. Proceedings from the 35th Biological Systems Simulation Conference. April 19-21, 2005. Phoenix, AZ. P. 37-38.

Nitrate Losses in Subsurface Tile Drainage As Affected by Tillage, Crop Rotations, and Fertilizer Management - (Abstract)

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.

Development and Evaluation of the Rzwqm-Ceres-Maize Hybrid Model for Maize Production - (Peer Reviewed Journal)

Ma, L., Hoogenboom, G., Ahuja, L.R., Ascough Ii, J.C., Saseendran, S.A. 2006. Evaluation of the rzwqm-ceres-maize hybrid model for maize production. Agricultural Systems. 87(3): 274-295.

Scaling and Estimation of Evaporation and Transpiration of Water Across Soil Textures - (Peer Reviewed Journal)

Kozak, J.A., Ahuja, L.R., Ma, L., Green, T.R. 2005. Scaling and estimation of evaporation and transpiration of water across soil textures. Vadose Zone Journal. 4:418-427. 2005.

Developing Natural Resource Models Using the Object Modeling System: Feasibility and Challenges - (Peer Reviewed Journal)

Ahuja, L.R., Ascough Ii, J.C., David, O. 2005. Developing natural resource models using the object modeling system: feasibility and challenges. Advances in Geosciences. 3:1-8, 2005.

Evaluation of Gpfarm for Simulation of Forage Production and Cow-Calf Weights. - (Peer Reviewed Journal)

Andales, A.A., Derner, J.D., Bartling, P.N., Ahuja, L.R., Dunn, G.H., Hart, R.H., Hanson, J.D. 2005. Evaluation of GPFARM for simulation of forage production and cow-calf weights. Rangeland Ecology and Management.58:247-255.

Sustainable Dryland Agroecosystem Management - (Experiment Station)

Westfall, D.G., Peterson, G.A., Peairs, F.B., Sherrod, L.A., Poss, D.J., Shaver, T., Larson, K., Thompson, D.L., Ahuja, L.R., Koch, M.D., Walker, C.B. 2004. Sustainable dryland agroecosystem management. Experiment Station Technical Bulletin TB04-05 Nov. 2004.

Modeling Spatial Variability in Agriculture: the Agsimsgis Water Quality Tool - (Abstract)

Ascough Ii, J.C., Green, T.R., Ahuja, L.R., Vandenberg, B.C., Ma, L. 2004. Modeling spatial variability in agriculture: the agsimsgis water quality tool. Meeting Abstract. ESRI Southwest Users Group 2004 conference, Telleride, CO, October 20-22, 2004. www.swuggis.org/swug_2004/abstracts.shtml.

Simulating Planting Date Effects on Corn Production Using Rzwqm and Ceres-Maize - (Peer Reviewed Journal)

Saseendran, S.A., Ma, L., Nielsen, D.C., Vigil, M.F., Ahuja, L.R. 2005. Simulating planting date effects on corn production using RZWQM and CERES-Maize Models. Agronomy Journal. 97:58-71 (2005).

Model Parameters for Agricultural Systems with Nonlinear Process Interations and Spatial Variability - (Abstract)

Green, T.R., Ahuja, L.R., Ascough II, J.C., Ma, L., Erskine, R.H., McMaster, G.S. 2004. Model parameters for agricultural systems with nonlinear process interations and spatial variability. Agronomy Abstracts a04-5627. (CD-ROM). 2004.

Scaling of Infiltration and Redistribution of Water Across Soil Textural Classes - (Abstract)

Ahuja, L.R., Kozak, J.A. 2004. Scaling of infiltration and redistribution of water across soil textural classes. ASA-CSSA-SSSA Annual Meeting Abstracts. Seattle, WA. 10/31-11/4,2004.

Role of Macropores in Pesticide Transport to Groundwater - (Proceedings/Symposium)

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)

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.

Modeling the Fate of Acetochlor and Terbuthylazine in the Field Using the Root Zone Water Quality Model - (Peer Reviewed Journal)

Ma, Q.L., Rahman, A., James, T.K., Holland, P.T., McNaughton, D.E., Rojas, K.W., Ahuja, L.R. 2004. Modeling the fate of acetochlor and terbuthylazine in the field using the Root Zone Water Quality Model. Soil Science Society of America Journal.68:1491-1500.

Agricultural System Models in Field Research and Technology Transfer - (Proceedings/Symposium)

Ahuja, L.R., Ma, L., Andales, A.A., Saseendran, S.A. 2004. Agricultural system models in field research and technology transfer. Second International Agronomy Congress Proceedings. Punjab Singh, I.P.S. Ahlawat and R.C. Gautam (eds.) Indian Society of Agronomy. pp. 226-233.

Modeling Alternative Cropping Systems for Central Great Plains Using Rzwqm - (Proceedings/Symposium)

Anapalli, S.S., Nielsen, D.C., Ma, L., Ahuja, L.R., Vigil, M.F., Benjamin, J.G. 2004. Modeling alternative cropping systems for central great plains using RZWQM. Proceedings of the International Workshop on Applications, Enhancements and Collaborations of ARS RZWQM and GPFARM Models. April 20-22, 2004. p.22-23.

Using Rzwqm to Simulate Water, Nitrogen, and Planting Date Effects on Corn, Soybean, and Winter Wheat Production in Northeast Colorado - (Proceedings/Symposium)

Nielsen, D.C., Ma, L., Anapalli, S., Ahuja, L.R. 2004. Using RZWQM to simulate water, nitrogen, and planting date effects on corn, soybean, and winter wheat production in Northeast Colorado. International Workshop on Application, Enhancements and Collaborations of ARS RZQWM Models, Fort Collins, CO, April 20-22, 2004. p. 24-25.

Model Parameterization at Different Scales: How Do We Estimate and Incorporate Spatial Information? - (Abstract)

Green, T.R., Ascough Ii, J.C., Ahuja, L.R., Ma, L., Erskine, R.H. 2004. Model parameterization at different scales: how do we estimate and incorporate spatial information?. Intl. Workshop on Applications, Enhancements and Collaboration of ARS RZWQM and GPFARM Models, April 20-22, 2004, Fort Collins, CO.

The Future of Spatial Modeling at Gpsru - (Abstract)

Ascough Ii, J.C., Green, T.R., Ahuja, L.R., Mcmaster, G.S., Ma, L. 2004. The future of spatial modeling at GPSRU. Workshop Proceedings. Intl. Workshop on Applications, Enhancements, and Collaboration of ARS RZWQM and GPSFARM Models, April 20 - 22, 2004, Fort Collins, CO.

Space-Time Modeling of Agricultural Landscape Variability Using Agsimgis - (Proceedings/Symposium)

Ascough Ii, J.C., Green, T.R., Cipra, J.E., Ahuja, L.R., Ma, L. 2004. Space-time modeling of agricultural landscape variability using agsimgis. Annual Hydrology Days Conference Proceedings. March 10-12, 2004. Fort Collins, CO. pp. 10-21.

Scaling of Infiltration and Redistribution of Water Across Soil Textural Classes - (Peer Reviewed Journal)

Kozak, J.A., Ahuja, L.R. 2005. Scaling of infiltration and redistribution of water across soil textural classes. Soil Science Society of America Journal. 69:816-827.

Simple Parametric Methods to Estimate Soil Water Retention and Hydraulic Conductivity - (Book/Chapter)

Timlin, D.J., Williams, R.D., Ahuja, L.R., Heathman, G.C. 2004. Simple parametric methods to estimate soil water retention and hydraulic conductivity. In: Development of Pedotransfer Functions in Soil Hydrology. Pachepsky, Y. and Rawls, W., editors. Amsterdam: Elsevier. 30:71-93.

Developing Natural Resource Models Using the Object Modeling System: Feasibility and Challenges - (Proceedings/Symposium)

Ahuja, L.R., David, O., Ascough Ii, J.C. 2004. Developing natural resource models using the object modeling system: feasibility and challenges. Meeting Proceedings. International Environmental Modelling and Software Society (IEMSS) 2004 Conference - Complexity and Integrated Resources Management, Osnabruck, Germany. June 14-17, 2004.

Carbon Budget in Dryland Agroecosystems after 12 Years in No-Till As Affected by Climate Gradient, Slope Position, and Cropping Intensity - (Proceedings/Symposium)

Sherrod, L.A., Peterson, G.A., Westfall, D.G., Ahuja, L.R. 2004. Carbon budget in dryland agroecosystems after 12 years in no-till as affected by climate gradient, slope position, and cropping intensity. Great Plains Fertility Conf. Proceedings. Denver, CO. March 2-3, 2004. pp. 234-239.

Book Review: Mathematical Modeling for System Analysis in Agricultural Research by Karel D. Vohnout - (Literature)

Ma, L., Ahuja, L.R. 2004. Book review: mathematical modeling for system analysis in agricultural research by karel d. vohnout. Agricultural Systems. Vol 81, pp. 273-274.

Using Rzwqm to Predict Herbicide Leaching Losses in Subsurface Drainage Water - (Peer Reviewed Journal)

Bakhsh, A., Ma, L., Ahuja, L.R., Hatfield, J.L., Kanwar, R.S. 2004. Using rzwqm to predict herbicide leaching losses in subsurface drainage water. Agricultural Systems. Vol 47(5):1415-1426. 2004.

Terrain-Based Scaling and Simulation of Cropping Systems - (Abstract)

Green, T.R., Erskine, R.H., Ascough Ii, J.C., Ahuja, L.R., Salas, J.D., Martinez, A. 2003. Terrain-based scaling and simulation of cropping systems. Meeting Proceedings. Integrative Modelling of Sustanable Land Use, ETH Zurich, Nov 24-25, 2003.

Simulating Late Spring Nitrogen Test Effects on N Leaching and Crop Production - (Abstract)

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)

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).

Spatial and Temporal Correlations among Dryland Grain Yeild and Soil-Water Content in a Sloping Field - (Abstract)

Andales, A.A., Ahuja, L.R., Green, T.R., Erskine, R.H., Peterson, G. 2003. Spatial and temporal correlations among dryland grain yeild and soil-water content in a sloping field. Agronomy Abstracts. Amer. Soc. of Agronomy, Denver, CO. Nov. 2-6, 2003.

Soil Organic Carbon Pools after 12 Years in No-Till Dryland Agroecosystems - (Peer Reviewed Journal)

Sherrod, L.A., Peterson, G.A., Westfall, D.G., Ahuja, L.R. 2005. Soil organic carbon pools after 12 years in no-till dryland agroecosystems. Soil Science Society of America Journal. Vol. 69:1600-1608. 2005.

Application of Gpfarm to Simulate Forage Production and Cow-Calf Weights - (Abstract)

Andales, A.A., Derner, J.D., Bartling, P.N., Ahuja, L.R., Dunn, G.H., Hart, R.H. 2004. Application of gpfarm to simulate forage production and cow-calf weights. Society for Range Management Meeting Abstracts. No. 5.

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.

Soil Organic Carbon Pools after 12 Years in No-Till Agroecosystem As Impacted by Cropping Intensity - (Abstract)

Sherrod, L.A., Peterson, G.A., Westfall, D.G., Ahuja, L.R. 2003. Soil organic carbon pools after 12 years in no-till agroecosystem as impacted by cropping intensity. Meeting Abstract. Amer. Soc. of Agronomy. Nov. 2-6, 2003. Denver, CO.

Evaluation of Gpfarm for Dryland Cropping Systems in Eastern Colorado - (Peer Reviewed Journal)

Andales, A.A., Ahuja, L.R., Peterson, G.A. 2003. Evaluation of gpfarm for dryland cropping systems in eastern colorado. Agronomy Journal. Vol. 95, pp. 1510-1524.

Special Issue: Quantifying Agricultural Management Effects on Soil Properties and Processes - (Book/Chapter)

Ahuja, L.R. 2003. Special issue: quantifying agricultural management effects on soil properties and processes. Geoderma, Special Issue. Vol. 116, No. 1-2, pp. 1-248.

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.

Book Review: Crop-Soil Simulation Models: Applications in Developing Countries - (Literature)

Saseendran, S.A., Ahuja, L.R., Ma, L. 2003. Book review: crop-soil simulation models: applications in developing countries. Journal of Environmental Quality. Vol 32, pp. 2445-2446.

Assimilation of Surface Soil Moisture to Estimate Profile Soil Water Content: a Field and Modeling Experiment - (Peer Reviewed Journal)

Heathman, G.C., Starks, P.J., Ahuja, L.R., Jackson, T.J. 2003. Assimilation of surface soil moisture to estimate profile soil water content. Journal of Hydrology. 279:1-17.

Cropping Intensity Enhances Soil Organic Carbon and Nitrogen in a No-Till Agroecosystem - (Peer Reviewed Journal)

Sherrod, L.A., Peterson, G.A., Westfall, D.G., Ahuja, L.R. 2003. Cropping intensity enhances soil organic carbon and nitrogen in a no-till agroecosystem. Soil Science Society of America Journal. Vol 67, pp 1533-1543.

Modeling Nitrogen Management Effects on Winter Wheat Production Using Rzwqm and Ceres-Wheat - (Peer Reviewed Journal)

Saseendran, S.A., Nielsen, D.C., Ma, L., Ahuja, L.R., Halvorson, A.D. 2003. Modeling nitrogen management effects on winter wheat production using RZWQM and CERES-Wheat. Agronomy Journal 96:615-630.

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.

Scaling and Estimating the Soil Water Characteristic Using a One-Parameter Model. - (Book/Chapter)

WILLIAMS, R.D., AHUJA, L.R. SCALING AND ESTIMATING THE SOIL WATER CHARACTERISTIC USING A ONE-PARAMETER MODEL. CRC PRESS, BOCA RATON, FL. SCALING METHODS IN SOIL PHYSICS. 2003. P. 35-40.

Predicting the Effects of Agricultural Management Practices on Subsurface Drainage: Nitrate - (Abstract)

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.

Predicting the Effects of Agricultural Management Practices on Subsurface Drainage: Tile Flow - (Abstract)

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.

Software for Pest-Management Science: Computer Models and Databases from the United States Department of Agriculture - Agricultural Research Service - (Peer Reviewed Journal) - (12-Nov-02)

Quantifying Agricultural Management Effects on Soil Properties and Processes - (Peer Reviewed Journal)

Ahuja, L.R. 2003. Quantifying agricultural management effects on soil properties and processes. Geoderma Special Issue. Vol. 116, pp. 1-2. 2003.

Gpfarm Cycling of Crop Residues - (Abstract)

Shaffer, M.J., Bartling, P.N., Vigil, M.F., Mcmaster, G.S., Dunn, G.H., Ascough Ii, J.C., Ahuja, L.R. 2002. Gpfarm cycling of crop residues. American Society of Agronomy Meetings. Indianapolis, IN. November 10-14, 2002.

Advances and Challenges in Predicting Agricultural Management Effects on Soil Hydraulic Properties - (Peer Reviewed Journal)

GREEN, T.R., AHUJA, L.R., BENJAMIN, J.G. ADVANCES AND CHALLENGES IN PREDICTING AGRICULTURAL MANAGEMENT EFFECTS ON SOIL HYDRAULIC PROPERTIES. GEODERMA. 2003. Vol. 116, pp. 3-27.

Use of Limited Soil Property Data and Modeling to Estimate Root Zone Soil Water Content. - (Peer Reviewed Journal)

STARKS, P.J., HEATHMAN, G.C., AHUJA, L.R., MA, L. USE OF LIMITED SOIL PROPERTY DATA AND MODELING TO ESTIMATE ROOT ZONE SOIL WATER CONTENT.. JOURNAL OF HYDROLOGY. 2003. v. 272 p. 131-147.

Parameterizing Gpfarm: An Agricultural Decision Support System for Integrating Science, Economics, Resource Use, and Environmental Impacts - (Proceedings/Symposium)

Mcmaster, G.S., Ascough Ii, J.C., Shaffer, M.J., Byrne, P.F., Haley, S.D., Nielsen, D.C., Andales, A.A., Dunn, G.H., Weltz, M.A., Ahuja, L.R. 2002. Parameterizing gpfarm: an agricultural decision support system for integrating science, economics, resource use, and environmental impacts. International Society of Ecological Modeling Annual Meetings. IN: A.E. Rizzoli and A.J. Jakeman (Eds.), Integrated Assessment and Decision Support Proceedings of the 1st Biennial Meeting of the IEMSS. June 24-27, 2002, Lugano, Switzerland. Vol. 1, pg 72-77.

Software for Pest Management Science: Computer Models and Databases from the Us Department of Agriculture-Agricultural Research Service - (Peer Reviewed Journal)

Wauchope, R.D., Ahuja, L.R., Arnold, J.G., Bigner, R., Lowrance, R.R., Adams, L.D. 2002. Software for pest management science: computer models and databases from the us department of agriculture-agricultural research service. Pest Management Science. 59:691-698(2002).

Software for Pest Management Science: Computer Models and Databases from the Us Department of Agriculture-Agricultural Research Service - (Peer Reviewed Journal)

Wauchope, R.D., Ahuja, L.R., Arnold, J.G., Bigner, R., Lowrance, R.R., Van Genuchten, M.T., Adams, L.D. 2002. Software for pest management science: computer models and databases from the us department of agriculture-agricultural research service. Pest Management Science. 59:691-698 (2003).

Topographic Analysis, Scaling and Models to Evaluate Spatial/temporal Variability of Landscape Processes and Management - (Book/Chapter)

Ahuja, L.R., Green, T.R., Erskine, R.H., Ma, L., Ascough Ii, J.C., Dunn, G.H., Shaffer, M.J., Martinez, A. 2002. Topographic analysis, scaling and models to evaluate spatial/temporal variability of landscape processes and management. CRC Book: Agricultural Sys Models in Field Research and Technology Transfer. April 2002. Chapter 13, pp 265-272.

Evaluation of Root Zone Water Quality Model for Simulation of Nonpoint Source Pollution from Agricultural Lands - (Proceedings/Symposium)

BAKHSH, A., HATFIELD, J.L., KANWAR, R.S., MA, L., AHUJA, L.R. EVALUATION OF ROOT ZONE WATER QUALITY MODEL FOR SIMULATION OF NONPOINT SOURCE POLLUTION FROM AGRICULTURAL LANDS. ASAE ANNUAL INTERNATIONAL MEETING. 2001. CD-ROM. MADISON, WI.

Cropping Intensification in Dryland Systems Improves Soil Physical Properties: Regression Relations - (Abstract)

Perterson, G.A., Shaver, T.M., Sherrod, L.A., Ahuja, L.R. 2002. Cropping intensification in dryland systems improves soil physical properties: regression relations. ASA-CSSA-SSSA Proceedings.

Surfaces Soil Physical Properties after Twelve Years of Dryland No-Till Management - (Peer Reviewed Journal)

Shaver, T.M., Peterson, G.A., Ahuja, L.R., Westfall, D.G., Sherrod, L.A., Dunn, G.H. 2002. Surfaces soil physical properties after twelve years of dryland no-till management. Soil Science Society of America Journal. (2002) 66:1296-1303.

Simulated Rangeland Production and Carbon Sequestration - (Other)

Hanson, J.D., M.J. Shaffer, and L.R. Ahuja. Simulating Rangeland Production and Carbon Sequestration. pgs. 345-370 IN: Follett, Kimble and Lal (eds.), The Potential of U.S. Grazing Lands to Sequester Carbon and Mitigate the Greenhouse Effect. 2000. (Invited Book Chapter_