Larry Geohring   Senior Extension Associate   Profile	212 Riley Robb   ldg5@cornell.edu   Web site

Biography

Geohring joined Cornell in 1977 to coordinate an interdisciplinary project dealing with water management on agricultural and rural lands in New York State. Having a farm background and prior drainage and irrigation experience working in the Colorado River Basin, my interests in applied research and technology transfer in hydrology and soil and water management complement those of other faculty in the Department of Biological and Environmental Engineering. My engineering and construction skills have also facilitated several drainage and irrigation infrastructure improvements on various Cornell University research farms, providing experiential learning opportunities for students in engineering design classes and benefiting researchers in other Departments. Research interests include managing water quantity and quality for the benefit of agricultural production, society, and the environment; and encompass aspects of soil-water-plant relationships and the fate and transport processes of nutrients and other potential pollutants. My interests in technology transfer and teaching is in identifying, developing, applying, and facilitating natural or engineered solutions to address various soil and water resource management concerns and environmental policy issues, and in encouraging students to broaden their education and horizons to do the same. Gardening, hiking, traveling, listening to music and collecting coins are activities I enjoy in my spare time.

Professional CV

Education

• Completed course work towards Ph.D. in Soil Science at North Dakota State University (1976–1977) on Soil Physics, Soils and Plant Nutrition and Analysis, Advanced Soil and Water Engineering, Regression Statistics, and State and Local Government Finance. Also completed Water Resources Problems and Policy course at Cornell University.
• M.S. in Agricultural Engineering (1976), Colorado State University. Thesis topic: "Optimization of Trickle Irrigation Systems Design". Completed courses on Groundwater Hydraulics and Hydrology, Irrigation Systems and Structures, Drainage, Soil Chemistry, Soil-Plant Relationships, Advanced Engineering Math and Statistical Methods.
• B.S. in Agricultural Engineering (1975), North Dakota State University. Major courses included Soil and Water Conservation Engineering, Irrigation Engineering, Water Supply and Sewage Treatment, Rural/Landscape/Environmental/Farmstead Engineering Design, Advanced Scientific Computer Applications, and Engineering Economy.

Experience

• Senior Extension Associate, Soil and Water Resources Engineering and Management, Cornell University (1990–Present). Conduct an applied research and extension program in agricultural water and soil management and on land use impacts on water quality and wetland resources. Co-teach Water Sampling and Measurement (BEE 427), Water and Landscape Engineering Applications (BEE 474), and Drainage (BEE 672).
• Research/Extension Associate, Water Management Specialist in Drainage and Irrigation, Cornell University (1977–1990). Coordinated Agricultural Water Management Program for New York State with emphasis on evaluating agricultural water and soil management practices and implementing technology transfer to encourage the adoption of appropriate drainage and irrigation practices for production agriculture.
• Graduate Research/Teaching Assistant, Soils Department, North Dakota State University (1976–1977). Performed soil and solute sampling/analysis and experimentation related to the Garrison Diversion Project and taught sections of soil physics and soil and water management engineering courses.
• Research Technician/Graduate Research Assistant, Upper Colorado River Basin Salinity Control Project, Department of Agricultural and Chemical Engineering, Colorado State University (1975–1976]. Installed and evaluated trickle irrigation systems and irrigation system effects on salinity transport to irrigation return flow drainage waters.
• Other relevant experience includes consulting, expert witness, earth moving construction, agricultural equipment assembly, repair, and farming background.

• American Society of Agricultural and Biological Engineers (Chaired the Soil and Water Division and Hancor Soil and Water Engineering Awards committee. Served on the Meetings Council and other Soil and Water Division Drainage Group committees)
• Soil and Water Conservation Society (Served as vice-president to NY's Empire Chapter and chaired Ag. Waste and Drainage Committee)
• Land Improvement Contractors of America (Honorary Life Member)
• Epsilon Sigma Phi (Extension honorary society and served on Education Grants Committee)
• Alpha Epsilon (Honorary agricultural engineering student society)
• Cornell Cooperative Extension Integrated Nutrient Management and Crop and Soil Management Program Work Teams
• New York State Wetlands Forum, Inc. (Co-Founder and served on Board of Directors)

Honors and Awards

• Soil and Water Division Leadership Citation Award, American Society of Agricultural and Biological Engineers (2004)
• ASAE Blue Ribbon Award for outstanding publication, American Society of Agricultural Engineers (1998)
• Certificate of Appreciation Award for outstanding dedication and commitment, New York State Wetlands Forum, Inc. (1995)
• Certificate of Appreciation Award for team participant in design and implementation of Comprehensive Agricultural Monitoring and Evaluation Network, Lake Champlain Basin NY/VT Strategic Core Group (1993)
• Outstanding New Extension Publication Award, New York State Association of County Agricultural Agents (1991)
• Distinguished Service Award, New York Chapter Land Improvement Contractors of America (1988)
• Outstanding Service Award, New York Chapter Land Improvement Contractors of America (1984)

Recent Research and Extension Publications

• Czymmek, K.J., Q.M. Ketterings, and L.D. Geohring. 2005. How to calculate the NY Phosphorus Index. Agronomy Fact Sheet Series No. 10, Department of Crop and Soil Sciences, Cornell University, Ithaca, NY.
• Geohring, L.D., S. Lee, P.E. Wright, T.S. Steenhuis, and M.F. Walter. 2005. Drainage water quality response to liquid manure application. ASAE Paper # 05-2065, American Society of Agricultural Engineers, St. Joseph, MI. 13 pp.
• Geohring, L.D. 2005. Drainage considerations: Reducing risk during wet seasons. In: Empire State Fruit and Vegetable Expo and Produce Marketing Conference Proceedings, Syracuse, NY. pp. 61-63.
• Hyland, C.F., Q.M. Ketterings, D.R. Dewing, K. Stockin, K.J. Czymmek, G.L. Albrecht, and L.D. Geohring. 2005. Phosphorus basics – The phosphorus cycle, Agronomy Fact Sheet Series No. 12, Department of Crop and Soil Sciences, Cornell University, Ithaca, NY.
• Hyland, C.F., Q.M. Ketterings, L.D. Geohring, K. Stockin, D.R. Dewing, K.J. Czymmek, and G.L. Albrecht. 2005. Managing P runoff with the P Index. Agronomy Fact Sheet Series No. 13, Department of Crop and Soil Sciences, Cornell University, Ithaca, NY.
• Kim, Y.-J., L.D. Geohring, and T.S. Steenhuis. 2005. The fate of phosphorus from milkhouse waste discharged to a vegetative filter strip. ASAE Paper # 05-2177, American Society of Agricultural Engineers, St. Joseph, MI. 13 pp.
• Van Es, H.M., C.L. Yang, and L.D. Geohring. 2005. Maize nitrogen response as affected by soil type and drainage variability. Precision Agriculture, 6:281-295.
• Wright, P.E., L.D. Geohring and S.F. Inglis. 2005. Effectiveness of low flow collection of silage leachate and vegetative filter areas for CAFO farms. Final project report for EPA sponsor agreement X-982586-00, Biological and Environmental Engineering Department, Cornell University, Ithaca, NY. 36 pp.
• Czymmek, K.J., H.M. van Es, and L.D. Geohring. 2004. Manure and groundwater: The case for protective measures and supporting guidelines. In: Proceedings of the Northeast Dairy Producers Conference, Liverpool, NY, March 10-12, pp. 263-269.
• Wright, P.E., S.F. Inglis, and L.D. Geohring. 2004. Effectiveness of silage leachate treatment with vegetative filter areas. ASAE Paper # 04-2178, American Society of Agricultural Engineers, St. Joseph, MI. 14 pp.
• Czymmek, K.J., Q.M. Ketterings, L.D. Geohring, and G.L. Albrecht. 2003. The New York phosphorus runoff index: User’s manual and documentation. CSS Extension publication E03-13. Crop and Soil Sciences Department, Cornell University, Ithaca, NY. 64 pp.
• Czymmek, K.J., Q.M. Ketterings, L.D. Geohring, and G.L. Albrecht. 2003. New release: New York phosphorus index: User's manual and documentation. What's Cropping Up? 13(4): 7.
• Dittrich, T.M., L.D. Geohring, M.T. Walter, and T.S. Steenhuis. 2003. Revisiting buffer strip design standards for removing dissolved and particulate phosphorus. In: Total Maximum Daily Load Environmental Regulations II, ASAE Publication 701P1503, American Society of Agricultural Engineers, St. Joseph, MI. pp. 527-534.
• Geohring, L.D. 2003. A tool detects runoff risk. Northeast Dairy Business, 5(10): 18-19.
• Geohring, L.D. 2003. Tile-drained fields challenge manure applications. Northeast Dairy Business, 5(10): 19.
• Kim, Y.-J., L.D. Geohring, and T.S. Steenhuis. 2003. Phosphorus removal in vegetative filter strips receiving milkhouse wastewater and barnyard runoff. ASAE Paper # 03-2075, American Society of Agricultural Engineers, St. Joseph, MI. 11 pp.
• Richards, B.K., N. Peranginangin, T.S. Steenhuis, and L.D. Geohring. 2003. The unintentional secret. Journal of Soil and Water Conservation, 59(5):104A-105A.
• Geohring, L.D., T.S. Steenhuis, M.T. Walter, M.F. Walter, Q.M. Ketterings, and K.J. Czymmek. 2002. Phosphorus risk assessment tools for New York State. ASAE Paper # 02-2071, American Society of Agricultural Engineers, St. Joseph, MI. 13 pp.
• Hill, C.M., J. Duxbury, L.D. Geohring, and T. Peck. 2002. Designing constructed wetlands to remove phosphorus from barnyard runoff: Seasonal variability in loads and treatment. In: U. Mander and P.D. Jenssen (Eds.), Constructed wetlands for wastewater treatment in cold climates. WIT Press, Southampton, UK.
• Czymmek, K.J., L.D. Geohring, and Q. Ketterings. 2001. Phosphorus and Agriculture VIII: The new phosphorus index for New York State. What’s Cropping Up?, 11(4):1-3.
• Czymmek, K.J., L.D. Geohring, and Q. Ketterings. 2001. What’s the risk of phosphorus runoff from your fields? Northeast Dairy Business, 3(8): 26-28.
• Geohring, L.D. O.V. McHugh, M.T. Walter, T.S. Steenhuis, M.S. Akthar, M.F. Walter. 2001. Phosphorus transport into subsurface drains by macropores after manure applications: Implications for best manure management practices. Soil Science, 166(12):896-909.
• Geohring, L.D. 2001. Keeping pathogens out of water. In: Dairy Manure Systems Equipment and Technology. NRAES-143. Natural Resource, Agriculture, and Engineering Service, 152 Riley Robb, Ithaca, NY. pp. 353-365.
• Sogbedji, J.M., H.M. van Es, J. L. Hutson, and L.D. Geohring. 2001. N rate and transport under variable cropping history and fertilizer rate on loamy sand and clay loam soils: II. Performance of LEACHMN using different calibration scenarios. Plant and Soil, 229:71-82.
• Geohring, L.D. 2001. Buried irrigation lines - do it to be trouble free. In: Mid-Atlantic Fruit and Vegetable Conference Proceedings, PA Vegetable Growers Assoc., Richfield, PA. Vol. II:6-7.
• Brooks, A.S., M.N. Rozenwald, L.D. Geohring, L.W. Lion, and T.S. Steenhuis. 2000. Phosphorus removal by wollastonite: A constructed wetland substrate. Ecological Engineering, 15:121-132.
• Bryant, R.B., W.S. Reid, P.J. A. Kleinman, A.N. Sharpley, K.J. Czymmek, B.C. Bellows, L.D. Geohring, T.S. Steenhuis, F.B. Gaffney, S. Bossard, D. Dewing, and W.D. Hively. 2000. Phosphorus and agriculture V: The New York P Index. What’s Cropping Up?, 10(3):4-5.
• Geohring, L.D., 2000. Reducing manure effects on tile drains. In: Drainage Contractor, AIS Communications Limited, Exeter, Ontario, Canada. Nov. pp. 24-26.
• Geohring, L.D. 2000. Road > A > Syst Water Quality Resource Handbook: A local roads assessment system and management practice guide for water quality protection. Final project report to NYS-DEC. Biological and Environmental Engineering Department, Cornell University, Ithaca, NY. 34 pp.
• Geohring, L.D. 2000. Scheduling: Practical tools for knowing when and how much water to supply. NYS Vegetable Conference Proceedings, NYS Vegetable Growers Assoc., Ithaca, NY. pp. 161-166.
• Geohring, L.D. 2000. Fertigation: Using the drip system to satisfy crop nutrient needs. NYS Vegetable Conference Proceedings, NYS Vegetable Growers Assoc., Ithaca, NY. pp. 167.
• Geohring, L.D., R. Ayalon, V.K. Mehta, A. Heilig, T.S. Steenhuis, J. Chen, A.S. Brooks, and M.N. Rozenwald. 2000. Reducing soluble phosphorus concentrations from wastewater discharge using wollastonite. NABEC Paper # 2025. NE Agricultural/Biological Engineering Conference, Ithaca, NY.
• Hill, C.M., J.M. Duxbury, L.D. Geohring, and T. Peck. 2000. Designing constructed wetlands to remove phosphorus from barnyard runoff: Seasonal variability in loads and treatment. Journal Environmental Science and Health, A35(8):1357-1375.
• Sogbedji, J.M., H.M. van Es, C.L. Yang, L.D. Geohring, and F.R. Magdoff. 2000. Nitrate leaching and N budget as affected by maize N fertilizer rate and soil type. Journal Environmental Quality, 29:1813-1820.
• Geohring, L.D., P.E. Wright, T.S. Steenhuis, and M.F. Walter. 1999. Fecal coliforms in tile drainage effluent. ASAE Paper No. 99-2203. American Society of Agricultural Engineers, St. Joseph, MI. 20 pp.
• Geohring, L.D., P.E. Wright, T.S. Steenhuis, and M.F. Walter. 1999. Subsurface drain water quality impacts from manure applications. NABEC Paper No. 9905, NE Agricultural/Biological Engineering Conference, Lancaster, PA. 18 pp.
• Geohring, L.D. 1999. Tile drains and nutrient management planning considerations. In: Nutrient Management Planning: Competitive Agriculture in Harmony with the Community. Ontario Soil and Crop Improvement Assoc., Guelph, Ontario, Canada. pp: 211-221.
• Geohring, L.D. 1999. Buried irrigation lines - Do it to be trouble free. NYS Vegetable Conference Proceedings, NYS Vegetable Growers Assoc., Ithaca, NY. pp. 115-117.
• Geohring, L.D., T.S. Steenhuis, A.S. Brooks, M.N. Rosenwald, J. Chen, and V.J. Putman. 1999. Cost-Effective phosphorous removal from secondary wastewater effluent through mineral adsorption. Final Report for EPA grant X 001840-01 through Lake Champlain Special Designation Act (P.L. 101-596). 52 pp.
• Geohring, L.D., P.E. Wright, and T.S. Steenhuis. 1998. Preferential flow of liquid manure to subsurface drains. In: Brown, L.C. (Ed.), Drainage in the 21st Century: Food Production and the Environment, American Society of Agricultural Engineers, St. Joseph, MI. pp.1-8.
• Geohring, L.D., P.E. Wright, and T.S. Steenhuis. 1998. Preferential flow of liquid manure to subsurface drains. In: Manure Management in Harmony with the Environment and Society, Soil and Water Conservation Society, Ames, IA. pp. 392-395.
• Scott, C.A., L.D. Geohring, and M.F. Walter. 1998. Water quality impacts of tile drains in shallow, sloping, structured soils as affected by manure application. Applied Engineering in Agriculture Journal, 14(6):599-603.
• Steenhuis, T.S., R. Wells, L.D. Geohring, R. Wallach, and K.-J.S. Kung. 1998. Predicting fast transport of agri-chemicals in agricultural tile lines in heterogeneous field soils. In: Brown, L.C. (Ed.), Drainage in the 21st Century: Food Production and the Environment, American Society of Agricultural Engineers, St. Joseph, MI. pp. 544-550.
• Dougherty, M., L.D. Geohring, and P.E. Wright. 1998. Liquid manure application systems design manual. NRAES-89. Northeast Regional Agricultural Engineering Service, Ithaca, NY. 165 pp.

Recent Conference/Workshop Presentations and Posters

• Giri, S.K., B.K. Richards, L.D. Geohring, M. Todd Walter, and T.S. Steenhuis. 2005. Phosphorus removal from milkhouse wastewater with coal fly ash amendments in vegetative filter strips. Poster No. H21B-1291, American Geophysical Union Fall Meeting, Dec. 5-9, 2005, San Francisco, CA.
• Geohring, L.D., 2005. Basic CCA training presentations on “Soil hydrology and drainage and irrigation principles” and “Soils, watersheds, and pollutant fate and transport”, Certified Crop Advisor and Comprehensive Nutrient Management Planner Conference, Nov. 30, 2005, Waterloo, NY.
• Geohring, L.D. 2005, Presentation on “Nitrate leaching and groundwater”. Cornell Cooperative Extension Agriculture and Food Systems Inservice Education week, Nov. 4, Ithaca, NY.
• Geohring, L.D., 2005. Presentations on “Cornell University drainage research” and “Preferential flow influences on tile drain water quality”. NCR-207: Drainage Design and Management Practices to Improve Water Quality 2nd Annual Meeting, Aug. 15-17, Minneapolis, MN.
• Geohring, L.D., 2005. Presentations on “Manure applications and tile drain water quality” and “Linking variable source area hydrology with the NY Phosphorus Index”, Soil and Water Conservation Society Annual Conference, Aug. 1-4, Rochester, NY.
• Flores-Lopez, F., L.D. Geohring, S.K. Giri, and T.S. Steenhuis. 2005. Phosphorus transport by monitoring groundwater and interflow discharge in hydrologically sensitive areas. Poster No. EGU05-A-10153, European Geophysical Union General Assembly, April 24-29, 2005, Vienna, Austria.
• Geohring, L.D. 2005. Presentation on “Evaluating vegetative filters for wastewater treatment”. New York State Conservation Districts Employees Assoc. Water Quality Conference, March 21-24, Rochester, NY.
• Tan, I.Y.S., H.M. van Es, J.M. Duxbury, J.J. Melkonian, L.D. Geohring, R.R. Schindelbeck, and D. Hively. 2005. Nitrous oxide losses are increased under no-tillage and early fertilization. Presentation abstract for USDA Greenhouse Gas Symposium, March 21-24, 2005, Baltimore, MD.
• Geohring, L.D. 2005. Presentation on “Vegetative Filters for Wastewater Treatment”. New York Nonpoint Source Coordinating Committee Meeting, March 3, Ithaca, NY.
  
  Walter, M.T., L.D. Geohring, B.K. Richards, M.F. Walter, T.S. Steenhuis, P. Gerard-Merchant, L. Agnew, V. Collins, S. Lyon, and J. Walker. 2005. Hydrologically sensitive areas: Developing education and extension resources. Poster presented at the USDA-CSREES National Water Quality Conference, Feb. 6-10, La Jolla, CA.
• Geohring, L.D. 2005. Presentation on “Drainage: The good, the bad, and the ugly”. Land Improvement Contractors of America New York Chapter Annual Convention, Jan. 13, Syracuse, NY.
• Geohring, L.D. 2004. Presentation on “Concerns about nitrates in groundwater”. Northeast Dairy Producers Association Board of Directors Meeting, Dec. 12, Auburn, NY.