Projects

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

SPATIAL MODELING OF AGRICULTURAL WATERSHEDS: WATER AND NUTRIENT MANAGEMENT AND TARGETED CONSERVATION EFFECTS AT FIELD TO WATERSHED SCALES Appropriated (D)   Accession Number: 422726

DELIVERY OF THE OMS-BASED AGES-W RESOURCE CONCERNS ASSESSMENT MODEL FOR EVALUATING WATER/NUTRIENT MANAGEMENT AND CONSERVATION EFFECTS Specific Cooperative Agreement (S)   Accession Number: 422050

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

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

Introducing the GRACEnet/REAP data contribution, discovery and retrieval system - (Peer Reviewed Journal) - (17-May-13)

Modeling landscape-scale nitrogen management for conservation - (Book / Chapter) - (24-Mar-13)

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

Sensitivity and first-order/Monte Carlo uncertainty analysis of the WEPP hillslope erosion model - (Peer Reviewed Journal)

Ascough II, J.C., Flanagan, D.C., Nearing, M.A., Engel, B.A. 2013. Sensitivity and first-order/Monte Carlo uncertainty analysis of the WEPP hillslope erosion model. Transactions of the ASABE. 56(2)/437-452.

Simulating crop phenological responses to water stress using the phenology mms software component - (Peer Reviewed Journal)

Mcmaster, G.S., Ascough II, J.C., Edmunds, D.A., Nielsen, D.C., Prasad, P.V. 2013. Simulating crop phenological responses to water stress using the phenology mms software component. Applied Engineering in Agriculture. Vol. 29(2): 233-249.

Improving Evapotranspiration Simulations in the CERES-Maize Model under Limited Irrigation - (Peer Reviewed Journal)

DeJonge, K.C., Ascough Ii, J.C., Andales, A.A., Hansen, N.C., Garcia, L.A., Ababi, M. 2012. Improving Evapotranspiration Simulations in the CERES-Maize Model under Limited Irrigation. Agricultural Water Management (2012), pp. 92-103.

ArgoEcoSystem-watershed (AgES-W) model evaluation for streamflow and nitrogen/sediment dynamics on a midwest agricultural watershed - (Proceedings)

Ascough II, J.C., David, O., Smith, D.R., Kipka, H., Fink, M., Green, T.R., Krause, P., Mcmaster, G.S., Kralisch, S., Ahuja, L.R. 2012. ArgoEcoSystem-watershed (AgES-W) model evaluation for streamflow and nitrogen/sediment dynamics on a midwest agricultural watershed. In: Seppelt, R., Voinov, A.A., Lange, S., and Bankamp, D. editors,Proceedings of the Sixth Biennial Meetinf or the International Environmental Modeling and Software Society, Managing Resources of a Limited Planet: Pathways and Visions Under Uncertainty, July 1-5, 2012, Leipzig, Germany. p. 2179-2186.

The AgESGUI geospatial simulation system for environmental model application and evaluation - (Proceedings)

Ascough II, J.C., David, O., Murthy, S.V. 2012. The AgESGUI geospatial simulation system for environmental model application and evaluation. In Seppelt, R., Voinov, A.A., Lange, S., and Bankamp, D., editors. Proceedings of the Sixth Biennial Meeting of the International Environmental Modeling and Software Society, Managing Resources of a Limited Planet: Pathways and Visions uner Uncertainty, July 1-5, 2012, Leipzig, Germany. p. 1519-1526.

Domain specific languages for modeling and simulation: use case OMS3 - (Proceedings)

David, O., Lloyd, W., Ascough II, J.C., Green, T.R., Olson, K., Leavesley, G.H., Carlson, J.R. 2012. Domain specific languages for modeling and simulation: use case OMS3. In: Seppelt, R., Voinov, A.A., Lange, S., and Bankamp, D., editors. Proceedings of the Sixth Biennial Meeting of the International Environmental Modelling and Software Society, Managing Resources of a Limited Planet: Pathways and Visions under Uncertainty, July 1-5, 2012, Leipzig, Germany. p. 1201-1207.

The cloud services innovation platform- enabling service-based environmental modelling using infrastructure-as-a-service cloud computing - (Proceedings)

Lloyd, W., David, O., Lyon, J., Rojas, K.W., Ascough II, J.C., Green, T.R., Carlson, J.R. 2012. The cloud services innovation platform- enabling service-based environmental modelling using infrastructure-as-a-service cloud computing. In: Seppelt, R., Voinov, A.A., Lange, S., and Bankamp, D., editors, Proceedings of the Sixth Biennial Meeting of the International Environmental Modelling and Software Society, Managing Resources of a Limited Planet: Pathways and Visions under Uncertaintly, July 1-5, 2012, Leipzig, Germany. p.1208-1215.

WEPP: Model use, calibration and validation - (Peer Reviewed Journal)

Flanagan, D.C., Frankenberger, J.R., Ascough II, J.C. 2012. WEPP: Model use, calibration and validation. Transactions of the American Society of Agricultural and Biological Engineers. 55(4):1463-1477.

Opportunities for increasing utility of models for rangeland management - (Peer Reviewed Journal)

Derner, J.D., Augustine, D.J., Ascough Ii, J.C., Ahuja, L.R. 2012. Opportunities for increasing utility of models for rangeland management. Rangeland Ecology and Management. 65(6):623-631.

A software engineering perspective on environmental modeling framework design: The object modeling system - (Peer Reviewed Journal)

David, O., Ascough II, J.C., Lloyd, W., Green, T.R., Rojas, K.W., Leavesley, G.H., Ahuja, L.R. 2012. A software engineering perspective on environmental modeling framework design: The object modeling system. Journal of Environmental Modeling and Software. 39 (2013):201-213.

Spatial interrelationships between wheat phenology, thermal time, and terrain attributes - (Peer Reviewed Journal)

Mcmaster, G.S., Green, T.R., Erskine, R.H., Edmunds, D.A., Ascough II, J.C. 2012. Spatial interrelationships between wheat phenology, thermal time, and terrain attributes. Agronomy Journal. 104(4):1110-1121.

Global sensitivity analysis of a dynamic agroecosystem model under different irrigation treatments - (Peer Reviewed Journal)

DeJonge, K.C., Ascough II, J.C., Ahmadi, M., Andales, A.A., Arabi, M. 2012. Global sensitivity analysis of a dynamic agroecosystem model under different irrigation treatments. Ecological Modeling. 231(2012):113-125.

Development and application of a modular watershed-scale hydrologic model using the object modeling system: runoff response evaluation - (Peer Reviewed Journal)

Ascough II, J.C., David, O., Krause, P., Heathman, G.C., Kralisch, S., Larose, M., Ahuja, L.R., Kipka, H. 2012. Development and application of a modular watershed-scale hydrologic model using the object modeling system: runoff response evaluation. Transactions of the ASABE. 55(1):117-135.

Environmental decision support systems (EDSS)development- challenges and best practices - (Peer Reviewed Journal)

Mcintosh, B.S., Ascough II, J.C., Twery, M., Chew, J., Elmahdi, A., Haase, D., Harou, J., Hepting, D., Cuddy, S., Jakeman, A.J., Chen, S., Kassahun, A., Lautenbach, S., Matthews, K., Merritt, W., Quinn, N.W., Rodriguez-Roda, I., Sieber, S., Stavenga, M., Sulis, A., Ticehurst, J., Volk, M., Wrobel, M., Vandelden, H., El-Sawah, S., Rizzoli, A., Voinov, A. 2011. Environmental decision support systems (EDSS)development- challenges and best practices. Journal of Environmental Modeling and Software. 26(12):1389-1402.

International symposium on erosion and landscape evolution abstracts - (Book / Chapter)

Ascough II, J.C., Flanagan, D.C. (Editors) 2011. International Symposium on Erosion and Landscape Evolution Abstracts. ASABE Pub. No. 711P0311. St. Joseph, Mich.: American Society of Agricultural and Biological Engineers. 135 p.

Development of a combined Wind and Water Erosion Model (WWEM) for the Object Modeling System - (Proceedings)

Ascough II, J.C., Flanagan, D.C., Truman, C.C., David, O. 2011. Development of a combined Wind and Water Erosion Model (WWEM) for the Object Modeling System. In: Ascough II, J.Cl and Flanagan, D.C. (eds.),Proceedings of the International Symposium on Erosion and Landscape Evolution (ISELE) /September 18-21, 2011, Anchorage, AK. American Society of Agricultural and Biological Engineers (ASABE) Publication No. 711P0311, St. Joseph, MI. p. 60.

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

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

Rainfall Intensity Effects on Runoff and Sediment Losses From a Colorado Alfisol - (Proceedings)

Truman, C.C., Ascough II, J.C., Davis, J. 2011. Rainfall Intensity Effects on Runoff and Sediment Losses From a Colorado Alfisol. In: Ascough II, J.C. and Flanagan, D.C. (eds.), Proceedings of the International Symposium on Erosion and Landscape Evolution (ISELE), September 18-21, 2011, Anchorage, Alaska. American Society of Agricultural and Biological Engineers Publication No. 711P0311, St. Joseph, MI, p. 44. (Refereed Symposium Proceedings.) http://elibrary.asabe.org/azdez.asp?earch=1&JID=1&AID=39244&CID=isel2011&v=&i=&%-2&url.

The AgES-NLEAP tool for precision nitrogen conservation management - (Abstract Only)

Ascough II, J.C., Delgado, J.A. 2011. The AgES-NLEAP tool for precision nitrogen conservation management. Soil and Water Conservation Annual Meeting, July 17-20, 2011, Washington, D.C. p.13.

Evaluation of the Agro-EcoSystem-Watershed (AgES-W)model for estimating nutrient dynamics on a midwest agricultural watershed - (Abstract Only)

Ascough II, J.C., David, O., Smith, D.R., Heathman, G.C. 2011. Evaluation of the Agro-EcoSystem-Watershed (AgES-W)model for estimating nutrient dynamics on a midwest agricultural watershed. Soil and Water Conservation Society Annual Meeting,July 17-20,2011, Washington, D.C. Paper No. CTT-2.

Phenology MMS: a program to simulate crop phenological responses to water stress - (Peer Reviewed Journal)

Mcmaster, G.S., Edmunds, D.A., Wilhelm, W.W., Nielsen, D.C., Prassad, P.V., Ascough II, J.C. 2011. Phenology MMS: a program to simulate crop phenological responses to water stress. Computers and Electronics in Agriculture. 77(2011):118-125.

Environmental modeling framework invasiveness: analysis and implications - (Peer Reviewed Journal)

Lloyd, W., David, O., Ascough II, J.C., Rojas, K.W., Carlson, J., Leavesley, G.H., Krause, P., Green, T.R., Ahuja, L.R. 2011. Environmental modeling framework invasiveness: analysis and implications. Environmental Modeling & Software. 26(10):1240-1250.

Common challenges for ecological modelling: Synthesis of facilitated discussions held at the symposia organized for the 2009 conference of the International Society for Ecological Modelling in Quebec City, Canada - (Peer Reviewed Journal)

Larocque, G.R., Mailly, D., Yue, T.X., Anand, M., Peng, C., Kazanci, C., Etterson, M., Goethals, P., Jorgensen, S.E., Schramski, J.R., Mcintire, E.J., Marceau, D.J., Chen, B., Chen, G.Q., Yang, Z.F., Novotna, B., Luckai, N.G., Bhatti, J.S., Liu, J., Munson, A., Gordon, A.M., Ascough II, J.C. 2011. Common challenges for ecological modelling: Synthesis of facilitated discussions held at the symposia organized for the 2009 conference of the International Society for Ecological Modelling in Quebec City, Canada. Ecological Modelling. 222(14):2456-2468.

Modeling water and soil quality environmental impacts associated with bioenergy crop production and biomass removal in the midwest usa - (Peer Reviewed Journal)

Powers, S.E., Ascough II, J.C., Nelson, R.G., Larocque, G.R. 2011. Modeling water and soil quality environmental impacts associated with bioenergy crop production and biomass removal in the midwest usa. Ecological Modeling. 222(14):2430-2447.

Modeling of full and limited irrigation scenarios for corn in a semiarid environment - (Peer Reviewed Journal)

DeJonge, K.C., Andales, A.A., Ascough II, J.C., Hansen, N.C. 2011. Modeling of full and limited irrigation scenarios for corn in a semiarid environment. Transactions of the ASABE. 54(2):481-492.

Spatially-distributed stream flow and nutrient dynamics simulations using the component-based AgroEcoSystem-Watershed (AgES-W)Model - (Abstract Only)

Ascough II, J.C., David, O., Heathman, G.C., Smith, D.R., Green, T.R., Krause, P., Kipka, H., Fink, M. 2010. Spatially-distributed stream flow and nutrient dynamics simulations using the component-based AgroEcoSystem-Watershed (AgES-W)Model. American Geophysical Union. Fall Meeting, December 13-17, 2010, San Francisco, California. Paper No. H43F-1329.

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

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

Simulated rainfall study for transport of veterinary antibiotics - mass balance analysis - (Peer Reviewed Journal)

Sung-Chul, K., Davis, J.G., Truman, C.C., Ascough II, J.C., Carlson, K. 2009. Simulated rainfall study for transport of veterinary antibiotics - mass balance analysis. Journal of Hazardous Materials. 175:836-843.

Crop Management to Cope with Global Change: A Systems Perspective Aided by Information Technologies - (Book / Chapter)

McMaster, G.S., Ascough II, J.C. 2011. Crop Management to Cope with Global Change: A Systems Perspective Aided by Information Technologies. Centre for Agriculture and Biosciences International. p. 172-190.

Simulating landscape catena effects in no-till dryland agroecosystems using GPFARM - (Peer Reviewed Journal)

Ascough II, J.C., Andales, A.A., Sherrod, L.A., Mcmaster, G.S., Hansen, N.C., DeJonge, K.C., Fathelrahman, E.M., Ahuja, L.R., Peterson, G.A., Hoag, D.L. 2010. Simulating landscape catena effects in no-till dryland agroecosystems using GPFARM. Agricultural Systems. 103(8): 569-584.

Effective soil hydraulic properties in space and time: some field data analysis and modeling concepts - (Abstract Only)

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.

A conservation ontology and knowledge base to support delivery of technical assistance to agricultural producers in the united states - (Proceedings)

Carlson, J.R., Butler, D.B., David, O., Rojas, K.W., Ascough II, J.C., Leavesley, G.H., Oaks, W.R., Price, L.C., Ahuja, L.R. 2010. A conservation ontology and knowledge base to support delivery of technical assistance to agricultural producers in the united states. In: Swayne, D.A., Yang, W., Voinov, A.A., Rizzoli, A., and Filatova, T., editors. Environmental Modeling International Conference Proceedings. International Modeling and Environmental Software Society, Modeling for Environment's Sake, July 5-8, 2010, Ottawa, Canada. p. 1861-1869.

Integrated agricultural system modeling using OMS3: component driven runoff and nutrient dynamics simulations - (Proceedings)

Ascough II, J.C., David, O., Krause, P., Fink, M., Kralisch, S., Kipka, H., Wetzel, M. 2010. Integrated agricultural system modeling using OMS3: component driven runoff and nutrient dynamics simulations. In: Swayne, D.A., Yang, W., Voinov, A.A., Rizzoli, A., and Filatova, T., editors. Environmental Modeling International Conference Proceedings. International Modeling and Environmental Software Society, Modelling for Environment's Sake, July 5-8, 2010, Ottawa, Canada. p. 1089-1097.

Rethinking modeling framework design: object modeling system 3.0 - (Proceedings)

David, O., Ascough II, J.C., Leavesley, G.H., Ahuja, L.R. 2010. Rethinking modeling framework design: object modeling system 3.0. In: Swayne, D.A., Yang, W.,Voinov, A.A., Rizzoli, A., and Filatova, T., editors. Environmental Modeling International Conference Proceedings. International Modeling and Environmental Software Society, Modeling for Environment's Sake, July 5-8, 2010, Ottawa, Canada. p. 1183-1191.

The GPFARM DS for agroecosystem sustainability: the past, future, and lessons learned - (Proceedings)

Ascough II, J.C., Mcmaster, G.S., Dunn, G.H., Andales, A.A. 2010. The GPFARM DS for agroecosystem sustainability: the past, future, and lessons learned. In: Swayne, D.A., Yang, W., Voinov, A.A., Rizzoli, A., and Filatova, T., editors. Environmental Modeling International Conference Proceedings. International Modeling and Environmental Software Society, Modelling for Environment's Sake, July 5-8, 2010, Ottawa, Canada. p.2540-2547.

Environmental modeling framework invasiveness: analysis and implications - (Proceedings)

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. 2010. Environmental modeling framework invasiveness: analysis and implications. In: Swayne, D.A., Yang, W.,Voinov, A.A., Rizzoli, A., and Fillatova, T. editors. Environmental Modeling International Conference Proceedings. International Modeling and Software Society, Modelling for Environment's Sake, July 5-8, 2010, Ottawa, Canada, p. 1073-1080.

An analytical framework to assist decision makers in the use of forest ecosystem model predictions - (Peer Reviewed Journal)

Larocque, G.R., Bhatti, J.S., Ascough II, J.C., Liu, J., Luckai, N., Mailly, D., Archambault, L., Gordon, A.M. 2011. An analytical framework to assist decision makers in the use of forest ecosystem model predictions. Journal of Environmental Modeling and Software. 26(3):280-288.

Object-Oriented Agricultural System Modeling: Component-Driven Nutrient Dynamics and Crop Yield Simulations - (Abstract Only)

Ascough II, J.C., David, O., Krause, P., Ahuja, L.R. 2009. Object-Oriented Agricultural System Modeling: Component-Driven Nutrient Dynamics and Crop Yield Simulations. ASA-CSSA-SSSA Annual Meeting Abstracts.

Calibration and Evaluation of CERES-Maize in Full and Limited Irrigation Scenarios for Corn in a Semiarid Environment - (Abstract Only)

DeJonge, K.C., Andales, A.A., Ascough II, J.C., Hansen, N.C. 2009. Calibration and Evaluation of CERES-Maize in Full and Limited Irrigation Scenarios for Corn in a Semiarid Environment. ASA-CSSA-SSSA Annual Meeting Abstracts.

Economic Risk Analysis of Agricultural Tillage Systems Using the SMART Stochastic Efficiency Software Package - (Proceedings)

Ascough II, J.C., Fathelrahman, E.M., Vandenberg, B.C., Green, T.R., Hoag, D.L. 2009. Economic Risk Analysis of Agricultural Tillage Systems Using the SMART Stochastic Efficiency Software Package. World IMACS Congress and MODSIM09 International Congress on Modelling and Simulation. p. 463-469.

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

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.

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

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. p.17-18.

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

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. p.19-20.

Farming Systems Modeling Using the Object Modeling System (OMS): Overview, Applications, and Future Plans - (Abstract Only)

Carlson, J.R., Ascough II, J.C., David, O., Green, T.R., Rojas, K.W., Ahuja, L.R., Geter, F.W. 2010. Farming Systems Modeling Using the Object Modeling System (OMS): Overview, Applications, and Future Plans. Meeting Abstract. p. 49-50.

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

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.

Evaluating GPFARM Crop Growth, Soil Water, and Soil Nitrogen Components for Colorado Dryland Locations - (Research Technical Update)

Ascough II, J.C. 2009. Evaluating GPFARM Crop Growth, Soil Water, and Soil Nitrogen Components for Colorado Dryland Locations. Natural Resources Research Update (NRRU). Update #238985.

Combined Wind and Water Erosion Modeling - (Abstract Only)

Flanagan, D.C., Wagner, L.E., Ascough Ii, J.C., Frankenberger, J.R. 2009. Combined Wind and Water Erosion Modeling [abstract]. Soil and Water Conservation Society and CEAP meeting, July 11-15, 2009, Dearborn, Michigan. 2009. CDROM.

Step 7: Choose the "Best" Risk Management Alternative - (Book / Chapter)

Hoag, D.L., Fathelrahman, E.M., Ascough II, J.C. 2009. Step 7: Choose the "Best" Risk Management Alternative. Book Chapter.

Modeling with Limited Data: The Influence of Crop Rotation and Management on Weed Communities and Crop Yield Loss - (Peer Reviewed Journal)

Stephen R. Canner, L. J. Wiles, Robert H. Erskine, Gregory S. McMaster, Gale H. Dunn, and James C. Ascough, II*: Modeling with Limited Data: The Influence of Crop Rotation and Management on Weed Communities and Crop Yield Loss: Weed Science 2009 57:175–186

The Importance of Uncertainty and Sensitivity Analyses in Process-Based Models of Carbon and Nitrogen Cycling in Terrestrial Ecosystems with Particular Emphasis on Forest Ecosystems - (Peer Reviewed Journal)

Larocque, G.R., Bhatti, J.S., Liu, J., Ascough II, J.C., Luckai, N., Gordon, A.M. 2008. The Importance of Uncertainty and Sensitivity Analyses in Process-Based Models of Carbon and Nitrogen Cycling in Terrestrial Ecosystems with Particular Emphasis on Forest Ecosystems. Ecological Modeling. 219(3-4):261-263.

Conservation Tillage to Effectively Reduce Interrill Erodibility of Highly-Weathered Ultisols - (Peer Reviewed Journal)

Truman, C.C., Shaw, J.N., Flanagan, D.C., Reeves, D.W., Ascough II, J.C. 2009. Conservation Tillage to Effectively Reduce Interrill Erodibility of Highly-Weathered Ultisols. Journal of Soil and Water Conservation. 64(4):265-275. doi:10.2489/jswc.64.4.265.

SWAT Evaluation of Soil and Land Use GIS Data Sets on Simulated Stream Flow - (Peer Reviewed Journal)

Heathman, G.C., Larose, M., Ascough II, J.C. 2009. SWAT Evaluation of Soil and Land Use GIS Data Sets on Simulated Stream Flow. Journal of Soil and Water Conservation. 64(1):17-32.

Model development for evaluating USDA Conservation practices - (Proceedings)

Ascough, II, J.C., Romkens, M.J. 2008. Model development for evaluating USDA Conservation practices. Proceedings of the ASCE World Environmental and Water Resources Congress Conference. May 12-18,2008. Honolulu, HI. CD-ROM.

Development of a common water and wind erosion model for soil conservation planning - (Proceedings)

Flanagan, D.C., Ascough II, J.C., Wagner, L.E. 2008. Development of a common water and wind erosion model for soil conservation planning. In: Proceedings of the AgroEnviron 2008 (Sixth International Symposium AgroEnviron), April 28-May 1, 2008, Antalya, Turkey. p. 12.

Using Stochastic Effciency Analysis To Factor Distribution Of Weed Escapes Into Weed Management Decisions - (Abstract Only)

Wiles, L., Fathelrahman, E.M., Wilkerson, G.G., Ascough II, J.C. 2008. Using Stochastic Effciency Analysis To Factor Distribution Of Weed Escapes Into Weed Management Decisions. International Weed Science Congress.

Tillage Effects on Soil Hydraulic Properties in Space and Time: State of the Science - (Review Article)

Strudley, M.W., Green, T.R., Ascough Ii, J.C. 2008. Tillage Effects on Soil Hydraulic Properties in Space and Time: State of the Science. International Journal of Soil and Tillage Research. 99:4-48. 2008.

Development of a Common Water and Wind Erosion Model for Soil Conservation Planning - (Abstract Only)

Flanagan, D.C., Ascough II, J.C., Wagner, L.E. 2008. Development of a Common Water and Wind Erosion Model for Soil Conservation Planning. In: Proceedings of the Agro-Environment Symposium, April 28-May 1, 2008, Antalya, Turkey. 2008 CDROM.

Tradeoff Analysis Between Economic Development and Climate Change Adaptation Strategies for River Nile Basin Water Resources - (Book / Chapter)

Fathelrahman, E.M., Ascough II, J.C., Green, T.R., Babiker, M.H., Strzepek, K.M. 2009. Tradeoff Analysis Between Economic Development and Climate Change Adaptation Strategies for River Nile Basin Water Resources. In: Taylor, R.,Tindimugaya, C., Owor, M., and Shamsudduha, M, editors. Groundwater and Climate in Africa (Proceedings of the Kampala Conference, June 2008). Wallingford, UK: IAHS Bood Publication 334. p. 257-269.

Insect Pests Models and Insecticide Application - (Book / Chapter)

Ascough II, J.C., Fathelrahman, E.M., Mcmaster, G.S. 2008. Insect Pest Models and Insecticide Application. In: Jorgensen, S.E., Faith, B.D. editors. Ecological Models. Vol. (3) Encyclopedia of Ecology., 5 vols. Oxford, Elsevier. p. 1978-1985.

Using the Response Surface Method (RSM) for Economic and Environmental Tradeoffs Between Economics and Environment at the Farm Level - (Proceedings)

Ascough Ii, J.C., Fathelrahman, E.M., Hoag, D.L. 2007. Using the Response Surface Method (RSM) for Economic and Environmental Tradeoffs Between Economics and Environment at the Farm Level. Farming Systems Design 2007 Conference, Catania, Sicily, Italy. September 10-12, 2007. Symposium Proceedings p.164-165.

Stakeholder Payoff Matrix for Disparate Tradeoffs - (Proceedings)

Hoag, D., Ascough II, J.C., Fathelrahman, E.M., Keske, C.M. 2007. Stakeholder Payoff Matrix for Disparate Tradeoffs. Farming Systems Design 2007 Conference, Catania, Sicily, Italy, September 10-12,2007. Symposium Proceedings, Session 1.6, p150-151.

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.

Combining ARS Process-Based Water and Wind Erosion Prediction Technologies - (Abstract Only)

Flanagan, D.C., Frankenberger, J.R., Fox, F.A., Wagner, L.E., Ascough Ii, J.C. 2007. Combining ARS Process-Based Water and Wind Erosion Prediction Technologies. Soil Science Society of America Annual Meeting Abstracts, November 4-8, 2007, New Orleans, Louisiana. 2007 CDROM.

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

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.

Evaluating EPIC-based Harvest Index Approach for Yield Prediction and Response to Soil Water - (Abstract Only)

Mcmaster, G.S., Ascough Ii, J.C., Andales, A.A., Edmunds, D.A. 2007. Evaluating EPIC-based Harvest Index Approach for Yield Prediction and Response to Soil Water. ASA-CSSA-SSSA Annual Meeting, New Orleans, November 5,2007 (61-7).

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

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).

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.

Future Research Challenges for Incorporating Uncertainty in Environmental and Ecological Decision-Making - (Peer Reviewed Journal)

Ascough II, J.C., Maier, H.R., Ravalco, J.K., Strudley, M.W. 2008. Future Research Challenges for Incorporating Uncertainty in Environmental and Ecological Decision-Making. Ecological Modeling. 219(3-4):383-399.

Uncertainty in Environmental Decision-Making: Issues, Challenges and Future Directions - (Book / Chapter)

Maier, H.R., Ascough Ii, J.C., Wattenbach, M., Renschler, C.S., Labiosa, W.B., Ravalico, J.K. 2008. Uncertainty in Environmental Decision-Making: Issues, Challenges and Future Directions. Environmental Modeling & Software.

Integrated Modelling Frameworks for Environmental Assessment and Decision Support - (Book / Chapter)

Rizzoli, A.E., Leavesley, G.H., Ascough Ii, J.C., Argent, R.M., Athanasiadis, I.N., Brilhante, V.C., Claeys, F.H., David, O., Donatelli, M., Gijsbers, P., Havlik, D., Kassahun, A., Krause, P., Quinn, N.W., Scholten, H., Sojda, R.S., Villa, F. 2008. Integrated Modelling Frameworks for Environmental Assessment and Decision Support. Environmental Modeling & Software.

Development of an integrated water and wind erosion model - (Abstract Only)

Flanagan, D.C., Ascough II, J.C., Wagner, L.E., Geter, W.F. 2006. Development of an integrated water and wind erosion model. American Geophysical Union. December 11-15, 2006, San Francisco, CA. 2006 CDROM.

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

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.

ANTIBIOTIC TRANSPORT VIA RUNOFF AND SOIL LOSS - (Peer Reviewed Journal)

Davis, J.G., Truman, C.C., Kim, S.C., Ascough II, J.C., Carlson, K. 2006. Antibiotic transport via runoff and soil loss. Journal of Environmental Quality. 35:2250-2260.

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.

PRACTICAL SENSITIVITY AND UNCERTAINTY ANALYSIS TECHNIQUES APPLIED TO AGRICULTURAL SYSTEMS MODELS - (Abstract Only)

Ascough Ii, J.C. 2006. Practical sensitivity and uncertainty analysis techniques applied to agricultural systems models. Meeting Abstract. IEMSS. Burlington, VT. July 9-13,2006.

UNCERTAINTY IN ENVIRONMENTAL DECISION-MAKING: ISSUES, CHALLENGES AND FUTURE DIRECTIONS - (Proceedings)

Maier, H.R., Ascough Ii, J.C. 2006. Uncertainty in environmental decision-making: issues, challenges and future directions. Environmental Modeling & Software.

SIMULATION MODELING OF LIMITED IRRIGATION CROPPING SYSTEMS IN THE SOUTH PLATTE RIVER BASIN - (Abstract Only)

Ascough Ii, J.C., Hansen, N.C. 2006. Simulation modeling of limited irrigation cropping systems in the south platte river basin. Soil and Water Conservation Society Annual Meeting. July 22-26, 2006. Keystone, Colorado.

MODELING SPATIAL-TEMPORAL SOIL WATER AND OVERLAND FLOW IN A DRYLAND WHEAT-FALLOW FIELD USING MARIA-GIS - (Abstract Only)

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

AN IMPROVED AGRICULTURAL SYSTEM MODEL FOR SPACE-TIME SIMULATION OF AGRICULTURAL LANDSCAPE VARIABILITY - (Abstract Only)

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.

KEY CRITERIA AND SELECTION OF SENSITIVITY ANALYSIS METHODS APPLIED TO NATURAL RESOURCE MODELS - (Proceedings)

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)

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)

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.

MULTI-CROP PLANT GROWTH MODELING FOR AGRICULTURAL MODELS AND DECISION SUPPORT SYSTEMS - (Proceedings)

Mcmaster, G.S., Ascough Ii, J.C., Edmunds, D.A., Andales, A.A., Wagner, L.E., Fox, F.A. 2005. Multi-crop plant growth modeling for agricultural models and decision support systems. International Congress on Modeling and Simulation Proceedings.

ENVIRONMENTAL AND ECONOMIC ANALYSIS OF SWITCHGRASS PRODUCTION FOR WATER QUALITY IMPROVEMENT AND ALTERNATIVE ENERGY USE IN NORTHEAST KANSAS - (Peer Reviewed Journal)

Nelson, R.G., Ascough Ii, J.C., Langemeier, M.C. 2006. Environmental and economic analysis of switchgrass production for water quality improvement and alternative energy use in northeast kansas. Journal of Environmental Management. (2006). 79: 4 (336-347).

DEVELOPMENT OF A HILLSLOPE EROSION MODULE FOR THE OBJECT MODELING SYSTEM - (Proceedings)

Flanagan, D.C., Ascough II, J.C., Geter, W.F., David, O. 2005. Development of a hillslope erosion module for the object modeling system. ASAE Annual International Meeting. Paper No. 05-2012. 1-11 pp.

SPATIAL WATER QUALITY MODELING FRAMEWORK DEVELOPMENT USING ARCGIS9 - (Proceedings)

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.

ASSESSING THE POTENTIAL OF THE OBJECT MODELING SYSTEM (OMS) FOR EROSION PREDICTION MODELING - (Proceedings)

Ascough II, J.C., Flanagan, D.C., David, O. 2005. Assessing the potential of the object modeling system (oms) for erosion prediction modeling. Proceedings 05-211. 2005 ASAE Annual International Meeting, Tampa, FL. July 17-20. http://asae/frymulti.com/techpapers.asp?confid=tfl2005.

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.

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.

DECISION MAKING WITH ENVIRONMENTAL INDICES - (Book / Chapter)

Hoag, D.L., Ascough Ii, J.C., Keske-Handley, C.G., Koontz, L.R. 2005. Decision making with environmental indices. Book Chapter. In: Burk, A.R. (Ed), New Trends in Ecology Research. Nova Science Publishers, Hauppauge, NY. Chapter 7, pg. 159-182. 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.

MODELING SPATIAL VARIABILITY IN AGRICULTURE: THE AGSIMSGIS WATER QUALITY TOOL - (Abstract Only)

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 - (Abstract Only)

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.

PRACTICAL APPLICATION OF SENSITIVITY AND UNCERTAINTY ANALYSIS TECHNIQUES: LESSONS LEARNED WITH TWO AGRICULTURAL SYSTEM MODELS - (Abstract Only)

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.

MODEL PARAMETERS FOR AGRICULTURAL SYSTEMS WITH NONLINEAR PROCESS INTERATIONS AND SPATIAL VARIABILITY - (Abstract Only)

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.

THE FUTURE OF SPATIAL MODELING AT GPSRU - (Abstract Only)

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.

MODEL PARAMETERIZATION AT DIFFERENT SCALES: HOW DO WE ESTIMATE AND INCORPORATE SPATIAL INFORMATION? - (Abstract Only)

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.

SPACE-TIME MODELING OF AGRICULTURAL LANDSCAPE VARIABILITY USING AGSIMGIS - (Proceedings)

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.

DEVELOPING NATURAL RESOURCE MODELS USING THE OBJECT MODELING SYSTEM: FEASIBILITY AND CHALLENGES - (Proceedings)

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.

TERRAIN-BASED SCALING AND SIMULATION OF CROPPING SYSTEMS - (Abstract Only)

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.

GPFARM PLANT MODEL PARAMETERS: COMPLICATIONS OF VARIETIES AND THE GENOTYPE X ENVIRONMENT INTERACTION IN WHEAT - (Peer Reviewed Journal)

MCMASTER, G.S., ASCOUGH II, J.C., SHAFFER, M.J., DEER ASCOUGH, L.A., BYRNE, P.F., NIELSEN, D.C., HALEY, S.D., ANDALES, A.A., DUNN, G.H. GPFARM PLANT MODEL PARAMETERS: COMPLICATIONS OF VARIETIES AND THE GENOTYPE X ENVIRONMENT INTERACTION IN WHEAT. TRANSACTIONS OF THE AMERICAN SOCIETY OF AGRICULTURAL ENGINEERS. 2003.

AGSIMGIS: INTEGRATED GIS AND AGRICULTURAL SYSTEM MODELING - (Abstract Only)

ASCOUGH II, J.C., GREEN, T.R., CIPRA, J.E., FLYNN, R.L., NORMAN, J.B. AGSIMGIS: INTEGRATED GIS AND AGRICULTURAL SYSTEM MODELING. ENVIRONMENTAL SYSTEMS RESEARCH INSTITUTE USERS CONFERENCE PROCEEDINGS. 2003.

GPFARM CYCLING OF CROP RESIDUES - (Abstract Only)

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.

MULTICRITERIA SPATIAL DECISION SUPPORT SYSTEMS FOR AGRICULTURE: OVERVIEW, APPLICATIONS, AND FUTURE RESEARCH DIRECTIONS - (Proceedings)

Ascough II, J.C., Rector, H.D., Hoag, D.L., Mcmaster, G.S., Vandenberg, B.C., Shaffer, M.J., Weltz, M.A., Ahuja, L.R. 2002. Multicriteria spatial decision support systems for agriculture: overview, applications, and future research directions. Environmental Modeling International Conference Proceedings. 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. 3, pp. 175-180.

PARAMETERIZING GPFARM: AN AGRICULTURAL DECISION SUPPORT SYSTEM FOR INTEGRATING SCIENCE, ECONOMICS, RESOURCE USE, AND ENVIRONMENTAL IMPACTS - (Proceedings)

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.

APPLICATION AND TESTING OF GPFARM: A FARM AND RANCH DECISION SUPPORT SYSTEMFOR EVALUATING ECONOMIC AND ENVIRONMENTAL SUSTAINABILITY OF AGRICULTURAL ENTERPRISES - (Peer Reviewed Journal)

Dunn, G.H., Weltz, M.A., Mcmaster, G.S., Ascough Ii, J.C., Shaffer, M.J., Palic, D.B., Vandenberg, B.C., Bartling, P.N., Edmunds, D.A., Hoag, D.L., Ahuja, L.R. 2002. Application and testing of gpfarm: a farm and ranch decision support systemfor evaluating economic and environmental sustainability of agricultural enterprises. Acta Horticulture (ISHS) 593:171-177. www.actahort.og/books/593/593_22.htm

THE IMPACT MATRIX APPROACH AND DECISION RULES TO ENHANCE INDEX DIMENSIONALITY, FLEXIBILITY AND REPRESENTATION - (Peer Reviewed Journal)

HOAG, D.L., ASCOUGH II, J.C., ENGLER-PALMA, A. THE IMPACT MATRIX APPROACH AND DECISION RULES TO ENHANCE INDEX DIMENSIONALITY, FLEXIBILITY AND REPRESENTATION. JOURNAL OF ECOLOGICAL INDICATORS. 2(2002):161-168.

COMPUTER USE AND SATISFACTION BY GREAT PLAINS PRODUCERS: ORDERED LOGIT MODEL ANALYSIS - (Peer Reviewed Journal)

ASCOUGH II, J.C., HOAG, D.L., MCMASTER, G.S., FRASIER, W.M. COMPUTER USE AND SATISFACTION BY GREAT PLAINS PRODUCERS: ORDERED LOGIT MODEL ANALYSIS. AGRONOMY JOURNAL. 94:1263-1269 (2002).

GPFARM: AN INTEGRATED DECISION SUPPORT SYSTEM FOR SUSTAINABLE GREAT PLAINS AGRICULTURE - (Proceedings)

ASCOUGH II, J.C., HOAG, D.L., SHAFFER, M.J., MCMASTER, G.S., AHUJA, L.R. GPFARM: AN INTEGRATED DECISION SUPPORT SYSTEM FOR SUSTAINABLE GREAT PLAINS AGRICULTURE. MEETING ABSTRACT. 2002.

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.

TARGETING SOIL CONSERVATION POLICIES FOR SUSTAINABILITY: NEW EMPIRICAL EVIDENCE - (Peer Reviewed Journal) - (17-Oct-01)

SUSTAINABLE SOIL MANAGEMENT: A FRAMEWORK FOR ANALYSIS - (Proceedings)

POPP, J.H., HOAG, D.L., ASCOUGH II, J.C. SUSTAINABLE SOIL MANAGEMENT: A FRAMEWORK FOR ANALYSIS. MEETING ABSTRACT. 2002.

GPFARM SIMULATION OF SOIL NUTRIENT CYCLING UNDER MAIZE - (Abstract Only)

Shaffer, M.J., Yu, M., Bartling, P.N., Ho, N., Mcmaster, G.S., Ascough Ii, J.C., Ahuja, L.R., Weltz, M.A. 2001. Gpfarm simulation of soil nutrient cycling under maize. Agronomy Abstracts. American Society of Agronomy Meetings, October 2001.

CD-ROM Proceedings International Symposium on Erosion and Landscape Evolution (ISELE) - (Book / Chapter)

Flanagan, D.C., Ascough II, J.C., Nieber, J.L. (Editors) 2011. CD-ROM Proceedings International Symposium on Erosion and Landscape Evolution (ISELE). In: Proceedings of the American Society of Agricultural and Biological Engineers International (ASABE). 711P0311cd.

GPFARM:AN INTEGRATED DECISION SUPPORT SYSTEM FOR SUSTAINABLE GREAT PLAINS AGRICULTURE - (Book / Chapter) - (07-May-01)

CHAPTER 7: THE WATER EROSION PREDICTION PROJECT (WEPP) MODEL - (Book / Chapter) - (07-Mar-01)

SOIL EROSION FOR THE 21ST CENTURY - (Book / Chapter) - (05-Mar-01)

USING THE GPFARM DSS FOR EVALUATING DRYLAND CROPPING SYSTEM PRODUCTION AND ECONOMICS IN THE WESTCENTRAL GREAT PLAINS - (Abstract Only)

2000 Annual Meetings Abstracts, American Society of Agronomy/Crop Science Society of America/Soil Science Society of America. Minneapolis, Minnesota, November 5-9, 2000. pp 22.

USING THE GPFARM DSS FOR EVALUATING DRYLAND CROPPING SYSTEM PRODUCTION AND ECONOMICS IN THE WESTCENTRAL GREAT PLAINS - (Abstract Only)

2000 Annual Meetings Abstracts, American Society of Agronomy/Crop Science Society of America/Soil Science Society of America. Minneapolis, Minnesota, November 5-9, 2000. pp 22.

USING THE GPFARM DSS FOR EVALUATING DRYLAND CROPPING SYSTEM PRODUCTION AND ECONOMICS IN THE WESTCENTRAL GREAT PLAINS - (Abstract Only)

2000 Annual Meetings Abstracts, American Society of Agronomy/Crop Science Society of America/Soil Science Society of America. Minneapolis, Minnesota, November 5-9, 2000. pp 22.

USING THE GPFARM DSS FOR EVALUATING DRYLAND CROPPING SYSTEM PRODUCTION AND ECONOMICS IN THE WESTCENTRAL GREAT PLAINS - (Abstract Only)

2000 Annual Meetings Abstracts, American Society of Agronomy/Crop Science Society of America/Soil Science Society of America. Minneapolis, Minnesota, November 5-9, 2000. pp 22.

WILL FARMERS USE COMPUTERS FOR RESOURCE AND ENVIRONMENTAL MANAGEMENT? - (Peer Reviewed Journal) - (12-Jun-00)

OBJECT-ORIENTED SIMULATION OF INTEGRATED WHOLE-FARM:GPFARM FRAMEWORK - (Peer Reviewed Journal) - (15-Feb-00)

ROOT ZONE WATER QUALITY MODEL SENSITIVITY ANALYSIS USING MONTE CARLO SIMULATION - (Peer Reviewed Journal) - (28-Oct-99)

USING THE ANALYTICAL HIERARCY PROCESS TO DETERMINE ECONOMIC AND ENVIRONMENT TRADEOFFS ON FARMS - (Abstract Only) - (01-Aug-99)

SCALE ISSUES IN MODELING AGROECOSYSTEMS: A REVIEW - (Abstract Only)

Ascough Ii, J.C., Green, T.R., Ruan, H., Ahuja, L.R. 1999. Scale issues in modeling agroecosystems: a review. Agronomy Abstracts. American Society of Agronomy Meetings. October 31, 1999.

EFFECTS OF OVERLAND AND LATERAL SUBSURFACE FLOW ON SOIL WATER VARIABILITY AT THE FIELD SCALE: MODEL DEVELOPMENT - (Abstract Only)

Ruan, H., Green, T.R., Ascough Ii, J.C., Ahuja, L.R. 1999. Effects of overland and lateral subsurface flow on soil water variability at the field scale: model development. Agronomy Abstracts, American Society of Agronomy Meetings, October 1999.

FARM COMPUTER ADOPTION IN THE GREAT PLAINS - (Peer Reviewed Journal) - (07-Apr-99)

COMPUTER USE IN AGRICULTURE: AN ANALYSIS OF GREAT PLAINS PRODUCERS - (Peer Reviewed Journal) - (27-Mar-99)

ESTIMATING THE ECONOMIC BENEFITS OF UNIFORMITY-IMPROVING CAPITAL INVESTMENTS IN IRRIGATED CROP ENTERPRISES: IMPLICATIONS FOR PRODUCER PROFITS AND RESOURCE CONSERVATION - (Proceedings) - (01-Mar-99)

A DYNAMIC ANALYSIS OF NITRATE LEACHING IN CORN PRODUCTION UNDER NON UNIFORMIRRIGATION CONDITIONS - (Peer Reviewed Journal) - (05-Sep-98)

THE SURFACE IMPOUNDMENT ELEMENT FOR WEPP - (Peer Reviewed Journal) - (15-Aug-98)

SPATIALLY VARIABLE HYDRODYNAMIC SIMULATION OF OVERLAND FLOW - (Proceedings) - (11-Jul-98)

APPLICATION OF GENERIC CROP GROWTH MODEL TECHNOLOGY TO GREAT PLAINS CONSERVATION SYSTEMS - (Proceedings)

Deer-Ascough, L.A., Mcmaster, G.S., Ascough Ii, J.C., Peterson, G.A. 1998. Application of generic crop growth model technology to great plains conservation systems. American Society of Agricultural Engineers Meetings Papers. Paper #98-2133.

APPLICATION OF GENERIC CROP GROWTH MODEL TECHNOLOGY TO GREAT PLAINS CONSERVATION SYSTEMS - (Proceedings)

Deer-Ascough, L.A., Mcmaster, G.S., Ascough Ii, J.C., Peterson, G.A. 1998. Application of generic crop growth model technology to great plains conservation systems. American Society of Agricultural Engineers Meetings Papers. Paper #98-2133.

APPLICATION OF GENERIC CROP GROWTH MODEL TECHNOLOGY TO GREAT PLAINS CONSERVATION SYSTEMS - (Proceedings)

Deer-Ascough, L.A., Mcmaster, G.S., Ascough Ii, J.C., Peterson, G.A. 1998. Application of generic crop growth model technology to great plains conservation systems. American Society of Agricultural Engineers Meetings Papers. Paper #98-2133.

APPLICATION OF GENERIC CROP GROWTH MODEL TECHNOLOGY TO GREAT PLAINS CONSERVATION SYSTEMS - (Proceedings)

Deer-Ascough, L.A., Mcmaster, G.S., Ascough Ii, J.C., Peterson, G.A. 1998. Application of generic crop growth model technology to great plains conservation systems. American Society of Agricultural Engineers Meetings Papers. Paper #98-2133.

HYDRAULIC SIMULATION TECHNIQUES INCORPORTED IN THE SURFACE IMPOUNDMENT OF WEPP - (Peer Reviewed Journal) - (07-May-98)

CPIDS: A PLANT PARAMETER SELECTION PROGRAM FOR EROSION PREDICTION MODELING - (Peer Reviewed Journal) - (20-Mar-98)

SUBJECTIVE EVALUATION OF DECISION SUPPORT SYSTEMS USING MULTIATTRIBUTE DECISION MAKING (MADM) - (Book / Chapter) - (01-Aug-97)

THE WEPP WATERSHED MODEL: 1. MODEL DESCRIPTION - (Peer Reviewed Journal) - (01-Jul-97)

THE WEPP WATERSHED MODEL: II. SENSITIVITY ANALYSIS TO WATERSHED DISCRETIZATION AND CHANNEL INPUT PARAMETERS - (Peer Reviewed Journal) - (03-Jun-97)

THE WEPP WATERSHED MODEL: III. COMPARISONS TO MEASURED DATA - (Peer Reviewed Journal) - (03-Jun-97)

VALIDATION OF THE HYDROLIC EVEALUATION OF LANDFILL PERFORMANCE (HELP) VERSION 3 MODEL FOR LANDFILL TEST CELLS IN MICHIGAN, UTAH, AND DELAWARE - (Proceedings) - (21-May-97)

THE SURFACE IMPOUNDMENT ELEMENT FOR WEPP: PART II: SEDIMENTATION - (Peer Reviewed Journal) - (01-Apr-97)

THE SURFACE IMPOUNDMENT ELEMENT FOR WEPP: PART I: HYDRAULIC SIMULATION - (Peer Reviewed Journal) - (01-Apr-97)

WEPP WATERSHED MODEL TECHNOLOGY - (Abstract Only) - (15-Sep-96)

THE WATER EROSION PREDICTION PROJECT (WEPP) MODELS FOR USE IN NATURAL RESOURCES MANAGEMENT - (Abstract Only) - (15-Sep-96)

WATERSHED MODEL CHANNEL HYDROLOGY AND EROSION PROCESSES, CHAPTER 13 - (Book / Chapter) - (15-Sep-95)

WEPP EROSION COMPONENT - (Abstract Only) - (15-Sep-95)

OVERVIEW OF THE WATER EROSION PREDICTION PROJECT EROSION MODEL, CHAPTER 1 - (Book / Chapter) - (10-Aug-95)

THE GPFARM DECISION SUPPORT SYSTEM FOR WHOLE FARM/RANCH MANAGEMENT - (Proceedings) - (01-Jan-95)