Access Statistics for Philip Walter Gassman

Author contact details at EconPapers.

Working Paper File Downloads Abstract Views
Last month 3 months 12 months Total Last month 3 months 12 months Total
A Recent Trend in Ecological Economic Research: Quantifying the Benefits and Costs of Improving Ecosystem Services 0 0 0 0 0 1 2 89
A Recent Trend in Ecological Economic Research: Quantifying the Benefits and Costs of Improving Ecosystem Services 0 0 0 1 1 3 4 7
A Tale of Three Watersheds: Non-Point Source Pollution and Conservation Practices Across Iowa 0 0 0 0 2 2 6 40
A refined regional modeling approach for the Corn Belt – Experiences and recommendations for large-scale integrated modeling 0 0 0 0 0 0 0 2
Agricultural Policies and Soil Degradation in Western Canada: An Agro-Ecological Economic Assessment (Report 2: The Environmental Modelling System) 0 0 0 15 1 2 3 62
Agricultural Policies and Soil Degradation in Western Canada: An Agro-Ecological Economic Assessment (Report 3: The Integration of the Environmental and Economic Components) 0 0 1 1 0 1 5 35
Agricultural Policies and Soil Degradation in Western Canada: An Agro-Ecological Economic Assessment (Report 4: Modifications to CRAM and Policy Evaluation Results) 0 0 0 1 2 4 5 27
Agricultural Policies and Soil Degradation in Western Canada: An Agro-Ecological Economic Assessment (Report 5: Project Summary) 0 0 0 4 0 0 3 41
Agricultural Policies and Soil Degradation in Western Canada: An Agro-Ecological Economic Assessment, Report 1: Conceptual Framework 0 0 0 42 1 1 1 265
Agricultural Policies and Soil Degradation in Western Canada: An Agro-Ecological Economic Assessment, Report 2: The Environmental Modeling System 0 0 0 19 1 1 4 234
Agricultural Policies and Soil Degradation in Western Canada: An Agro-Ecological Economic Assessment. Report 3. The Integration of the Environmental and Economic Components 0 0 0 10 1 1 3 105
Agricultural Policies and Soil Degradation in Western Canada: An Agro-Ecological Economic Assessment. Report 4: Modifications to CRAM and Policy Evaluation Results 0 0 0 13 0 0 1 102
Agricultural Policies and Soil Degradation in Western Canada: An Agro-Ecological Economic Assessment. Report 5: Project Summary 0 0 0 27 2 3 4 186
Agricultural Policy Environmental EXtender (APEX) Model: An Emerging Tool for Landscape and Watershed Environmental Analyses, The 0 0 2 169 4 5 11 962
Agriculture Policies and Soil Degradation in Westwern Canada: An Agro- Ecological Economic Assessment. (report 1: Conceptual Framework) 0 0 0 0 2 2 3 545
Agriculture Policies and Soil Degradation in Westwern Canada: An Agro- Ecological Economic Assessment. (report 2: the Environmental Modelling System) 0 0 0 0 1 1 1 859
Allocating Nutrient Load Reduction across a Watershed: Implications of Different Principles 0 0 0 5 0 1 2 73
Application of Epic Within an Integrated Modeling System to Evaluate Soil Erosion in the Canadian Prairies 0 0 0 0 1 1 1 17
Atrazine and Water Quality: An Evaluation of Restricting Atrazine Use on Corn and Sorghum to Postemergent Applications, CEEPES Atrazine Project Research Memo 6 0 0 0 32 0 0 1 197
Atrazine and Water Quality: An Updated CEEPES Analysis, CEEPES Atrazine Project Research Memo 5 0 0 0 18 0 0 0 104
Calibration and Validation of SWAT for the Upper Maquoketa River Watershed 0 0 0 64 0 1 2 342
Carbon Sequestration, Co-Benefits, and Conservation Programs 0 1 2 33 1 2 3 210
Carbon Sequestration, Co-Benefits, and Conservation Programs 0 0 0 0 0 0 2 14
Carbon Sequestration, Co-Benefits, and Conservation Programs 0 0 0 12 2 2 3 154
Carbon Sequestration, Co-Benefits, and Conservation Programs 0 0 0 0 0 0 1 49
Climate Change Sensitivity Assessment on Upper Mississippi River Basin Streamflows Using SWAT 0 0 2 93 0 1 4 707
Climate Change and Downstream Water Quality in Agricultural Production: The Case of Nutrient Runoff to the Gulf of Mexico 0 0 0 9 1 1 6 25
Comparison of Land Use Area Estimates from Three Different Data Sources for the Upper Mississippi River Basin 0 0 0 0 0 0 0 6
Comparison of Land Use Area Estimates from Three Different Data Sources for the Upper Mississippi River Basin 0 0 0 18 2 2 2 156
Conservation Reserve Program in the Presence of a Working Land Alternative: Implications for Environmental Quality, Program Participation, and Income Transfer, The 0 0 0 48 4 4 6 254
Conservation Reserve Program in the Presence of a Working Land Alternative: Implications for Environmental Quality, Program Participation, and Income Transfer, The 0 0 0 21 0 1 1 176
Corn and Sorghum Herbicides and Water Quality: An Evaluation of Alternative Policy Options, CEEPES Project Research Memo 7 0 0 0 11 0 0 1 118
Cost-effective targeting of conservation investments to reduce the northern Gulf of Mexico hypoxic zone 0 0 0 0 1 1 1 5
Designation of Co-benefits and Its Implication for Policy: Water Quality versus Carbon Sequestration in Agricultural Soils, The 0 0 0 14 1 2 2 151
Economic and Environmental Co-benefits of Carbon Sequestration in Agricultural Soils: Retiring Agricultural Land in the Upper Mississippi River Basin 0 0 0 56 2 2 4 455
Economics of Dead Zones: Linking Externalities from the Land to their Consequences in the Sea, The 0 0 0 24 0 1 3 111
Effect of Watershed Subdivision on SWAT Flow, Sediment, and Nutrient Predictions 1 1 1 88 1 3 6 341
Environmental Component of the National Pilot Project Integrated Modeling System. Livestock Series Report 8, The 0 0 0 3 0 0 0 53
Environmental Conservation in Agriculture: Land Retirement Versus Changing Practices on Working Land 0 0 0 36 1 1 2 332
Environmental Conservation in Agriculture: Land Retirement versus Changing Practices on Working Land 0 0 0 95 0 2 3 509
Environmental conservation in agriculture: Land retirement vs. changing practices on working land 0 0 0 0 1 1 1 3
Epic Model Parameters for Cereal, Oilseed, and Forage Crops in the Northern Great Plains Region 0 0 0 0 0 1 4 113
Estimating Atrazine Leaching in the Midwest 0 0 0 0 0 1 1 56
Estimating Atrazine Leaching in the Midwest 0 0 0 10 0 0 0 78
Evaluating the Efficiency-Participation Tradeoff in Agricultural Conservation Programs: The Effect of Reverse Auctions, Spatial Targeting, and Higher Offered Payments 0 0 0 3 0 1 5 14
Evaluation of EPIC for Three Minnesota Cropping Systems 0 0 0 16 0 0 0 99
General, Process-Oriented Model for Two Competing Plant Species (A) 0 0 0 0 0 0 1 294
Historical Development and Applications of the EPIC and APEX Models 0 0 4 203 1 1 8 867
Impact of U.S. Agricultural Policy on Regional Nitrogen Losses [Poster Papers] 0 0 0 0 0 0 1 38
Impacts of climate change on hydrology, water quality and crop productivity in the Ohio-Tennessee River Basin 0 0 0 0 0 0 1 2
Interactive APEX (i_APEX) User's guide using APEX2110 and APEX0806 0 0 0 8 1 1 2 49
LUMINATE: linking agricultural land use, local water quality and Gulf of Mexico hypoxia 0 0 1 2 1 2 3 29
Land Use Change in a Biofuels Hotspot: The Case of Iowa, Usa 0 0 0 0 1 2 3 74
Land Use Model Integrating Agriculture and the Environment (LUMINATE): Linkages between Agricultural Land Use, Local Water Quality and Hypoxic Concerns in the Gulf of Mexico Basin 0 0 0 74 2 2 4 197
Late-1990s Climate Shift Impact on Corn Yield in Iowa 0 0 0 0 1 1 1 2
Least Cost Control of Agricultural Nutrient Contributions to the Gulf of Mexico Hypoxic Zone 0 0 0 0 0 0 3 90
Least-cost control of agricultural nutrient contributions to the Gulf of Mexico hypoxic zone 0 0 0 0 1 1 1 1
Livestock Pollution: Lessons from the European Union [Socioeconomic Considerations Section] 0 0 0 0 0 0 0 13
Metamodeling Approach to Evaluate Agricultural Policy Impact on Soil Degradation in Western Canada (A) 0 0 0 11 0 0 0 173
Metamodels and Nonpoint Pollution Policy in Agriculture 0 0 0 31 0 0 0 176
Metamodels and Nonpoint Pollution Policy in Agriculture 0 0 0 33 1 1 1 267
Metamodels and nonpoint pollution policy in agriculture 0 0 0 0 0 0 1 10
Moving from Theory to Implementation 0 0 0 0 0 0 1 10
National Pilot Program Integrated Modeling System: Environmental Baseline Assumptions and Results for the APEX Model. Livestock Series Report 9, The 0 0 0 44 1 1 1 178
Nonpoint Source Needs Assessment for Iowa Part II: the Cost of Improving Iowa’s Water Quality 0 1 1 1 0 2 4 6
Nonpoint Source Needs Assessment for Iowa Part III: Economic and Environmental Outcomes 0 0 0 0 0 1 1 5
Optimal Placement of Conservation Practices Using Genetic Algorithm with SWAT 0 0 0 15 0 0 1 77
Pesticide Fate Research Trends Within a Strict Regulatory Environment: The Case of Germany 0 0 0 0 1 1 1 77
Pesticide Fate Research Trends within a Strict Regulatory Environment: The Case of Germany 0 0 0 8 0 1 2 75
Placing bounds on extreme temperature response of maize 0 1 1 2 0 1 1 4
Potential Adoption of Managed Aquifer Recharge Systems in the Corn Belt Region 0 0 0 0 0 0 1 9
Privatizing Ecosystem Services: Water Quality Effects from a Carbon Market 0 0 0 0 1 1 1 67
Privatizing Ecosystem Services: Water Quality Effects from a Carbon Market 0 0 0 0 0 1 1 5
RAPS 1996: Agricultural and Environmental Outlook 0 0 0 0 0 0 0 37
RAPS 1997: Agricultural and Environmental Outlook 0 0 0 0 0 1 1 45
REGIONAL ESTIMATION OF SOIL CARBON AND OTHER ENVIRONMENTAL INDICATORS USING EPIC AND I_EPIC 0 0 0 0 0 0 0 4
Regional Estimation of Soil Carbon and Other Environmental Indicators Using EPIC and i_EPIC 0 0 0 41 0 0 1 210
Relation Between Local Climatology and Odor Transport 0 0 0 0 0 0 0 8
Sny Magill Watershed Modeling Project: Final Report 0 0 0 9 1 1 2 118
Soil and Water Assessment Tool: Historical Development, Applications, and Future Research Directions, The 0 0 0 217 3 5 11 966
The Agricultural Policy Environmental EXtender (APEX) Model: An Emerging Tool for Landscape and Watershed Environmental Analyses 1 1 1 7 2 2 2 77
The Allocation of Nutrient Load Reduction Across a Watershed: Assessing Delivery Coefficients As an Implementation Tool 0 0 0 54 2 2 3 249
The Conservation Reserve Program in the Presence of a Working Land Alternative: Implications for Environmental Quality, Program Participation, and Income Transfer 0 0 0 0 0 1 2 5
The Cost of Cleaner Water: Assessing Agricultural Pollution Reduction at the Watershed Scale 0 0 0 0 1 3 6 185
The Economics of Dead Zones: Causes, Impacts, Policy Challenges, and a Model of the Gulf of Mexico Hypoxic Zone 0 0 2 6 0 0 3 23
The Optimality of Using Marginal Land for Bioenergy Crops: Tradeoffs between Food, Fuel, and Environmental Services 0 0 0 1 0 0 1 4
The Soil and Water Assessment Tool: Historical Development, Applications, and Future Research Directions 0 0 0 2 0 1 6 19
The Urgent Need to Address Nutrient Imbalance Problems in Iowa's High-Density Livestock Regions 0 0 0 9 0 0 0 13
The Water Quality Effects of Corn Ethanol vs Switchgrass Based Biofuels in the Midwest 0 0 0 60 1 1 2 302
The Water Quality Effects of Corn Expansion in the Midwest 0 0 0 0 2 3 5 74
Transfers and Environmental Co-Benefits of Carbon Sequestration in Agricultural Soils: Retiring Agricultural Land in the Upper Mississippi River Basin 0 0 0 56 2 3 3 266
Transfers and environmental co-benefits of carbon sequestration in agricultural soils: retiring agricultural land in the Upper Mississippi River Basin 0 0 0 1 1 2 4 15
Upper Mississippi River Basin Modeling System Part 3: Conservation Practice Scenario Results 0 0 0 0 0 0 1 184
Use of a Linked Biophysical and Economic Modeling System to Evaluate Risk-Benefit Tradeoffs of Corn Herbicide Use in the Midwest 0 0 0 0 0 0 0 35
Using a coupled simulation-optimization approach to design cost-effective reverse auctions for watershed nutrient reductions 0 0 0 15 0 1 2 65
Validation of EPIC for Two Watersheds in Southwest Iowa 0 0 0 25 1 1 3 117
Validation of Epic for Two Watersheds in Southwest Iowa 0 0 0 0 0 0 1 64
Water Quality Modeling for the Raccoon River Watershed Using SWAT 0 0 0 119 2 3 5 492
Total Working Papers 2 5 18 2,065 66 109 232 14,855
1 registered items for which data could not be found


Journal Article File Downloads Abstract Views
Last month 3 months 12 months Total Last month 3 months 12 months Total
A Metamodeling Approach to Evaluate Agricultural Policy Impact on Soil Degradation in Western Canada 0 0 1 3 1 1 2 14
A Tale of Three Watersheds: Nonpoint Source Pollution and Conservation Practices across Iowa 0 0 0 8 0 1 1 34
An Improved Reverse Auction for Addressing Water Quality in Agricultural Watersheds Using Coupled Simulation-Optimization Models 0 0 0 24 1 1 2 123
Carbon Sequestration, Co-Benefits, and Conservation Programs 0 0 1 5 6 6 9 74
Climate Change Impacts on Surface Runoff and Nutrient and Sediment Losses in Buchanan County, Iowa 0 0 1 1 0 0 1 9
Environmental conservation in agriculture: Land retirement vs. changing practices on working land 0 1 1 37 1 3 7 173
Evaluating the tradeoff between cost effectiveness and participation in agricultural conservation programs 0 0 0 2 1 3 7 15
Evaluation of Long-Term SOC and Crop Productivity within Conservation Systems Using GFDL CM2.1 and EPIC 0 0 0 2 0 2 2 46
Evaluation of flood metrics across the Mississippi-Atchafalaya River Basin and their relation to flood damages 0 0 0 0 0 0 1 1
Evaluation of the performance of the EPIC model for yield and biomass simulation under conservation systems in Cambodia 0 1 1 16 2 4 5 94
Field scale SWAT+ modeling of corn and soybean yields for the contiguous United States: National Agroecosystem Model Development 0 0 0 1 2 2 10 17
Integrated assessment of nitrogen runoff to the Gulf of Mexico 0 0 0 1 2 3 4 11
Integrated ecological-economic modelling of water pollution abatement management options in the Upper Ems River Basin 0 0 0 68 2 2 5 292
LUMINATE: linking agricultural land use, local water quality and Gulf of Mexico hypoxia 0 0 0 6 1 2 2 39
Privatizing Ecosystem Services: Water Quality Effects from a Carbon Market 0 0 0 9 1 2 4 45
Simulated Climate Change Impacts on Corn and Soybean Yields in Buchanan County, Iowa 0 0 0 1 1 5 9 19
Simulated Ecosystem and Farm-Level Economic Impacts of Conservation Tillage in a Northeastern Iowa County 0 0 0 0 2 3 3 9
The Conservation Reserve Program in the Presence of a Working Land Alternative: Implications for Environmental Quality, Program Participation, and Income Transfer 0 0 0 7 0 0 2 83
The Economics of Dead Zones: Causes, Impacts, Policy Challenges, and a Model of the Gulf of Mexico Hypoxic Zone 0 0 0 24 1 3 6 151
The Optimality of Using Marginal Land for Bioenergy Crops: Tradeoffs between Food, Fuel, and Environmental Services 0 0 0 4 0 0 2 19
The urgency of transforming the Midwestern U.S. landscape into more than corn and soybean 0 0 0 0 1 1 1 27
Total Journal Articles 0 2 5 219 25 44 85 1,295


Chapter File Downloads Abstract Views
Last month 3 months 12 months Total Last month 3 months 12 months Total
Climate Change and Downstream Water Quality in Agricultural Production: The Case of Nutrient Runoff to the Gulf of Mexico 0 0 0 5 0 0 0 24
Corn Stover Harvesting: Potential Supply and Water Quality Implications 0 0 0 0 1 1 1 7
Total Chapters 0 0 0 5 1 1 1 31


Statistics updated 2025-12-06