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 3 4 92
A Recent Trend in Ecological Economic Research: Quantifying the Benefits and Costs of Improving Ecosystem Services 0 0 0 1 2 3 9 13
A Tale of Three Watersheds: Non-Point Source Pollution and Conservation Practices Across Iowa 0 0 0 0 1 2 8 43
A refined regional modeling approach for the Corn Belt – Experiences and recommendations for large-scale integrated modeling 0 0 0 0 0 0 4 6
Agricultural Policies and Soil Degradation in Western Canada: An Agro-Ecological Economic Assessment (Report 2: The Environmental Modelling System) 0 0 0 15 1 3 11 71
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 1 2 2 12 44
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 6 7 14 37
Agricultural Policies and Soil Degradation in Western Canada: An Agro-Ecological Economic Assessment (Report 5: Project Summary) 0 0 0 4 3 5 9 48
Agricultural Policies and Soil Degradation in Western Canada: An Agro-Ecological Economic Assessment, Report 1: Conceptual Framework 0 0 0 42 1 2 7 271
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 7 239
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 3 4 7 111
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 5 6 8 110
Agricultural Policies and Soil Degradation in Western Canada: An Agro-Ecological Economic Assessment. Report 5: Project Summary 0 0 0 27 6 6 10 193
Agricultural Policy Environmental EXtender (APEX) Model: An Emerging Tool for Landscape and Watershed Environmental Analyses, The 0 1 2 170 4 11 28 981
Agriculture Policies and Soil Degradation in Westwern Canada: An Agro- Ecological Economic Assessment. (report 1: Conceptual Framework) 0 0 0 0 1 2 4 547
Agriculture Policies and Soil Degradation in Westwern Canada: An Agro- Ecological Economic Assessment. (report 2: the Environmental Modelling System) 0 0 0 0 0 0 2 860
Allocating Nutrient Load Reduction across a Watershed: Implications of Different Principles 0 0 0 5 1 3 7 79
An integrated Assessment Framework to Evaluate Conservation Practices’ Environmental and Economic Benefits: A case for three Central Iowa watersheds 0 0 0 0 1 2 5 5
Application of Epic Within an Integrated Modeling System to Evaluate Soil Erosion in the Canadian Prairies 0 0 0 0 2 2 3 19
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 0 197
Atrazine and Water Quality: An Updated CEEPES Analysis, CEEPES Atrazine Project Research Memo 5 0 0 0 18 0 1 4 108
CARBON SEQUESTRATION, CO-BENEFITS, AND CONSERVATION PROGRAMS 0 0 0 0 7 8 10 10
CLIMATE CHANGE SENSITIVITY ASSESSMENT ON UPPER MISSISSIPPI RIVER BASIN STREAMFLOWS USING SWAT 0 0 1 1 1 1 4 4
Calibration and Validation of SWAT for the Upper Maquoketa River Watershed 0 0 0 64 2 4 8 348
Calibration and Validation of SWAT for the Upper Maquoketa River Watershed 0 0 0 0 2 2 9 9
Carbon Sequestration, Co-Benefits, and Conservation Programs 0 0 0 0 1 1 10 58
Carbon Sequestration, Co-Benefits, and Conservation Programs 0 0 0 0 5 5 7 20
Carbon Sequestration, Co-Benefits, and Conservation Programs 0 0 0 12 2 2 7 158
Carbon Sequestration, Co-Benefits, and Conservation Programs 0 0 2 33 3 6 13 220
Climate Change Sensitivity Assessment on Upper Mississippi River Basin Streamflows Using SWAT 0 0 3 94 1 5 14 718
Climate Change and Downstream Water Quality in Agricultural Production: The Case of Nutrient Runoff to the Gulf of Mexico 0 0 0 9 3 3 6 30
Comparison of Land Use Area Estimates from Three Different Data Sources for the Upper Mississippi River Basin 0 0 0 18 0 0 5 159
Comparison of Land Use Area Estimates from Three Different Data Sources for the Upper Mississippi River Basin 0 0 0 0 1 2 5 11
Conservation Reserve Program in the Presence of a Working Land Alternative: Implications for Environmental Quality, Program Participation, and Income Transfer, The 0 0 1 49 1 3 10 259
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 3 4 10 185
Corn and Sorghum Herbicides and Water Quality: An Evaluation of Alternative Policy Options, CEEPES Project Research Memo 7 0 0 0 11 1 1 7 125
Cost-effective targeting of conservation investments to reduce the northern Gulf of Mexico hypoxic zone 0 0 0 0 2 4 8 12
Designation of Co-benefits and Its Implication for Policy: Water Quality versus Carbon Sequestration in Agricultural Soils, The 0 0 0 14 0 1 6 155
ENVIRONMENTAL CONSERVATION IN AGRICULTURE: LAND RETIREMENT VERSUS CHANGING PRACTICES ON WORKING LAND 0 0 0 0 4 4 9 9
Economic and Environmental Co-benefits of Carbon Sequestration in Agricultural Soils: Retiring Agricultural Land in the Upper Mississippi River Basin 0 0 0 56 0 3 10 462
Economic and Environmental Co-benefits of Carbon Sequestration in Agricultural Soils: Retiring Agricultural Land in the Upper Mississippi River Basin 0 0 0 0 2 3 5 5
Economics of Dead Zones: Linking Externalities from the Land to their Consequences in the Sea, The 0 0 0 24 0 0 5 114
Effect of Watershed Subdivision on SWAT Flow, Sediment, and Nutrient Predictions 0 0 1 88 1 3 9 347
Environmental Component of the National Pilot Project Integrated Modeling System. Livestock Series Report 8, The 0 0 0 3 0 0 2 55
Environmental Conservation in Agriculture: Land Retirement Versus Changing Practices on Working Land 0 0 0 36 3 3 7 338
Environmental Conservation in Agriculture: Land Retirement versus Changing Practices on Working Land 0 0 0 95 0 0 7 513
Environmental conservation in agriculture: Land retirement vs. changing practices on working land 0 0 0 0 3 4 9 11
Epic Model Parameters for Cereal, Oilseed, and Forage Crops in the Northern Great Plains Region 0 0 0 0 1 2 9 120
Estimating Atrazine Leaching in the Midwest 0 0 0 10 3 4 5 83
Estimating Atrazine Leaching in the Midwest 0 0 0 0 2 3 5 60
Estimating Atrazine Leaching in the Midwest 0 0 0 0 2 3 4 4
Evaluating the Efficiency-Participation Tradeoff in Agricultural Conservation Programs: The Effect of Reverse Auctions, Spatial Targeting, and Higher Offered Payments 0 0 0 3 3 6 10 22
Evaluation of EPIC for Three Minnesota Cropping Systems 0 0 0 0 2 2 2 2
Evaluation of EPIC for Three Minnesota Cropping Systems 0 0 0 16 1 3 4 103
General, Process-Oriented Model for Two Competing Plant Species (A) 0 0 0 0 2 4 7 301
Historical Development and Applications of the EPIC and APEX Models 2 2 3 3 4 5 21 21
Historical Development and Applications of the EPIC and APEX Models 0 1 6 205 2 6 19 879
IMPACT OF WATERSHED SUBDIVISION LEVEL ON FLOWS, SEDIMENT LOADS, AND NUTRIENT LOSSES PREDICTED BY SWAT 0 0 0 0 3 4 4 4
Impact of U.S. Agricultural Policy on Regional Nitrogen Losses [Poster Papers] 0 0 0 0 0 1 2 40
Impacts of climate change on hydrology, water quality and crop productivity in the Ohio-Tennessee River Basin 0 0 0 0 0 1 3 5
Interactive APEX (i_APEX) User's guide using APEX2110 and APEX0806 0 0 0 8 0 1 5 52
LUMINATE: linking agricultural land use, local water quality and Gulf of Mexico hypoxia 0 0 0 2 2 2 4 31
Land Use Change in a Biofuels Hotspot: The Case of Iowa, Usa 0 0 0 0 3 3 7 78
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 4 11 205
Late-1990s Climate Shift Impact on Corn Yield in Iowa 0 0 0 0 1 2 7 8
Least Cost Control of Agricultural Nutrient Contributions to the Gulf of Mexico Hypoxic Zone 0 0 0 0 0 3 6 95
Least-cost control of agricultural nutrient contributions to the Gulf of Mexico hypoxic zone 0 0 0 0 1 2 5 5
Livestock Pollution: Lessons from the European Union [Socioeconomic Considerations Section] 0 0 0 0 2 2 3 16
Metamodeling Approach to Evaluate Agricultural Policy Impact on Soil Degradation in Western Canada (A) 0 0 0 11 1 1 3 176
Metamodels and Nonpoint Pollution Policy in Agriculture 0 0 0 31 0 0 5 181
Metamodels and Nonpoint Pollution Policy in Agriculture 0 0 0 33 1 1 5 271
Metamodels and nonpoint pollution policy in agriculture 0 0 0 0 1 2 6 15
Moving from Theory to Implementation 0 0 0 0 2 3 5 15
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 4 181
Nonpoint Source Needs Assessment for Iowa Part II: the Cost of Improving Iowa’s Water Quality 0 0 1 1 1 2 14 16
Nonpoint Source Needs Assessment for Iowa Part III: Economic and Environmental Outcomes 0 0 0 0 1 1 5 9
Optimal Placement of Conservation Practices Using Genetic Algorithm with SWAT 0 0 0 0 0 1 3 3
Optimal Placement of Conservation Practices Using Genetic Algorithm with SWAT 0 0 0 15 1 2 5 82
Pesticide Fate Research Trends Within a Strict Regulatory Environment: The Case of Germany 0 0 0 0 1 1 2 78
Pesticide Fate Research Trends within a Strict Regulatory Environment: The Case of Germany 0 0 0 8 2 2 3 77
Placing bounds on extreme temperature response of maize 0 0 1 2 1 2 5 8
Potential Adoption of Managed Aquifer Recharge Systems in the Corn Belt Region 0 0 0 0 4 7 11 20
Privatizing Ecosystem Services: Water Quality Effects from a Carbon Market 0 0 0 0 0 0 1 67
Privatizing Ecosystem Services: Water Quality Effects from a Carbon Market 0 0 0 0 2 3 6 10
RAPS 1996: Agricultural and Environmental Outlook 0 0 0 0 3 4 6 43
RAPS 1997: Agricultural and Environmental Outlook 0 0 0 0 2 3 7 51
REGIONAL ESTIMATION OF SOIL CARBON AND OTHER ENVIRONMENTAL INDICATORS USING EPIC AND I_EPIC 0 0 0 0 2 3 6 10
Regional Estimation of Soil Carbon and Other Environmental Indicators Using EPIC and i_EPIC 0 0 0 41 3 3 5 215
Relation Between Local Climatology and Odor Transport 0 0 0 0 2 2 6 14
Sny Magill Watershed Modeling Project: Final Report 0 0 0 9 2 2 4 121
Soil and Water Assessment Tool: Historical Development, Applications, and Future Research Directions, The 0 0 0 217 4 6 21 979
The Agricultural Policy Environmental EXtender (APEX) Model: An Emerging Tool for Landscape and Watershed Environmental Analyses 0 0 1 7 3 3 8 83
The Allocation of Nutrient Load Reduction Across a Watershed: Assessing Delivery Coefficients As an Implementation Tool 0 0 0 54 0 1 10 257
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 2 3 5 5
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 9 12
The Cost of Cleaner Water: Assessing Agricultural Pollution Reduction at the Watershed Scale 0 0 0 0 2 2 9 189
The Designation of Co-benefits and Its Implication for Policy: Water Quality versus Carbon Sequestration in Agricultural Soils 0 0 0 0 4 5 7 7
The Economics of Dead Zones: Causes, Impacts, Policy Challenges, and a Model of the Gulf of Mexico Hypoxic Zone 0 0 0 6 2 2 4 27
The Economics of Dead Zones: Linking Externalities from the Land to their Consequences in the Sea 0 0 0 0 2 3 7 7
The Optimality of Using Marginal Land for Bioenergy Crops: Tradeoffs between Food, Fuel, and Environmental Services 0 0 0 1 0 0 4 8
The Soil and Water Assessment Tool: Historical Development, Applications, and Future Research Directions 0 0 0 0 3 4 9 9
The Soil and Water Assessment Tool: Historical Development, Applications, and Future Research Directions 0 0 0 2 3 6 15 29
The Urgent Need to Address Nutrient Imbalance Problems in Iowa's High-Density Livestock Regions 0 0 0 9 1 4 7 20
The Water Quality Effects of Corn Ethanol vs Switchgrass Based Biofuels in the Midwest 0 0 0 60 3 4 10 311
The Water Quality Effects of Corn Expansion in the Midwest 0 0 0 0 0 0 5 76
Transfers and Environmental Co-Benefits of Carbon Sequestration in Agricultural Soils: Retiring Agricultural Land in the Upper Mississippi River Basin 0 0 0 56 0 3 14 277
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 1 9 21
Upper Mississippi River Basin Modeling System Part 3: Conservation Practice Scenario Results 0 0 0 0 2 2 8 192
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 2 2 6 41
Using a coupled simulation-optimization approach to design cost-effective reverse auctions for watershed nutrient reductions 0 0 0 15 4 6 10 74
Validation of EPIC for Two Watersheds in Southwest Iowa 0 0 0 0 0 0 0 0
Validation of EPIC for Two Watersheds in Southwest Iowa 0 0 0 25 1 2 9 124
Validation of Epic for Two Watersheds in Southwest Iowa 0 0 0 0 2 2 8 72
Water Quality Modeling for the Raccoon River Watershed Using SWAT 1 1 2 2 2 3 4 4
Water Quality Modeling for the Raccoon River Watershed Using SWAT 0 0 0 119 2 4 11 499
Total Working Papers 3 5 24 2,076 202 315 834 15,529
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 0 0 5 17
A Tale of Three Watersheds: Nonpoint Source Pollution and Conservation Practices across Iowa 0 0 0 8 1 2 5 38
An Improved Reverse Auction for Addressing Water Quality in Agricultural Watersheds Using Coupled Simulation-Optimization Models 0 0 0 24 2 3 6 128
Carbon Sequestration, Co-Benefits, and Conservation Programs 0 0 1 5 2 3 14 79
Climate Change Impacts on Surface Runoff and Nutrient and Sediment Losses in Buchanan County, Iowa 0 0 0 1 2 2 5 14
Environmental conservation in agriculture: Land retirement vs. changing practices on working land 0 0 1 37 3 4 11 180
Evaluating the tradeoff between cost effectiveness and participation in agricultural conservation programs 0 0 0 2 2 4 14 25
Evaluation of Long-Term SOC and Crop Productivity within Conservation Systems Using GFDL CM2.1 and EPIC 0 0 0 2 4 4 10 54
Evaluation of flood metrics across the Mississippi-Atchafalaya River Basin and their relation to flood damages 0 0 0 0 4 7 9 9
Evaluation of the performance of the EPIC model for yield and biomass simulation under conservation systems in Cambodia 0 0 1 16 5 7 14 104
Field scale SWAT+ modeling of corn and soybean yields for the contiguous United States: National Agroecosystem Model Development 0 0 0 1 1 2 11 23
Integrated assessment of nitrogen runoff to the Gulf of Mexico 0 0 0 1 2 2 13 20
Integrated ecological-economic modelling of water pollution abatement management options in the Upper Ems River Basin 0 0 0 68 0 2 12 300
LUMINATE: linking agricultural land use, local water quality and Gulf of Mexico hypoxia 0 0 0 6 3 5 11 48
Privatizing Ecosystem Services: Water Quality Effects from a Carbon Market 0 0 0 9 2 4 11 53
Simulated Climate Change Impacts on Corn and Soybean Yields in Buchanan County, Iowa 0 0 0 1 0 2 12 24
Simulated Ecosystem and Farm-Level Economic Impacts of Conservation Tillage in a Northeastern Iowa County 0 0 0 0 2 3 8 14
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 1 3 13 94
The Economics of Dead Zones: Causes, Impacts, Policy Challenges, and a Model of the Gulf of Mexico Hypoxic Zone 0 0 0 24 2 3 13 160
The Optimality of Using Marginal Land for Bioenergy Crops: Tradeoffs between Food, Fuel, and Environmental Services 0 0 0 4 0 1 6 24
The urgency of transforming the Midwestern U.S. landscape into more than corn and soybean 0 0 0 0 1 4 9 35
U.S.–China agricultural trade and environmental outcomes: The case of nutrient runoff to the Gulf of Mexico 0 1 1 1 1 2 4 4
Total Journal Articles 0 1 5 220 40 69 216 1,447

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 3 4 5 29
Corn Stover Harvesting: Potential Supply and Water Quality Implications 0 0 0 0 2 2 3 9
Total Chapters 0 0 0 5 5 6 8 38

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Statistics updated 2026-05-06