1978, Kansas State University, Ph.D., Agronomy
1974, Oregon State University, M.S., Soil Physics
1973, Oregon State University, B.S., General Agriculture
Current responsibilities are centered around development or adaptation and testing of crop growth models for the major irrigated field crops grown in the Pacific Northwest. The individual crop models are to be integrated together with models for other components of the irrigated agricultural system, including erosion and run-off models, weed, insect and disease models, tillage models, and soil components models to form a conservation cropping system model.
Past work has included selection, installation, and adaptation of crop growth simulation models for operational yield forecasting, selecting and processing data for the models, and training visiting scientists to use the models in foreign countries. General experience covers crop physiology, agroclimatology, cropping practices, computer programming, data storage and manipulation, remote sensing, use of GIS and GPS techniques, and some mathematics, statistics, biochemistry, physics, chemistry, hydrology, and soil physics.
Recent accomplishments include:
Development of the SIMPOTATO model for simulation of potato growth and development and scheduling of irrigation and fertilization (http://www.tricity.wsu.edu/htmls/hodges).
Adaptation of CERES maize and wheat models to the Pacific Northwest, addition of irrigation and nitrogen fertilization scheduling modules to the these models, restructuring of the model programs into a form suitable for integrating into a single model.
Development of the LIGHTINT model to calculate individual plant light interception for the CERES maize model.
Establishment of the internet email discussion group, SUSTAG-L on the "Principles of Sustainable Agriculture".
Other work has included design of operational yield forecasting systems for the U.S.A. based on the CERES-Maize model and for the U.S.S.R. based on the CERES-Wheat model.
Modification and testing of the CERES-Wheat, CERES-Maize, TAMW, and SOYGRO crop growth simulation models.
Development of SOYPHEN, a soybean growth-stage simulation model.
Design of a field experiment for soil moisture measurement.
Processing of historical phenology data to generate normal crop calendars in the U.S.
Analysis of spectral (satellite) data in order to estimate phenological stages for spring small grains.
Cropping System Analyst 1985-1997 (12 years) USDA-Agricultural Research Service
Developing, testing, and adapting models of components of irrigated cropping systems for integration into an irrigated cropping system model linked to a GIS/GPS system for delivering management prescriptions. Conducting field experiments, as needed, to develop and verify component models.
Research Associate 1981-1985 (4-1/2 years) University of Missouri-Columbia
Acquiring, modifying, testing, and applying crop growth simulation models for large area yield forecasting. Developing, as needed, computer program modules to store and read meteorological, soil, and crop data, to estimate solar radiation, to estimate growth stages, and to present model results in various formats.
Senior Scientist 1978-1981 (3-1/2 years) LEMSCO/NASA-JSC
Developing meteorological and spectral (satellite) based phenology models to estimate crop growth stages. Developing yield models incorporating wide area soil moisture estimates. Processing historical crop phenology data to estimate normal crop growth stage dates.
Research Assistant 1974-1978 (3-1/2 years) Kansas State University
Research to develop growth and yield models for winter wheat and grain sorghum. Photosynthesis and respiration measurements on stands of wheat, sorghum, and soybeans.
Teaching Assistant 1973-1974 (1/2 year) Oregon State University
Teaching recitation classes for a general soil science course, and doing research on the response of grain sorghum seedlings to water stress.
Laboratory Assistant 1972-1973 (1 year) Oregon State University
Teaching laboratory sections for a general soil science course, and helping with field and greenhouse research projects.
American Society of Agronomy
ASA Computer Software Applications Committee (1987-1989, Chair 1994-present)
ASA Electronic Communications Feasibility Committee, A 301.6 (1992-present)
ASA Electronic Journal Subcommittee (1992-present)
INTERNET Mailing Group on Principles of Sustainable Agriculture (moderator, 1993-present)
The incumbent received a grant from the Washington State Potato Commission for $20,000 for developing data sets for modeling the effects of water and nitrogen stresses on tuber quality of potatoes and for tillage studies.
I plan to continue to work in the area of modeling processes in cropping system and their interactions. A major impediment to designing cropping systems based on sustainable management practices is our poor understanding of many of the interactions between the various processes in agricultural systems. I am interested in developing and applying cropping systems models for assessing sustainability of farming systems, for making management decisions on an individual field level, and for assessing potential productivity of cropping systems.
Dr. Edward T. Kanemasu, Regents Professor and Director of International Agronomy, University of Georgia, College of Agriculture and Environmental Sciences, 107 Conner Hall, Athens, Georgia 30602- 7503, 706-542-2151
Dr. Basil Acock, USDA-ARS, Systems Research Laboratory, Beltsville, MD 20705, 301-504-5872
Dr. Cynthia Rosenzweig, NASA/Goddard Institute for Space Studies and Columbia University, 2880 Broadway, New York NY 10025, 212-678-5591, email: [email protected]
Dr. Sharon LeDuc, Mail Drop 80, US EPA, Research Triangle Park, NC 27711, 919-541-1335
Dr. Paul Doraiswamy, USDA-ARS, Remote Sensing Lab, BARC Building 001, Beltsville, MD, 301-504- 6576
Dr. Goro Uehara, IBSNAT, 2500 Dole St, Krause Hall, Room 21, University of Hawaii, Honolulu, HA 96822, 808-956-6604
Dr. Laj Ahuja, USDA-ARS-NPA, 301 S Howes, PO Box E, Ft. Collins, CO, 80526, 303-490-8315
Modeling Dry Matter Production of Winter Wheat. Agronomy Journal 69:974-978. 1977. T. Hodges and E. T. Kanemasu.
Modeling Growth and Yield of Grain Sorghum. Canadian Journal of Plant Science, 59:803-818. 1979. T. Hodges, E. T. Kanemasu, and I. D. Teare.
Comparative Testing of Three Wheat Phenology Models. Agronomy Journal 77:170-171. 1985. V. French and T. Hodges.
Soybean Phenology Model Based on Temperature, Daylength, and Water Stress. Agronomy Journal 77:500-505. 1985. T. Hodges and V. French.
Using Climatic Data for Estimating Representativeness and Testing Crop Simulation Models. In International Crops Research Institute for the Semi-Arid Tropics. Proceedings of the International Symposium on Minimum Data Sets for Agrotechnology Transfer, 21-26 March 1983, ICRISAT Center, India. Patancheru, A.P. 502 324, India: ICRISAT. C. Sakamoto, T. Phillips, and T. Hodges.
Ravelo, Andres C., Ana M. Planchuelo-Ravelo, and Tom Hodges. 1985. A simulation barley model for assessing climatic impact and agricultural practices in Galte and Chauzan area. Contribution to "Assessment of Climate Impacts on Agriculture in Semi-Arid Regions." Vol 2. International Institute for Applied System Analysis, Laxenburg, Austria. June 1985.
Using the CERES-Maize Model to Estimate Production for the U. S. Cornbelt. Agricultural and Forest Meteorology 40:293-303. 1987. T. Hodges, D. Botner, C. Sakamoto, and J. Hays Haug.
Manrique, L. A. and T. Hodges. 1989. Estimation of tuber initiation in potatoes grown in tropical environments based on different methods of computing thermal time. American Potato Journal 66:425- 436.
Hodges, T. and D. W. Evans. 1990. Light interception model for corn. Journal of Production Agricultural 3:190-195.
Hodges, T., Ed. 1990. Predicting Crop Phenology. CRC Press, Boca Raton, Florida.
Hodges, T. and J. T. Ritchie. 1990. The CERES-Wheat phenology model. In Predicting Crop Phenology. T. Hodges, Ed. CRC Press, Boca Raton, Florida.
Hodges, T. 1990. Temperature and water stress effects on phenology. In Predicting Crop Phenology. T. Hodges, Ed. CRC Press, Boca Raton, Florida.
Hodges, T. 1990. Modeling and programming philosophies. In Predicting Crop Phenology. T. Hodges, Ed. CRC Press, Boca Raton, Florida.
Hodges, T. 1990. Crop growth simulation and the role of phenological models. In Predicting Crop Phenology. T. Hodges, Ed. CRC Press, Boca Raton, Florida.
Manrique, L. A., T. Hodges, and B. S. Johnson. 1990. Genetic variables for potato. American Potato Journal 67:669-683.
Manrique, L. A., J. R. Kiniry, T. Hodges, and D. S. Axness. 1991. Dry matter production and radiation interception of potato. Crop Science 31:1044-1049.
Manrique, L. A. and T. Hodges. 1991. Development and growth of tropical maize at two elevations in Hawaii. Agronomy Journal 83:305-310.
Hodges, T. 1992. FORTRAN graphics library for PC-based crop simulation models. Agronomy Journal 84:124-128.
Hodges, T. and D. W. Evans. 1992. Leaf emergence and leaf duration related to thermal time calculations in CERES-Maize. Agronomy Journal 84:724-730.
Hodges, T., S. L. Johnson, and B. S. Johnson. 1992. SIMPOTATO: A highly modular program structure for an IBSNAT style crop simulation. Agronomy Journal 84:911-915.
Han, S., R. G. Evans, T. Hodges, and S. L. Rawlins. 1995. Linking a geographic information system with a potato simulation model for site-specific crop management. J. Environ. Qual. 24:772-777.
Rozenzweig, C., J. Phillips, R. Goldberg, J. Carroll, and T. Hodges. 1996. Potential impacts of climate change on citrus and potato production in the US. Agricultural Systems Journal 52:455-479.
Crop Phenology Literature Review for Corn, Soybean, Wheat, Barley, Sorghum, Rice, Cotton, and Sunflower. Technical Memorandum LEC-13722, JSC-16088, November 1979. T. Hodges and P. C. Doraiswamy.
Crop Yield Literature Review for Corn, Soybean, Wheat, Barley, Sorghum, Rice, Cotton, and sunflower. Technical Memorandum LEC-13791, JSC-16320, December 1979. P. C. Doraiswamy, T. Hodges, and D. E. Phinney.
Variability of Crop Calendar Stage Dates. Technical Report LEMSCO-14070, JSC-16309, January 1980. M. L. Sestak, T. Hodges, and J. A. Artley.
Interpretation of Landsat Digital Data Using a Cubic Color Model Based on Relative Energies. Technical Report, LEMSCO- 13499, JSC-13776, February 1980. R. B. Cate, D. E. Phinney, M. C. Kinsler, M. L. Sestak, T. Hodges, and J. T. Dishler.
Preliminary Evaluation of Spectral, Normal, and Meteorological Crop Stage Estimation Approaches. Technical Report, LEMSCO-14640, July 1980. R. B. Cate, J. A. Artley, P. C. Doraiswamy, T. Hodges, M. C. Kinsler, D. E. Phinney, and M. L. Sestak.
Crop Calendars for the U.S., USSR, and Canada in Support of the Early Warning Project. Technical Report, LEMSCO-14673, JSC-16359, July 1980. T. Hodges, M. L. Sestak, and M. H. Trenchard.
Canadian Crop Calendars in Support of the Early Warning Project. Technical Report, LEMSCO-14676, JSC-16376, August 1980. T. Hodges and M. L. Sestak.
U.S. Crop Calendars in Support of the Early Warning Project. Technical Report, LEMSCO-14674, August 1980. T. Hodges, M. L. Sestak, and M. H. Trenchard.
USSR Crop Calendars in Support of the Early Warning Project. Technical Report, LEMSCO-14675, August 1980. T. Hodges, M. L. Sestak, and M. H. Trenchard.
Analysis of U.S. Spring Wheat and Spring Barley Periodic Ground Truth. Technical Report, LEMSCO- 14070, JSC-16837, June 1981. T. Hodges.
Spring Small Grains Planting Date Distribution Model. Technical Report, LEMSCO-16018, JSC-16858, March 1981. T. Hodges and J. A. Artley.
User Guide to Spring Small Grains Planting Date Distribution Model. Technical Report, LEMSCO-16669, JSC-17410, August 1981. T. Hodges and J. A. Artley.
Second Generation Yield Models Literature Review. Technical Report, YM-12-04306, JSC-18245, March 1982. T. Hodges.
NOAA-AISC User's Guide for Implementing CERES-Maize Model for Large Area Yield Estimation. Technical Report, YM-15- 00401, JSC-20237. (This and the following reports describe the models' implementation on the NOAA/NESDIS computer for the Department of Commerce). 1984. J. A. Larrabee and T. Hodges.
NOAA-AISC User's Guide for Implementing CERES-Wheat Model for Large Area Yield Estimation. Technical Report, YM-15- 00401, JSC-20236. 1984. J. A. Larrabee and T. Hodges.
User's Guide to TAMW Model as Implemented on the IBM 360/195 Computer. Technical Report, YM-15- 00402, JSC-20238. 1984. J. A. Larrabee and T. Hodges.
Simulating Solar Radiation for Crop Growth Simulation Models Technical Report, YM-15-00403, JSC- 20239. 1985. T. Hodges, V. French, and S. K. LeDuc.
SOYPHEN User's Guide. Technical Report, YM-15-00406, JSC- 20242. 1985. Tom Hodges and Vikki French.
Hodges, T. Using the CERES-Maize model to estimate maize production for the U. S. cornbelt. Agron. Abst., p. 12. 1985. (Abstract)
van Dyke, A. and Hodges, T. Linking satellite information and crop simulation models. Agron. Abst., p. 15. 1985. (Abstract)
Botner, D. M., Sakamoto, C. M., Hodges, T., Hayes Haug, J. A., LeDuc, S. K., Young, R. E., and Womack, A. The CERES- Maize model: 1985 operational test for the U.S. cornbelt. Final Report. 1985 Crop Weather Indices for the U.S. Cornbelt. February 1986. (Final Report)
Botner, D. M., Sakamoto, C. M., Hodges, T., Hayes Haug, J. A., and LeDuc. S. K. The CERES-Maize model: 1985 operational test for the U.S. cornbelt. Ninth Ann. Workshop on Crop Simulation, Program and Abstracts, p. 2., March 10-12, 1986. (Abstract)
Hodges, T. Adapting CERES-Maize for scheduling sprinkler irrigation and fertilization of irrigated corn in the Pacific Northwest. Agron. Abst., p. 14. 1986. (Abstract)
Hodges, T., Magnussen, D., and Ritchie, J. T. A proposed algorithm for nitrogen control of carbon partitioning between tops, roots, and tubers of potato. Tenth Ann. Workshop on Crop Simulation, Program and Abstracts, p. 9. March 3-5, 1987. (Abstract)
Hodges, T. Proposed changes in leaf/stem partitioning, leaf size, and row spacing responses for CERES- Maize. Agron. Abst., p. 13. 1987. (Abstract)
Hodges, T. and Ewing, E. An algorithm integrating the effects of photoperiod, light intensity, mean and daily range of temperature, and leaf area on tuberization of potato. Workshop on Crop Simulation, Program and Abstracts, p. 4. March 28-30, 1989, Univ. Ill., Urbana-Champaign, IL. (Abstract)
T. Hodges, B. S. Johnson, and L. A. Manirique. SUBSTOR: A Model of Potato Growth and Development. Agronomy Abstracts, p16. 1989. (Abstract)
Hodges, T. 1989. The role of crop simulation models in managing irrigation water. USDA-ARS Workshop on Managing Irrigation Water in the West, Oct. 29 - Nov. 1, 1989, Mesa, Arizona. Invited Paper.
Hodges, T. and Yoder, R. 1991. Using Carbon:Nitrogen Ratio to Control Partitioning for Potatoes. American Potato Journal p. 615 (Abstract)
Doraiswamy, P. C. and T. Hodges. 1991. Assessment of crop condition over large areas by satellite and ground-based models. Agronomy Abstracts, p. 16. (Abstract)
Hodges, T. 1991. A Graphics Library for PC-based Simulation Models written in FORTRAN. Agronomy Abstracts, p. 75. (Abstract)
Hodges, T. 1991. Simulating Carbon and Nitrogen Partitioning in Potato. Agronomy Abstracts, p. 19. (Abstract)
Hodges, T. 1992. Modeling the effects of stress on plant physiology. 22nd Annual Workshop on Crop Simulation, Program and Abstracts, p. 3. March 23-25, 1992, Corpus Christi, TX. (Abstract, Invited paper)
Hodges, T. and B. B. Dean. 1992. Simulating solids content of potato tubers. Agronomy Abstracts, p. 17. (Abstract)
Hanson, J. D. and T. Hodges. 1992. Chapter 3: Plant Growth Processes. In "Root Zone Water Quality Model, Version 1.0, Technical Documentation." GPSR Technical Report No. 2. United States Department of Agriculture, Agricultural Research Service, Great Plains Systems Research Unit. pp. 75-106.
Hodges, T. 1993. Simpotato: A model to simulate potato growth and yield. 23nd Annual Workshop on Crop Simulation, Program and Abstracts. Tempe, AZ, April 5-8, 1993 (Abstract)
Hodges, T. 1993. Comparison of a simple simulation-based strategy for scheduling water and nitrogen to intensive commercial potato production practices. 23nd Annual Workshop on Crop Simulation, Program and Abstracts. Tempe, AZ, April 5-8, 1993 (Abstract)
Hodges, T. 1993. Barriers and suggested policies for implementing an electronic journal from the viewpoint of the author. Agronomy Abstracts (Abstract)
Hodges, T. 1994. Nitrogen mineralization errors in the IBSNAT soil nitrogen model. 24nd Annual Workshop on Crop Simulation, Program and Abstracts. Raleigh, NC, Marcj 15-18, 1994, p. 12. (Abstract)
Hodges, T. 1994. Interfacing crop growth models to GIS for prescription farming. Proceedings 1994 ASPRS/ACSM Annual Convention, April 25-28, 1994, Reno NV, Vol 1, pp 254-255. (Invited paper)
Expert Group Meeting on "The Reliability of Crop-Climate Models for Assessing the Impacts of Climate Change and Variability. WMO/UNEP/ICSU. 21-25 May, 1984, Geneva, Switzerland. Invited expert on model applications.
International Workshop on "Systems Analysis and Crop Simulation for Technology Transfer" for the International Benchmark Soils Network for Agricultural Technology Transfer (IBSNAT) Project. June 17- 27, 1986, Kuala Lumpor, Malaysia. Instructor.
USDA/ARS Workshop on "Water Management in the West". October 29-31, Mesa, Arizona. Panel Participant.
Lectures on "Crop Growth Simulation Modeling". Nanjing Institute of Meteorology. May 10-17, 1990, Nanjing, China. Invited lecturer.
Ritchie, J. T., Johnson, B. S., and Hodges, T. "SUBSTOR - A Functional Model of Potato Growth, Development and Yield". European Association for Potato Research 1st International Workshop on Potato Modeling, May 29-31, 1990, IAC, Wageningen, The Netherlands.
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