Philip W. Gassman
CARD Associate Scientist
Contact Information
Iowa State University560A Heady Hall
Ames, IA 50011
(515) 294-6313
pwgassma@iastate.edu
Personal Website
ISU Economics Working Papers Series
- Feng, Hongli; Jha, Manoj; Gassman, Philip W., The Allocation of Nutrient Load Reduction Across a Watershed: Assessing Delivery Coefficients As an Implementation Tool, Review of Agricultural Economics Vol. 31 (Spring 2009): 183-204. (WP #06013, March 2006)
Journal Articles
- Kling, Catherine L.; Secchi, Silvia; Jha, Manoj; Kurkalova, Lyubov A.; Gassman, Philip W., The Water Quality Effects of Corn Expansion in the Midwest, Forthcoming in Ecological Applications
- Secchi, Silvia; Kurkalova, Lyubov A.; Gassman, Philip W.; Hart, Chad E., Land Use Change in a Biofuels Hotspot: The Case of Iowa, Usa, Biomass and Bioenergy Vol. 35 no. 6 (June 2011): 2391-2400.
- Rabotyagov, Sergey S.; Campbell, Todd; Jha, Manoj; Gassman, Philip W.; Arnold, Jeffrey G.; Kurkalova, Lyubov A.; Secchi, Silvia; Feng, Hongli; Kling, Catherine L., Least Cost Control of Agricultural Nutrient Contributions to the Gulf of Mexico Hypoxic Zone, Ecological Applications Vol. 20 no. 6 (September 2010): 1452-1555.
- Feng, Hongli; Jha, Manoj; Gassman, Philip W., The Allocation of Nutrient Load Reduction Across a Watershed: Assessing Delivery Coefficients As an Implementation Tool, Review of Agricultural Economics Vol. 31 (Spring 2009): 183-204. (WP #06013, March 2006)
- Feng, Hongli; Kurkalova, Lyubov A.; Kling, Catherine L.; Gassman, Philip W., Transfers and Environmental Co-Benefits of Carbon Sequestration in Agricultural Soils: Retiring Agricultural Land in the Upper Mississippi River Basin, Climatic Change Vol. 80 (January 1 2007): 91-107. (CARD Working Paper #05-WP 384)
- Secchi, Silvia; Kling, Catherine L.; Feng, Hongli; Gassman, Philip W.; Jha, Manoj; Campbell, Todd; Kurkalova, Lyubov A., The Cost of Cleaner Water: Assessing Agricultural Pollution Reduction at the Watershed Scale, Journal of Soil and Water Conservation Vol. 62 (2007): 10-20.
- Feng, Hongli; Kurkalova, Lyubov A.; Kling, Catherine L.; Gassman, Philip W., Environmental Conservation in Agriculture: Land Retirement Versus Changing Practices on Working Land, Journal of Environmental Economics and Management Vol. 52 (2006): 600-614. (CARD Working Paper #04-WP 365)
- Feng, Hongli; Kling, Catherine L.; Kurkalova, Lyubov A.; Secchi, Silvia; Gassman, Philip W., Conservation Reserve Program in the Presence of a Working Land Alternative: Implications for Environmental Quality, Program Participation, and Income Transfer, The, American Journal of Agricultural Economics Vol. 87 (December 2005): 1231-1238. (CARD Working Paper #05-WP 402)
- Feng, Hongli; Kling, Catherine L.; Gassman, Philip W., Carbon Sequestration, Co-Benefits, and Conservation Programs, Choices (Third Quarter 2004): 19-23.
- Burkart, Michael R.; Gassman, Philip W.; Moorman, Thomas B.; Singh, Piyush, Estimating Atrazine Leaching in the Midwest, Journal of the American Water Resources Association Vol. 35 no. 5 (October 1 1999): 1089-1100.
- Chung, S. W.; Gassman, Philip W.; Kramer, L. A.; Williams, J. R.; Gu, Roy, Validation of Epic for Two Watersheds in Southwest Iowa, Journal of Environmental Quality Vol. 28 no. 3 (May/June 1999): 971-979.
- Lakshminarayan, P. G.; Gassman, Philip W.; Bouzaher, Aziz; Izaurralde, R. Cesar, Metamodeling Approach to Evaluate Agricultural Policy Impact on Soil Degradation in Western Canada (A), Canadian Journal of Agricultural Economics Vol. 44 no. 3 (November 1996): 277-294.
- Kiniry, James R.; Major, D. J.; Izarralde, R. C.; Williams, J. R.; Gassman, Philip W.; Morrison, M.; Bergentine, R.; Zentner, R. P., Epic Model Parameters for Cereal, Oilseed, and Forage Crops in the Northern Great Plains Region, Canadian Journal of Plant Science Vol. 75 (1995): 679-688.
- Gassman, Philip W., Pesticide Fate Research Trends Within a Strict Regulatory Environment: The Case of Germany, Journal of Soil and Water Conservation Vol. 48 no. 3 (May 1 1993): 178-187.
- Bouzaher, Aziz; Lakshminarayan, P. G.; Cabe, Richard; Carriquiry, Alicia L.; Gassman, Philip W.; Shogren, Jason F., Metamodels and Nonpoint Pollution Policy in Agriculture, Water Resources Research Vol. 29 no. 6 (1993): 1579-1587.
- Kiniry, James R.; Williams, J. R.; Gassman, Philip W.; Debacke, P., General, Process-Oriented Model for Two Competing Plant Species (A), Transactions of the American Society of Agricultural Engineers Vol. 35 no. 3 (1992): 801-810.
CARD Publications
October 2012
Economics of Dead Zones: Linking Externalities from the Land to their Consequences in the Sea, The
Sergey Rabotyagov, Catherine L. Kling, Philip W. Gassman, Nancy N. Rabalais, R. Eugene Turner
[12-WP 534]
July 2009
Optimal Placement of Conservation Practices Using Genetic Algorithm with SWAT
Manoj Jha, Sergey Rabotyagov, Philip W. Gassman
[09-WP 496]
April 2009
Agricultural Policy Environmental EXtender (APEX) Model: An Emerging Tool for Landscape and Watershed Environmental Analyses, The
Philip W. Gassman, Jimmy R. Williams, Xiuying Wang, Ali Saleh, Edward Osei, Larry M. Hauck, R. César Izaurralde, Joan D. Flowers
[09-TR 49]
October 2008
Sny Magill Watershed Modeling Project: Final Report
Ali Saleh, Philip W. Gassman, Catherine L. Kling
[01-SR 95]
(Revised)
February 2008
Comparison of Land Use Area Estimates from Three Different Data Sources for the Upper Mississippi River Basin
Chinnasamy Santhi, Philip W. Gassman, Silvia Secchi, Raghavan Srinivasan
[08-TR 48]
February 2007
Soil and Water Assessment Tool: Historical Development, Applications, and Future Research Directions, The
Philip W. Gassman, Manuel R. Reyes, Colleen H. Green, Jeffrey G. Arnold
[07-WP 443]
August 2006
Water Quality Modeling for the Raccoon River Watershed Using SWAT
Manoj Jha, Jeffrey G. Arnold, Philip W. Gassman
[06-WP 428]
August 2005
Conservation Reserve Program in the Presence of a Working Land Alternative: Implications for Environmental Quality, Program Participation, and Income Transfer, The
Hongli Feng, Catherine L. Kling, Lyubov A. Kurkalova, Silvia Secchi, Philip W. Gassman
[05-WP 402]
June 2005
Historical Development and Applications of the EPIC and APEX Models
Philip W. Gassman, Jimmy R. Williams, Verel W. Benson, R. César Izaurralde, Larry M. Hauck, C. Allan Jones, Jay D. Atwood, James Kiniry, Joan D. Flowers
[05-WP 397]
Calibration and Validation of SWAT for the Upper Maquoketa River Watershed
Pipat Reungsang, Ramesh Kanwar, Manoj Jha, Philip W. Gassman, Khalil Ahmad, Ali Saleh
[05-WP 396]
March 2005
Designation of Co-benefits and Its Implication for Policy: Water Quality versus Carbon Sequestration in Agricultural Soils, The
Silvia Secchi, Manoj Jha, Lyubov A. Kurkalova, Hongli Feng, Philip W. Gassman, Catherine L. Kling
[05-WP 389]
February 2005
Economic and Environmental Co-benefits of Carbon Sequestration in Agricultural Soils: Retiring Agricultural Land in the Upper Mississippi River Basin
Hongli Feng, Lyubov A. Kurkalova, Catherine L. Kling, Philip W. Gassman
[05-WP 384]
November 2004
Carbon Sequestration, Co-Benefits, and Conservation Programs
Hongli Feng, Catherine L. Kling, Philip W. Gassman
[04-WP 379]
June 2004
Environmental Conservation in Agriculture: Land Retirement versus Changing Practices on Working Land
Hongli Feng, Lyubov A. Kurkalova, Catherine L. Kling, Philip W. Gassman
[04-WP 365]
January 2004
Climate Change Sensitivity Assessment on Upper Mississippi River Basin Streamflows Using SWAT
Manoj Jha, Jeffrey G. Arnold, Philip W. Gassman, Roy Gu
[04-WP 353]
April 2003
Regional Estimation of Soil Carbon and Other Environmental Indicators Using EPIC and i_EPIC
Philip W. Gassman, Todd Campbell, R. César Izaurralde, Allison M. Thomson, Jay D. Atwood
[03-TR 46]
October 2002
Effect of Watershed Subdivision on SWAT Flow, Sediment, and Nutrient Predictions
Manoj Jha, Philip W. Gassman, Silvia Secchi, Roy Gu, Jeffrey G. Arnold
[02-WP 315]
(Revised)
March 2000
Evaluation of EPIC for Three Minnesota Cropping Systems
S. W. Chung, Philip W. Gassman, D. R. Huggins, G. W. Randall
[00-WP 240]
March 1999
Validation of EPIC for Two Watersheds in Southwest Iowa
S. W. Chung, Philip W. Gassman, L. A. Kramer, Jimmy R. Williams, Roy Gu
[99-WP 215]
October 1998
Estimating Atrazine Leaching in the Midwest
Michael R. Burkart, Philip W. Gassman, Thomas B. Moorman, Piyush Singh
[98-WP 201]
July 1997
National Pilot Program Integrated Modeling System: Environmental Baseline Assumptions and Results for the APEX Model. Livestock Series Report 9, The
Philip W. Gassman
[97-SR 85]
November 1996
Environmental Component of the National Pilot Project Integrated Modeling System. Livestock Series Report 8, The
Philip W. Gassman, Larry M. Hauck
[96-SR 84]
August 1996
Agricultural Policies and Soil Degradation in Western Canada: An Agro-Ecological Economic Assessment. Report 5: Project Summary
Aziz Bouzaher, Jason F. Shogren, Derald Holtkamp, Philip W. Gassman, David Archer, P. G. Lakshminarayan, Alicia L. Carriquiry, Randall Reese, Dharmaraju Kakani, William H. Furtan, R. César Izaurralde, James Kiniry
[96-SR 83]
July 1996
Agricultural Policies and Soil Degradation in Western Canada: An Agro-Ecological Economic Assessment. Report 4: Modifications to CRAM and Policy Evaluation Results
Aziz Bouzaher, Jason F. Shogren, Derald Holtkamp, Philip W. Gassman, David Archer, P. G. Lakshminarayan, Alicia L. Carriquiry, Randall Reese, Dharmaraju Kakani, William H. Furtan, R. César Izaurralde, James Kiniry
[96-SR 82]
March 1995
Agricultural Policies and Soil Degradation in Western Canada: An Agro-Ecological Economic Assessment. Report 3. The Integration of the Environmental and Economic Components.
Aziz Bouzaher, Jason F. Shogren, Derald Holtkamp, Philip W. Gassman, David Archer, P. G. Lakshminarayan, Alicia L. Carriquiry, Randall Reese, William H. Furtan, R. César Izaurralde, James Kiniry
[95-SR 75]
September 1994
Corn and Sorghum Herbicides and Water Quality: An Evaluation of Alternative Policy Options, CEEPES Project Research Memo 7
P. G. Lakshminarayan, Aziz Bouzaher, Toshitsugu Otake, Todd Campbell, Philip W. Gassman
[94-SR 70]
August 1994
Agricultural Policies and Soil Degradation in Western Canada: An Agro-Ecological Economic Assessment, Report 2: The Environmental Modeling System
Aziz Bouzaher, Jason F. Shogren, Derald Holtkamp, Philip W. Gassman, David Archer, P. G. Lakshminarayan, Alicia L. Carriquiry, Randall Reese
[94-SR 69]
December 1993
Atrazine and Water Quality: An Evaluation of Restricting Atrazine Use on Corn and Sorghum to Postemergent Applications, CEEPES Atrazine Project Research Memo 6
Aziz Bouzaher, Derald Holtkamp, P. G. Lakshminarayan, Philip W. Gassman, Randall Reese, Todd Campbell
[93-SR 68]
October 1993
Agricultural Policies and Soil Degradation in Western Canada: An Agro-Ecological Economic Assessment, Report 1: Conceptual Framework
Aziz Bouzaher, Philip W. Gassman, Derald Holtkamp, David Archer, Alicia L. Carriquiry, Jason F. Shogren, Randall Reese, P. G. Lakshminarayan, William H. Furtan, R. César Izaurralde, James Kiniry
[93-SR 65]
December 1992
Atrazine and Water Quality: An Updated CEEPES Analysis, CEEPES Atrazine Project Research Memo 5
Aziz Bouzaher, Richard Cabe, Jason F. Shogren, Alicia L. Carriquiry, Derald Holtkamp, Philip W. Gassman, David Archer, P. G. Lakshminarayan, Todd Campbell, Qingbin Wang, Andrew Manale, Robert Taylor
[92-SR 59]
August 1992
Metamodels and Nonpoint Pollution Policy in Agriculture
Aziz Bouzaher, Richard Cabe, Alicia L. Carriquiry, Philip W. Gassman, P. G. Lakshminarayan, Jason F. Shogren
[92-WP 97]
February 1992
Pesticide Fate Research Trends within a Strict Regulatory Environment: The Case of Germany
Philip W. Gassman
[92-WP 89]
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