Keywords

  • drainage
  • hydrology
  • irrigation
  • soil and water
  • water management
  • water quality

Geohring, Larry Duane

Senior Extension Associate
My applied research, extension, and teaching efforts focus on two broad missions of CALS: 1) competitive agricultural systems and 2) greater harmony between agriculture and the environment. More specifically, my program emphasis addresses water quantity and quality issues in agriculture and the transport and fate of nutrients in the landscape.

research

research and scholarship focus

My research focuses on environmental impacts of land management practices, and evaluating techniques to reduce the impacts.

research areas

affiliations

academic staff in

teaching

teaching focus

Environmental monitoring and characterization of water and soil resources, and how to apply principles of engineering and soil physics to address land improvement and soil and water management practices.

service

outreach focus

My extension activity consists of conducting applied field-based research with cooperating entities, providing technical information resources and guidance regarding water and soil management practices, and carrying out various educational training activities. The applied research is carried out on Cornell University farms or done at other locations selected in cooperation with state and local government to investigate specific concepts or problems. The visibility of the applied research often leads to further requests for technical information, either directly or via referrals, and technical support is provided to county, regional, state, and campus personnel. Educational training is generally coordinated with Soil and Water Conservation Districts, USDA-NRCS, non-profit organizations and/or Extension organized training events and meetings.

current professional activities

  • Senior Extension Associate, Soil and Water Resources Engineering and Management, Cornell University (1990–Present)
  • Research/Extension Associate, Water Management Specialist in Drainage and Irrigation, Cornell University (1977–1990)
  • Graduate Research/Teaching Assistant, Soils Department, North Dakota State University (1976–1977)
  • Graduate Research/Teaching Assistant, Soils Department, North Dakota State University (1976–1977)
  • Research Technician/Graduate Research Assistant, Upper Colorado River Basin Salinity Control Project, Department of Agricultural and Chemical Engineering, Colorado State University (1975–1976)

background

educational background

  • M.S., (Agricultural Engineering), Colorado State University, 1976
  • B.S., (Agricultural Engineering), North Dakota State University, 1975

awards and distinctions

  • 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)

publications

selected publications (listing in progress)

  • 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.
Keywords: drainage, hydrology, irrigation, soil and water, water management, water quality