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United States Department of Agriculture

Agricultural Research Service

Related Topics

Liwang Ma
Plains Area
Soil Science

Phone: (970) 492-7339
Fax: (970) 492-7310
Room 2038

USDA-ARS-NPA-ASRU
2150 CENTRE AVE., BLDG. D, STE. 200
FORT COLLINS , CO 80526

Projects
Modeling Soil and Soil-plant Interaction Responses to Wind and Extreme Precipitation and Temperature Events under Different Management Strategies
In-House Appropriated (D)
  Accession Number: 430083
ENHANCED SYSTEM MODELS, MANAGEMENT AND CULTIVAR ADAPTATIONS TO LIMITED WATER AND CLIMATE CHANGE, AND TOOLS FOR PRECISION MANAGEMENT
Non-Assistance Cooperative Agreement (S)
  Accession Number: 423436
Inter-Compare and Improve Soil-Crop Models for Evaluating Effects of Climate Change and Adaptations on Production and Natural Resources
Non-Assistance Cooperative Agreement (S)
  Accession Number: 427157

Publications (Clicking on the reprint icon Reprint Icon will take you to the publication reprint.)
Modeling yield and biomass responses of maize cultivars to climate change under full and deficit irrigation -
Ma, L., Ahuja, L.R., Islam, A., Trout, T.J., Anapalli, S.S., Malone, R.W. 2016. Modeling yield and biomass responses of maize cultivars to climate change under full and deficit irrigation. Agricultural Water Management. 180:88-98.
Climate optimized planting windows for cotton in the lower Mississippi Delta region -
Anapalli, S.S., Pettigrew, W.T., Reddy, K.N., Ma, L., Fisher, D.K., Sui, R. 2016. Climate optimized planting windows for cotton in the lower Mississippi Delta region. Agronomy Journal. 6(4):1-15.
Simulating N2O emissions in different tillage systems of irrigated corn using RZ-Shaw model -
Simulation of crop evapotranspiration and crop coefficient with data in weighing lysimeters -
Anapalli, S.S., Ahuja, L.R., Gowda, P., Ma, L., Marek, G.W., Evett, S.R., Howell, T.A. 2016. Simulation of crop evapotranspiration and crop coefficient with data in weighing lysimeters. Agricultural Water Management. 177:274-283.
Simulating maize production, water and surface energy balance, and canopy temperature under full and deficit irrigation -
Qi, Z., Ma, L., Bausch, W.C., Trout, T.J., Ahuja, L.R., Flerchinger, G.N., Fang, Q. 2016. Simulating maize production, water and surface energy balance, and canopy temperature under full and deficit irrigation. Transactions of the ASABE. 59:623-633.
Simulating maize yield and biomass with spatial variability of soil field capacity -
Ma, L., Ahuja, L.R., Trout, T., Nolan, B.T., Malone, R.W. 2015. Simulating maize yield and biomass with spatial variability of soil field capacity. Agronomy Journal. 108:171-184.
Simulating the fate of fall- and spring-applied poultry litter nitrogen in corn production -
Feng, G.G., Tewolde, H., Ma, L., Adeli, A., Sistani, K.R., Jenkins, J.N. 2015. Simulating the fate of fall- and spring-applied poultry litter nitrogen in corn production. Soil Science Society of America Journal. 79:1804-1814.
Corn stover harvest increases herbicide movement to subsurface drains – Root Zone Water Quality Model simulations -
Shipitalo, M.J., Malone, R.W., Ma, L., Nolan, B.T., Kanwar, R.S., Shaner, D.L., Pederson, C.H. 2015. Corn stover harvest increases herbicide movement to subsurface drains – Root Zone Water Quality Model simulations. Pest Management Science. 72:1124-1132. doi: 10.1002/ps.4087.
Evaluating four N2O emission algorithms in RZWQM2 in response to N rate on an irrigated corn field -
Fang, Q., Ma, L., Halvorson, A.D., Malone, R.W., Ahuja, L.R., Del Grosso, S.J. 2015. Evaluating four N2O emission algorithms in RZWQM2 in response to N rate on an irrigated corn field. Journal of Environmental Modeling and Software. 72:56-70. doi:10.1016/j.envsoft.2015.06.005.
Quantifying crop water stress factors from soil water measurements in a limited irrigation experiment -
Anapalli, S.S., Trout, T.J., Ahuja, L.R., Ma, L., Mcmaster, G.S., Andales, A.A., Chavez, J.L., Ham, J. 2014. Quantifying crop water stress factors from soil water measurements in a limited irrigation experiment. Agricultural Systems. doi: org/10.1016/j.agsy.2014.11.005.
Syntheses of the current model applications for managing water and needs for experimental data and model improvements to enhance these applications -
Ahuja, L.R., Ma, L., Lascano, R.J., Anapalli, S., Fang, Q.X., Nielsen, D.C., Wang, E., Colaizzi, P.D. 2014. Syntheses of the current model applications for managing water and needs for experimental data and model improvements to enhance these applications. Advances in Agricultural Systems Modeling. pp. 399-437.
Developing and normalizing average corn crop water production functions across years and locations using a system model -
Anapalli, S.S., Ahuja, L.R., Ma, L., Trout, T.J., McMaster, G.S., Nielsen, D.C., Andales, A.A., Halvorson, A.D., Chavez, J., Ham, J.M., Fang, Q.X. 2014. Developing and normalizing average corn crop water production functions across years and locations using a system model. Agricultural Water Management. 157: 65-77. DOI: 10.1016/j.agwat.2014.09.002.
Quantifying corn yield and water use efficiency in response to growth-stage based irrigation scheduling and seasonal water availability -
Fang, Q.X., Ma, L., Nielsen, D.C., Trout, T.J., Ahuja, L.R. 2014. Quantifying corn yield and water use efficiency in response to growth-stage based irrigation scheduling and seasonal water availability. Advances in Agricultural Systems Modeling. doi: 10.2134/advagricsystmodel5.c1.
Data worth and prediction uncertainty for pesticide transport and fate models in Nebraska and Maryland, United States -
Nolan, B.T., Malone, R.W., Barbash, J., Ma, L., Shaner, D.L. 2015. Data worth and prediction uncertainty for pesticide transport and fate models in Nebraska and Maryland, United States. Pest Management Science. 71:972-985.
Evaluation of RZWQ2 model and management of poultry litter as corn nitrogen source in the mid-southern United States -
Feng, G.G., Tewolde, H., Ma, L., Sistani, K.R., Jenkins, J.N. 2014. Evaluation of RZWQ2 model and management of poultry litter as corn nitrogen source in the mid-southern United States. Agronomy Abstracts. CD-ROM.
Modeling the effects of irrigation frequencies, initial water and nitrogen on corn yield responses for best management -
Anapalli, S.S., Ahuja, L.R., Ma, L., Trout, T.J. 2014. Modeling the effects of irrigation frequencies, initial water and nitrogen on corn yield responses for best management. Advances in Agricultural Systems Modeling. pp 26-52.
Modeling weather and stocking rate threshold effects on forage and steer production in northern mixed-grass prairie Reprint Icon -
Fang, Q.X., Andales, A.A., Derner, J.D., Ahuja, L.R., Ma, L., Bartling, P.N., Reeves, J.L. 2014. Modeling weather and stocking rate threshold effects on forage and steer production in northern mixed-grass prairie. Agricultural Systems. 129:103-114.
Modeling evapotranspiration and energy balance in a wheat-maize cropping system using the revised RZ-SHAW model -
Fang, Q., Ma, L., Flerchinger, G.N., Qi, Z., Ahuja, L.R., Xing, H., Li, J., Yu, Q. 2014. Modeling evapotranspiration and energy balance in a wheat-maize cropping system using the revised RZ-SHAW model. Agriculture and Forest Meterology. 194:218-229.
Sustainability and environmental assessment of fertigation in an intensive olive grove under Mediterranean conditions -
Cameira, M.R., Pereira, A., Ahuja, L.R., Ma, L. 2014. Sustainability and environmental assessment of fertigation in an intensive olive grove under Mediterranean conditions. Agricultural Water Management. 146:346–360.
Modeling the long-term effect of winter cover crops on nitrate transport in artificially drained fields across the Midwest U.S. -
Cover crops in the upper midwestern United States: Simulated effect on nitrate leaching with artificial drainage -
Malone, R.W., Jaynes, D.B., Kaspar, T.C., Thorp, K.R., Kladivko, E.J., Ma, L., James, D.E., Singer, J.W., Morin, X.K., Searchinger, T.D. 2014. Cover crops in the upper midwestern United States: Simulated effect on nitrate leaching with artificial drainage. Journal of Soil and Water Conservation. 69:292-305.
Effects of tillage and application rate on atrazine transport to subsurface drainage: Evaluation of RZWQM using a six-year field study Reprint Icon -
Malone, R.W., Nolan, B.T., Ma, L., Kanwar, R., Peterson, C., Heilman, P. 2013. Tillage and application rate affects atrazine transport to subsurface drainage with macropore flow: Evaluation of RZWQM using a long-term field study. Agricultural Water Management. 132:10-22.
Enhancing the water stress factors for simulation of corn (Zea mays L.) in RZWQM2 -
Anapalli, S.S., Ahuja, L.R., Ma, L., Nielsen, D.C., Trout, T.J., Andales, A.A., Chavez, J.L., Ham, J. 2013. Enhancing the water stress factors for simulation of corn (Zea mays L.) in RZWQM2. Agronomy Journal. 10:2134.
Quantifying climate and management effects on regional crop yield and N leaching in the North China Plain -
Fang, Q.X., Ma, L., Yu, Q., Hu, C.S., Li, X.X., Malone, R.W., Ahuja, L.R. 2013. Quantifying climate and management effects on regional crop yield and N leaching in the North China Plain. Journal of Environmental Quality. 42:1466–1479.
Modeling The effect of elevated CO2 and climate change on reference evapotranspiration in the semi-arid Great Plains -
Simulating dryland water availability and spring wheat production under various management practices in the Northern Great Plains -
Qi, Z., Bartling, P.N., Jabro, J.D., Lenssen, A.W., Iversen, W.M., Ahuja, L.R., Ma, L., Allen, B.L., Evans, R.G. 2013. Simulating dryland water availability and spring wheat production under various management practices in the Northern Great Plains. Agronomy Journal. 105:37-50.
Simulated yield and profitability of five potential crops for intensifying the dryland wheat-fallow production system -
Anapalli, S., Nielsen, D.C., Ahuja, L.R., Ma, L., Lyon, D.J. 2012. Simulated yield and profitability of five potential crops for intensifying the dryland wheat-fallow production system. Agricultural Water Management. 116(2013):175-192.
Simulation of over-winter soil water and soil temperature with SHAW and RZ-SHAW -
Li, Z., Ma, L., Flerchinger, G.N., Ahuja, L.R., Wang, H. 2012. Simulation of over-winter soil water and soil temperature with SHAW and RZ-SHAW. Soil Science Society of America Journal. 76:1548-1563.
Root Zone Water Quality Model (RZWQM2): Model use, calibration, and validation -
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 production potential of dryland spring canola in the Central Great Plains -
Nielsen, D.C., Saseendran, S.A., Ma, L., Ahuja, L.R. 2012. Simulating the production potential of dryland spring canola in the Central Great Plains. Agronomy Journal. 104:1182-1188.
The Nashua agronomic, water quality, and economic dataset -
Heilman, P., Kanwar, R., Malone, R.W., Ma, L., Hatfield, J.L., Boyle, K. 2012. The Nashua agronomic, water quality, and economic dataset. Journal of Soil and Water Conservation. 67(6):502-512.
Assessment of agricultural return flows under changing climate and crop water management -
Green, T.R., Ma, L., Anapalli, S., Ahuja, L.R., Trout, T.J. 2012. Assessment of agricultural return flows under changing climate and crop water management. Proceedings Solutions International Association of Hydrogeologists. Niagara Falls, Ontario, Canada, September 16-21.
Modeling the impacts of climate change on irrigated corn production in the central Great Plains -
Islam, A., Ahuja, L.R., Garcia, L.A., Ma, L., Anapalli, S.A., Trout, T.J. 2012. Modeling the impacts of climate change on irrigated corn production in the central Great Plains. Agricultural Water Management. 110:94-108.
Development and evaluation of the carbon-nitrogen cycle module for the GPFARM-Range model -
Qi, Z., Bartling, P.N., Ahuja, L.R., Derner, J.D., Dunn, G.H., Ma, L. 2012. Development and evaluation of the carbon-nitrogen cycle module for the GPFARM-Range model. Computers and Electronics in Agriculture. 83:1-10.
Simulating the surface energy balance in a soybean canopy with SHAW and RZ-SHAW models -
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 -
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 -
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.
A synthesis of current parameterization approaches and needs for further improvements -
Ahuja, L.R., Ma, L. 2011. A synthesis of current parameterization approaches and needs for further improvements. In: Ahuja, L.R., Ma, L., editors. Methods of Introducing System Models into Agricultural Research. Madison, WI: American Society of Agronomy, Crop Science Society of America, Soil Science Society of America. p.427-440.
Modeling the effects of controlled drainage, N rate and weather on nitrate loss to subsurface drainage -
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 -
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 -
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 application rates using RZWQM2 -
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 application rates using RZWQM2. Journal of Environmental Quality. 41(1):289-295.
Climate change impacts on dryland cropping systems in the central Great Plains, USA -
Ko, J., Ahuja, L.R., Anapalli, S., Green, T.R., Ma, L., Nielsen, D.C., Walthall, C.L. 2011. Climate change impacts on dryland cropping systems in the central Great Plains, USA. Climatic Change. 111:445-472.
Cover crop effects on nitrogen load in tile drainage from Walnut Creek Iowa using root zone water quality model (RZWQM) -
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 -
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 -
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.
Measurement of surface energy balance components in dryland wheat/fallow and limited-irrigation corn -
Green, T.R., Saseendran, S.A., Erskine, R.H., Ahuja, L.R., Murphy, M.R., Ma, L., Bausch, W.C., Andales, A.A. 2011. Measurement of surface energy balance components in dryland wheat/fallow and limited-irrigation corn. Annual American Geophysical Union Hydrology Days. Paper No. 11.
Quasi-biennial corn yield cycles in Iowa -
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.
Adapting CROPGRO for Simulating Spring Canola Growth with Both RZWQM2 and DSSAT 4.0 -
Saseendran, S.A., Nielsen, D.C., Ma, L., Ahuja, L.R. 2010. Adapting CROPGRO for Simulating Spring Canola Growth with Both RZWQM2 and DSSAT 4.0. Agronomy Journal 102:1606-1621. Doi:10.2134/agronj2010.0277.
Simulating Alternative Dryland Rotational Cropping Systems in the Central Great Plains with RZWQM2 -
Saseendran, S.A., D.C. Nielsen, Liwang Ma, L.R. Ahuja, M.F. Vigil, 2010. Simulating Alternative Dryland Rotational Cropping Systems in the Central Great Plains with RZWQM2. Agronomy Journal. 102:1521-1534. doi:10.2134/agronj2010.0141.
Simulation of free air CO2 enriched wheat growth and interaction with water, nitrogen, and temperature -
Ko, J., Ahuja, L.R., Kimball, B.A., Anapalli, S., Ma, L., Green, T.R., Ruane, A., Wall, G.W., Pinter Jr, P.J., Bader, D. 2010. Simulation of free air CO2 enriched wheat growth and interaction with water, nitrogen, and temperature. Agricultural and Forest Meteorology. 150:1331-1346.
Effective soil hydraulic properties in space and time: some field data analysis and modeling concepts -
Green, T.R., Ahuja, L.R., Ma, L., Ascough II, J.C., Dunn, G.H. Effective Soil Hydraulic Properties in Space and Time: Some Field Data Analysis and Modeling Concepts. Agronomy Society of America, Crop Science Society of America, Soil Science Society of America Meeting. Paper No. 61385.
Optimizing Soil Hydraulic Parameters in RZWQM2 Under Fallow Conditions -
Fang, Q.X., Green, T.R., Ma, L., Malone, R.W., Erskine, R.H., Ahuja, L.R. 2010. Optimizing Soil Hydraulic Parameters in RZWQM2 Under Fallow Conditions. Soil Science Society of America Journal. 74(6):1897-1913. DOI:10.2136/sssaj2009.0380.
Soil-test N recommendations augmented with PEST optimized RZWQM simulations -
Malone, R.W., Jaynes, D.B., Ma, L., Nolan, B., Meek, D.W., Karlen, D.L. 2010. Soil-test N recommendations augmented with PEST optimized RZWQM simulations. Journal of Environmental Quality. 39:1711-1723.
Crop Water Use Efficiency at Multiple Scales -
Green, T.R., Yu, Q., Ma, L., Wang, T. 2010. Crop Water Use Efficiency at Multiple Scales. Agricultural Water Management. 97(8):1099-1101. Available: http://dx.doi.org/10.1016/j.agwat.2010.03.018.
Estimating effective soil properties of heterogeneous areas for modeling infiltration and redistribution -
Ahuja, L.R., Ma, L., Green, T.R. 2010. Estimating effective soil properties of heterogeneous areas for modeling infiltration and redistribution. Soil Science Society of America Journal. 74(5):1469-1482.
Water Resources and Agricultural Water Use in the North China Plain: Current Status and Management Options -
Fang, Q., Ma, L., Green, T.R., Yu, Q., Wang, T.D., Ahuja, L.R. 2010. Water Resources and Agricultural Water Use in the North China Plain: Current Status and Management Options. Agricultural Water Management. 97(8):1102-1116. Available: doi:10.1016/j.agwat.2010.01.008.
Predicting Unsaturated Zone Nitrogen Mass Balances in Agricultural Settings of the United States -
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 -
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.
RZWQM2 Simulations of Alternative Cropping Systems With and Without Summer Crops in the Central Great Plains -
Anapalli, S.S., Nielsen, D.C., Ma, L., Ahuja, L.R. 2009. RZWQM2 Simulations of Alternative Cropping Systems With and Without Summer Crops in the Central Great Plains. Agronomy Abstracts. Presented at the ASA/CSSA/SSSA annual meeting. Nov. 1-5, 2009. Pittsburg, PA.
A step by step procedure for parameterization, calibration, validation, and application of a system model in field research -
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.
Use of a Cropping System Model for Soil-Specific Optimization of Limited Water -
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.
Space-Time Dynamics of Soil Water and Process Interactions in Semi-Arid Terrain, Colorado, USA Reprint Icon -
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.
Simulation of Climate Change Impacts on Wheat-Fallow Cropping Systems -
Ko, J., Ahuja, L.R., Kimball, B.A., Anapalli, S., Ma, L., Green, T.R., Wall, G.W., Pinter Jr, P.J. 2009. Simulation of Climate Change Impacts on Wheat-Fallow Cropping Systems. ASA-CSSA-SSSA Annual Meeting Abstracts.
Modeling Responses of Dryland Spring Triticale, Proso Millet and Foxtail Millet to Initial Soil Water in the High Plains -
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.
Irrigation Strategies To Improve Water Use Efficiency in the Wheat-Maize Double Cropping System in China -
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 -
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.
Effects of Estimating Soil Hydraulic Properties and Root Growth Factor on Soil Water Balance and Crop Production -
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(3) :572-583.
Soil Nitrogen Balance Under Wastewater Management: Field Measurements and Simulation Results -
Sophocleous, M., Townsend, M.A., Vocasek, F., Ma, L., Ashok, K.C. 2009. Soil Nitrogen Balance Under Wastewater Management: Field Measurements and Simulation Results. Journal of Environmental Quality. 38:1286-1301.
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 -
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. 97:1146-1155. doi:10.1016/j.agwat.2008.09.015.
Winter Cover Crop Effects on Nitrate Leaching in Subsurface Drainage as Simulated by RZWQM-DSSAT -
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 -
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.
Current Water Deficit Stress Simulations in Selected Agricultural System Simulation Models -
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 Reprint Icon -
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.
Spatial Features, Scaling and Simulation in Semi-Arid Agricultural Terrain Reprint Icon -
Green, T.R., Erskine, R.H., Ma, L. 2008. Spatial Features, Scaling and Simulation in Semi-Arid Agricultural Terrain. American Society of Agronomy Meetings. Paper No. 257-9.
Simulated Effects of Nitrogen Management and Soil Microbes on Soil Nitrogen Balance and Crop Production -
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 -
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.
Modeling Crop Responses to Initial Soil Water in the High Plains -
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.
Use of Crop Simulation Models to Evaluate Limited Irrigation Management Options for Corn in Semi-Arid Environment Reprint Icon -
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.
N uptake effects on N loss in tile drainage as estimated by RZWQM -
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.
Ecological Models: Agricultural Models -
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 Reprint Icon -
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 Reprint Icon -
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).
Scaling Parameters of the Lewis-Kostiakov Water Infiltration Equation Across Soil Textural Classes and Extension to Rain Infiltration -
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 Reprint Icon -
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.
EMPIRICAL ANALYSIS AND PREDICTION OF NITRATE LOADING AND CROP YIELD FOR A CORN-SOYBEAN ROTATIONS -
Malone, R.W., Ma, L., Karlen, D.L., Meade, T.G., Meek, D.W., Heilman, P., Kanwar, R.S., Hatfield, J.L. 2007. Empirical analysis and prediction of nitrate loading and crop yield for a corn-soybean rotations. Geoderma. 140:223-234.
Evaluating and predicting agricultural management effects under tile-drainage using modified APSIM -
Malone, R.W., Huth, N., Carberry, P.S., Ma, L., Kaspar, T.C., Karlen, D.L., Meade, T.G., Kanwar, R.S., Heilman, P. 2007. Evaluating and predicting agricultural management effects under tile-drainage using modified APSIM. Geoderma. 140:310-322.
Simulated N Management Effects on Corn Yield and Tile-Drainage Nitrate Loss -
Malone, R.W., Ma, L., Heilman, P., Karlen, D.L., Kanwar, R.S., Hatfield, J.L. 2007. Simulated N Management Effects on Corn Yield and Tile-Drainage Nitrate Loss. Geoderma. 140:272-283.
Using the RZWQM to Simulate the Fate of Nitrogen in Field Soil - Crop Environment in the Mediterranean Region -
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 Reprint Icon -
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. Journal of Crop Improvement. 19 (1-2).
Modeling Pesticide Fate and Nonideal Transport From A Slow Release, Pesticide Treated Seed -
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.
Comparision of modeling approaches to quantify residue architecture effects on soil temperature and water -
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.
RZWQM Simulation Of Long-Term Crop Production, Water And Nitrogen Balances In Northeast Iowa -
Ma, L., Malone, R.W., Heilman, P., Karlen, D.L., Kanwar, R., Cambardella, C.A., Ahuja, L.R. 2007. RZWQM simulation of long-term crop production, water and nitrogen balances in northeast Iowa. Geoderma 140(3):247-259. doi: 10.1016/j.geoderma.2007.04.009.
SIMULATING MANAGEMENT EFFECTS ON CROP PRODUCTION, TILE DRAINAGE, AND WATER QUALITY USING RZWQM-DSSAT -
Anapalli, S., Ma, L., Malone, R.W., Heilman, P., Ahuja, L.R., Kanwar, R., Karlen, D.L., Hoogenboom, G. 2007. Simulating management effects on crop production, tile drainage, and water quality using RZWQM-DSSAT. Geoderma 140:3 (2007)297-309. Published on-line 5/23/2007. doi:10.1016/j.geoderma.2007.04.013.
Evaluation of Crop Water Stress Based On Soil Moisture, Evapotranspiration, and Canopy Temperature -
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.
Simulations of Limited-Water Irrigation Management Options for Corn in Dryland Agriculture -
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.
APPLICATIONS OF AGRICULTURAL SYSTEM MODELS IN ASSESSING AND MANAGING CONTAMINATION OF THE SOIL-WATER-ATMOSPHERE CONTINUUM IN AGRICULTURE -
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 -
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)
MODELING EFFECTS OF TILL/NO-TILL AND SURFACE CROP RESIDUES ON SOIL WATER, TEMPERATURE AND ENERGY BALANCE -
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 -
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. -
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.
DECISION SUPPORT FOR NITROGEN MANAGEMENT IN TILE-DRAINED AGRICULTURE 1825 -
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 -
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 -
Evaluating Various Water Stress Calculations in RZWQM and RZ-SHAW for Corn and Soybean Production -
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.
DECISION SUPPORT FOR NITROGEN MANAGEMENT IN TILE DRAINED AGRICULTURE 1811 -
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.
AN IMPROVED AGRICULTURAL SYSTEM MODEL FOR SPACE-TIME SIMULATION OF AGRICULTURAL LANDSCAPE VARIABILITY -
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 -
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 Reprint Icon -
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 -
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.
Crop Canopy and Residue Rainfall Interception Effects on Water and Crop Growth -
Modelling Crop Canopy and Residue Rainfall Interception Effects on Soil Hydrological Components for Semi-Arid Agriculture -
Kozak, J.A., Ahuja, L.R., Green, T.R., Ma, L. 2007. Modelling Crop Canopy and Residue Rainfall Interception Effects on Soil Hydrological Components for Semi-Arid Agriculture. Hydrological Processes. 21:229-241. Can be accessed at doi: 10.1002/hyp.6235.
MODELING A WHEAT-MAIZE DOUBLE CROPPING SYSTEM IN CHINA USING TWO PLANT GROWTH MODULES WITH RZWQM -
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.
EVALUATING NITROGEN AND WATER MANAGEMENT OF A DOUBLE CROPPING SYSTEM IN CHINA -
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.
TRANS-DISCIPLIANRY SOIL PHYSICS RESEARCH CRITICAL TO SYNTHESIS AND MODELING OF AGRICULTURAL SYSTEMS -
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.
FIELD SCALE WATER QUALITY MANAGEMENT IN THE US: STATE OF THE ART 2005 1814 -
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.
ENERGY BALANCE AND WATER AND HEAT TRANSFER SIMULATED BY SHAW AND RZ-SHAW -
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 -
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.
MODELING IMPACTS OF CROP ROTATIONS, TILLAGE AND N MANAGEMENT ON CROP PRODUCTIVITY AND WATER QUALITY USING THE RZWQM-DSSAT HYBRID MODEL -
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.
A NEW SOIL C/N MODULE TO SIMULATE DENITRIFICATION FOR GROUNDWATER REMEDIATION -
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.
DEVELOPMENT AND EVALUATION OF THE RZWQM-CROPGRO HYBRID MODEL FOR SOYBEAN PRODUCTION -
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.
EFFECTIVENESS OF RZWQM FOR SIMULATING ALTERNATIVE GREAT PLAINS CROPPING SYSTEMS -
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 -
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 -
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 -
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.
ASSESSMENT OF GROUNDWATER USE BY WHEAT (TRITICUM ACESTIVUM L.) IN THE LUANCHENG XIAN REGION AND POTENTIAL IMPLICATIONS FOR WATER CONSERVATION IN THE NORTHWESTERN NORTH CHINA PLAIN -
Chunsheng, H., Delgado, J.A., Xiying, Z., Ma, L. 2005. Assessment of groundwater use by wheat (triticum acestivum l.) in the luancheng xian region and potential implications for water conservation in the northwestern north china plain. Journal of Soil and Water Conservation. 60:80-88.
SCALING AND ESTIMATION OF EVAPORATION AND TRANSPIRATION OF WATER ACROSS SOIL TEXTURES -
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.
MODELING SPATIAL VARIABILITY IN AGRICULTURE: THE AGSIMSGIS WATER QUALITY TOOL -
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.
PRACTICAL APPLICATION OF SENSITIVITY AND UNCERTAINTY ANALYSIS TECHNIQUES: LESSONS LEARNED WITH TWO AGRICULTURAL SYSTEM MODELS -
Ascough Ii, J.C., Ma, L. 2004. Practical application of sensitivity and uncertainty analysis techniques: lessons learned with two agricultural system models. Meeting Abstract. www.asa-cssa-ssa.org/anmeet. Seattle, WA. Oct.31-11/4/2004.
PRACTICAL APPLICATION OF SENSITIVITY AND UNCERTAINTY ANALYSIS TECHNIQUES: LESSONS LEARNED WITH TWO AGRICULTURAL SYSTEM MODELS -
Ascough Ii, J.C., Ma, L. 2004. Practical application of sensitivity and uncertainty analysis techniques: lessons learned with two agricultural system models. ASA-CSSA-SSSA Annual Meeting Abstracts. Oct. 31 - Nov. 4 2004.
SIMULATING PLANTING DATE EFFECTS ON CORN PRODUCTION USING RZWQM AND CERES-MAIZE -
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).
PREDICTING PESTICIDE TRANSPORT IN MULCH AMENDED SOILS: A TWO-COMPARTMENT MODEL -
Ma, L., Selim, H.M. 2005. Predicting pesticide transport in mulch amended soils: a two-compartment model. Soil Science Society of America Journal. 69:318-327. 2005.
MODEL PARAMETERS FOR AGRICULTURAL SYSTEMS WITH NONLINEAR PROCESS INTERATIONS AND SPATIAL VARIABILITY -
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.
A GRAPHICAL TOOL FOR WATER QUALITY CONSERVATION PLANNING 1718 -
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.
ROLE OF MACROPORES IN PESTICIDE TRANSPORT TO GROUNDWATER -
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 -
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.
USING RZWQM TO SIMULATE WATER, NITROGEN, AND PLANTING DATE EFFECTS ON CORN, SOYBEAN, AND WINTER WHEAT PRODUCTION IN NORTHEAST COLORADO -
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.
MODELING ALTERNATIVE CROPPING SYSTEMS FOR CENTRAL GREAT PLAINS USING RZWQM -
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.
AGRICULTURAL SYSTEM MODELS IN FIELD RESEARCH AND TECHNOLOGY TRANSFER -
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.
MODEL PARAMETERIZATION AT DIFFERENT SCALES: HOW DO WE ESTIMATE AND INCORPORATE SPATIAL INFORMATION? -
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 -
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 -
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.
BOOK REVIEW: MATHEMATICAL MODELING FOR SYSTEM ANALYSIS IN AGRICULTURAL RESEARCH BY KAREL D. VOHNOUT -
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 -
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.
SIMULATING LATE SPRING NITROGEN TEST EFFECTS ON N LEACHING AND CROP PRODUCTION -
MALONE, R.W., MEADE, T.G., MA, L., ANAPALLI, S.A., KANWAR, R.S., KARLEN, D.L., HATFIELD, J.L., AHUJA, L.R. SIMULATING LATE SPRING NITROGEN TEST EFFECTS ON N LEACHING AND CROP PRODUCTION. CD-ROM. MADISON, WI. AMERICAN SOCIETY OF AGRONOMY MEETINGS. 2003.
SIMULATING SWINE MANURE EFFECTS ON N LEACHING AND CROP PRODUCTION -
MA, L., MALONE, R.W., ANAPALLI, S.A., MEADE, T.G., KANWAR, R.S., KARLEN, D.L., HATFIELD, J.L., AHUJA, L.R. SIMULATING SWINE MANURE EFFECTS ON N LEACHING AND CROP PRODUCTION. CD-ROM. MADISON, WI. AMERICAN SOCIETY OF AGRONOMY MEETINGS. 2003.
TEST OF THE ROOT ZONE WATER QUALITY MODEL (RZWQM) FOR PREDICTING RUNOFF OF ATRAZINE, ALACHLOR AND FENAMIPHOS SPECIES FROM CONVENTIONAL-TILLAGE CORN MESOPLOTS -
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).
APPLICATION OF THE ROOT ZONE WATER QUALITY MODEL (RZWQM) TO PESTICIDE FATE AND TRANSPORT: AN OVERVIEW -
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.
HERBICIDE LEACHING AS AFFECTED BY MACROPORE FLOW AND WITHIN-STORM RAINFALL INTENSITY VARIATION: A RZWQM SIMULATION -
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.
MODELING HYDROLOGY, METRIBUZIN DEGRADATION, AND METRIBUZIN TRANSPORT IN MACROPOROUS TILLED AND NO-TILL SILT LOAM SOIL USING RZWQM -
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.
SIMULATING NITRATE DRAINAGE LOSSES FROM A WALNUT CREEK WATERSHED FIELD -
Bakhsh, A., Hatfield, J.L., Kanwar, R.S., Ma, L., Ahuja, L.R. 2004. Simulating nitrate losses from walnut creek watershed. Journal of Environmental Quality. 33(1)114-123.
BOOK REVIEW: CROP-SOIL SIMULATION MODELS: APPLICATIONS IN DEVELOPING COUNTRIES -
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.
MODELING NITROGEN MANAGEMENT EFFECTS ON WINTER WHEAT PRODUCTION USING RZWQM AND CERES-WHEAT -
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.
TILLAGE EFFECT ON MACROPOROSITY AND HERBICIDE TRANSPORT IN PERCOLATE -
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 -
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.
PREDICTING THE EFFECTS OF AGRICULTURAL MANAGEMENT PRACTICES ON SUBSURFACE DRAINAGE: NITRATE -
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 -
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.
USE OF LIMITED SOIL PROPERTY DATA AND MODELING TO ESTIMATE ROOT ZONE SOIL WATER CONTENT. -
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.
SIMULATING SOYBEAN WATER STRESS EFFECTS WITH RZWQM AND CROPGRO MODELS -
NIELSEN, D.C., MA, L., AHUJA, L.R., HOOGENBOOM, G. SIMULATING SOYBEAN WATER STRESS EFFECTS WITH RZWQM AND CROPGRO MODELS. AGRONOMY JOURNAL. 2002. v. 94. p. 1234-1243.
EVALUATION OF ROOT ZONE WATER QUALITY MODEL FOR SIMULATION OF NON-POINT SOURCE POLUTION FROM AGRICULTURAL LANDS -
HOW GOOD IS GOOD ENOUGH? WHAT INFORMATION IS NEEDED FOR AGRICULTURAL WATER QUALITY PLANNING AND HOW CAN IT BE PROVIDED MOST AFFORDABLY? 1348 -
Adaptive grid refinement in numerical models for water flow and solute transport in soils: A review -
Mansell, R.S., Ma, L., Ahuja, L.R., Bloom, S.A. 2002. Adaptive grid refinement in numerical models for water flow and solute transport in soils: A review. Vadose Zone Journal. 1:222-238.
TOPOGRAPHIC ANALYSIS, SCALING AND MODELS TO EVALUATE SPATIAL/TEMPORAL VARIABILITY OF LANDSCAPE PROCESSES AND MANAGEMENT -
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.
WHOLE SYSTEM INTEGRATION AND MODELING: ESSENTIAL TO AGRICULTURAL SCIENCE AND TECHNOLOGY IN 21ST CENTURY -
Ahuja, L.R., Ma, L., Howell, T.A. 2002. Whole system integration and modeling: essential to agricultural science and technology in 21st century. CRC Book: Agricultural Sys Models in Field Research and Technology Transfer. Lewis Publishers. April 2002. Chapter One, pp 1-7.
AN EVALUATION OF RZWQM, CROPGRO, AND CERES-MAIZE FOR RESPONSE TO WATER STRESS IN THE CENTRAL GREAT PLAINS -
SIMULATING NITRATE LOSSES FROM WALNUT CREEK WATERSHED -
PARAMETERIZATION OF AGRICULTURAL SYSTEM MODELS: CURRENT APPROACHES AND FUTURE NEEDS -
WATER TRANSPORT MODELING USING RZWQM -
EVALUATION OF ROOT ZONE WATER QUALITY MODEL FOR SIMULATION OF NONPOINT SOURCE POLLUTION FROM AGRICULTURAL LANDS -
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.
EVALUATION OF THE ROOT ZONE WATER QUALITY MODEL (RZWQM) -
COMPUTER MODELS TO GUIDE SOIL WATER MANAGEMENT FOR PLANTS -
AGRICULTURAL SYSTEM MODELS IN FIELD RESEARCH AND TECHNOLOGY TRANSFER -
Ahuja, L.R., Ma, L., Howell, T.A. 2002. Agricultural system models in field research and technology transfer. CRC Book: Agricultural Sys Models in Field Research and Technology Transfer. 341 pp. 2002.
MACROPORE COMPONENT ASSESSMENT OF THE ROOT ZONE WATER QUALITY MODEL (RZWQM)USING NO-TILL SOIL BLOCKS -
SIMULATION OF WATER AND PESTICIDE MOVEMENT THROUGH MACROPORES USING THE ROOT ZONE WATER QUALITY MODEL (RZWQM) -
QUANTIFYING WHEEL-TRACK EFFECTS ON SOIL HYDRAULIC PROPERTIES FOR AGRICULTURAL SYSTEMS MODELING -
ASSESSMENT OF THE MACROPORE COMPONENT OF RZWQM -
ROOT ZONE WATER QUALITY MODEL SENSITIVITY ANALYSIS USING MONTE CARLO SIMULATION -
VALIDATION OF THE ROOT ZONE WATER QUALITY MODEL (RZWQM): A REVIEW -
ARS News Articles
Last Modified: 5/2/2016
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