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Geohring, Larry Duane
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Positions
- Extension Associate Sr, Biological and Environmental Engineering (BEE), College of Agriculture and Life Sciences (CALS)
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 Areas
- agricultural engineering
- biological and environmental engineering
- environmental sciences
- hydrology
- water resource management
- watershed science
- Extension
- Research
- Publications
- Teaching
- Service
- Background
- Other
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Extension
Research
research overview
- My research focuses on environmental impacts of land management practices, and evaluating techniques to reduce the impacts.
research activities
principal investigator on
co-principal investigator on
keywords
- drainage
- hydrology
- irrigation
- water management
- water quality
Publications
individual publications
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academic article
- Factors Affecting Dissolved Phosphorus and Nitrate Concentrations in Ground and Surface Water for a Valley Dairy Farm in the Northeastern United States. Water Enviroment Research. 83:116-127. 2011
- Nutrient transport within three vegetative treatment areas receiving silage bunker runoff. Journal of Enviromental Management. 92:587-595. 2011
- Tracer movement through paired vegetative treatment areas receiving silage bunker runoff. Journal of Soil and Water Conservation. 66:18-28. 2011
- Colloid transport and retention in unsaturated porous media: Effect of colloid input concentration. Environmental Science & Technology. 44:4695-4972. 2010
- Design and risk assessment tool for vegetative treatment areas receiving agricultural wastewater: Preliminary results. Journal of Environmental Management. 91:1794-1801. 2010
- Effect of soil reduction on phosphorus sorption of an organic-rich silt loam. Soil Science Society of America Journal. 74:240-249. 2010
- Evaluation of two Langmuir models for phosphorus sorption of P-enriched soils in New York for environmental applications. Soil Science Journal. 174:523-530. 2009
- Phosphorus Sorption and Desorption Properties of Surface and Subsurface Horizons at Three Vegetative Treatment Areas in New York. ASABE. #09-7002:19. 2009
- Short-term nitrous oxide losses under maize production as affected by soil type, tillage, rotation, and fertilization. Soil and Tillage Research. 102:19-26. 2009
- Single-event nitrous oxide losses under maize production as affected by soil type, tillage, rotation, and fertilization. Soil and Tillage Research. 102:19-26. 2009
- Evaluation of the effectiveness of vegetative filter strips for phosphorus removal with the use of a tracer. Journal of Soil and Water Conservation. 61:293-302. 2006
- Weir design and calibration for stream monitoring in a riparian wetland. Hydrological Science and Technology Journal. 24:213-223. 2006
- Maize nitrogen response as affected by drainage variability and soil type. Precision Agriculture. 6:281-295. 2005
- A tool detects runoff risk. Northeast Dairy Business. 5:18-19. 2003
- The unintentional secret. Journal of Soil and Water Conservation. 59. 2003
- Tile-drained fields challenge manure applications. Northeast Dairy Business. 5:19. 2003
- 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. 2001
- Phosphorus Transport into Subsurface Drains by Macropores after Manure Applications: Implications for Best Manure Management Practices. Soil Science Journal. 12:896-909. 2001
- Phosphorus transport into subsurface drains by macropores after manure applications: Implications for best manure management practices. Soil Science Journal. 166:896-909. 2001
- Designing constructed wetlands to remove phosphorus from barnyard runoff: Seasonal variability in loads and treatment. Journal Environmental Science and Health. A35:1357-1375. 2000
- Nitrate leaching and N budget as affected by maize N fertilizer rate and soil type. Journal of Environmental Quality. 29:1813-1820. 2000
- Phosphorus removal by wollastonite: A constructed wetland substrate. Ecological Engineering. 15:121-132. 2000
- Water quality impacts of tile drains in shallow, sloping structured soils as affected by manure applications. Applied Engineering in Agriculture. 14:599-603. 1998
- A simple model for predicting solute concentration in agricultural tile lines shortly after application. EGS Hydrology and Earth System Sciences. 4:823-833. 1997
- Atrazine Fate on a Tile Drained Field in Northern New York: A Case Study. Agricultural Water Management. 31:195-203. 1996
- Subsurface Drainage Water Quality from a Structured Soil. ASCE: Journal of Irrigation and Drainage Engineering. 121:239-247. 1995
- Alfalfa yield and quality are affected by soil hydrologic conditions. Agronomy Journal. 86:535-542. 1994
- Hydrology and the Environment. New York's Food & Life Sciences Quarterly. 20:15-19. 1991
- Fast flow of chemicals in the vadose zone. Trans. of the American Geophysical Union. 71:1307. 1990
- Preferential Movement of Pesticides and Tracers in Agricultural Soils. ASCE J. Irrig. Drain. Engr.. 116:50-66. 1990
- Preferential Flow Influences on Drainage of Shallow Sloping Soils. Agricultural Water Management. 14:137-151. 1988
- Land drainage in Northern New York. New York Food and Life Science. 15:14-19. 1985
- Corrugated plastic drain tubing stretch during drain plow installation. Trans. of ASAE. 25:88-92. 1982
- Research indicates power feeders reduce stretch. Drainage Contractor. 6:63. 1980
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article
- NY Phosphorus Index may not be perfect, but has served state well. Chesapeake Media Service. 20. 2010
- Don’t ignore drainage tiles 2007
- Supplemental manure spreading guidelines to reduce water contamination risk during adverse weather conditions 2005
- Supplemental manure spreading guidelines to reduce water contamination risk during adverse weather conditions 2005
- New release: New York phosphorus index: user’s manual and documentation 2003
- The New York Phosphorus Runoff Index. User's Manual and Documentation. . 2003
- Phosphorus and Agriculture VIII: The New Phosphorus Index for New York State 2001
- What’s the risk of phosphorus runoff from your fields? 2001
- Phosphorus and Agriculture V: The New York P Index. What’s Cropping Up? 2000
- Is the pre-sidedress nitrate test affected by soil water conditions? 1996
- Components of the drip system: An overview 1995
- Moderate over fertilization increases groundwater nitrate levels 1995
- Can corn be grown without nitrate contamination of groundwater? 1994
- Drain spacing and profit potential 1994
- Drainage improvement decisions can influence profits 1993
- Rapid movement of manure to tile drainage lines: Should we be concerned? 1993
- Comparison of Drainage Practices for Alfalfa Production on Clay Loam Soils 1992
- Comparison of drainage practices for alfalfa production on clay loam soils 1992
- Drainage improves forage yield and quality 1986
- Subsurface drainage lowers watertable 1983
- Drainage planning pays off 1982
- Agricultural water management program newsletter 1981
- Drainage: An energy conservation measure 1980
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booksection
- Designing constructed wetlands to remove phosphorus from barnyard runoff: Seasonal variability in loads and treatment 2002
- Reducing manure effects on tile drains 2000
- Tile drains and nutrient management planning considerations 1999
- Predicting fast transport of agri-chemicals in agricultural tile lines in heterogeneous field soils 1998
- Preferential flow of liquid manure to subsurface drains 1998
- Soil water and forage response to controlled drainage 1995
- Specialized substrates for phosphorus removal with constructed wetlands 1995
- Drainage and soil compaction improvements to the U.S. Military Academy parade field 1992
- Optimizing economic returns in drainage design 1992
- Solute concentration prediction in agricultural drainage lines under a structured soil 1992
- Water Management 1992
- Movement of surface-applied and soil-embodied chemicals to drainage lines in a well structured soil 1991
- Crop response to different drainage intensity 1987
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conference paper
- Concentration dependence of colloid transport and retention in unsaturated porous media. American Society for Agricultural and Biological Engineers. 2010
- Hydrological evaluation and design of vegetative treatment areas. American Water Resources Association 2010 Annual Water Resources Conference. 2010
- Procedure for evaluating undesigned manure transfer systems in New York State. American Society for Agricultural and Biological Engineers. 2010
- Subsurface drainage discharges following manure appilcation: Measurements and model analyses. Proceedings XVIIth World Congress of the International Commission of Agricultural and Biosystems Engineering and 9th International Drainage Symposium, Quebec City, Canada. 2010
- The role of curli and cellulose in the transport and survival of Escherichia coli on a central New York dairy farm. Canadian Society for Bioengineering’s XVIIth World Congress of the International Commission of Agricultural and Biosystems Engineering and 9th International Drainage Symposium. 2010
- Evaluation of two Langmuir models for phosphorus sorption on various soils under various conditions. ASABE Paper # 08-4181. 14. 2008
- Investigating event nitrate dynamics in paired vegetative treatment areas receiving silage bunker runoff using a simple mixing approach. ASABE Paper # 08-3915. 25. 2008
- Irrigation Systems for Tree Fruit. Empire State Fruit and Vegetable Expo Conference Proceedings. 154-156. 2008
- Phosphorus sorption characteristics of soils from vegetative filter areas receiving dairy farm wastewaters. ASABE Annual International Meeting, Rhode Island. 2008
- Nitrogen and dairy farms. Proc. Northeast Dairy Producers Conference. 167-169. 2006
- Manure and Groundwater: The case for protective measures and supporting guidelines. Northeast Dairy Producers Conference Proceedings. 2004
- Customizing and validating the P Index in whole farm plans for soils of the Northeast. USDA National Water Quality Coordinators Conference: Building the Network, Strengthening Partnerships. 2003
- Preferential flow in soils: Developing extension and education resources. USDA National Water Quality Coordinators Conference: Building the Network, Strengthening Partnerships. 2003
- Revisiting buffer strip design standards for removing dissolved and particulate phosphorus. Total Maximum Daily Load Environmental Regulations II Conference Proceedings, Nov. 8-12, 2003, Albuquerque, NM. 527-534. 2003
- The effect of preferential flow paths to phosphorus removal of vegetative filter strips in NYC’s source watersheds. Am. Water Resour. Assoc. Int. Congress: Watershed Management for Water Supply Systems. 2003
- Phosphorus Index: A risk assessment tool to help evaluate farm field management and promote surface water quality. NEDPA Conference Proceedings. 2002
- Phosphorus risk assessment tools for New York State. ASAE-CIGR Paper 0022071, ASAE Annual International Meeting / CIGR XVth World Congress, July 28-31, Chicago, IL. 2002
- Buried irrigation lines - do it to be trouble free. Mid-Atlantic Fruit and Vegetable Conference Proceedings, PA Vegetable Growers Assoc.. 6-7. 2001
- Keeping pathogens out of water. Dairy Manure Systems Equipment and Technology. 353-365. 2001
- Fertigation: Using the drip system to satisfy crop nutrient needs. NYS Vegetable Conference Proceedings. 167. 2000
- Scheduling: Practical tools for knowing when and how much water to supply. NYS Vegetable Conference Proceedings. 161-166. 2000
- Buried irrigation lines - Do it to be trouble free. NYS Vegetable Conference Proceedings. 115-117. 1999
- A case study of atrazine and nutrient concentration changes through a stream and wetland prior to reaching Lake Champlain. Wetlands and Water Resources (Watershed) Mgmt. Workshop. 1998
- Preferential flow of liquid manure to subsurface drains. Manure Management in Harmony with the Environment and Society. 392-395. 1998
- Management and site considerations for reducing environmental impacts of subsurface drainage effluents. ASAE Paper 96-2122. 1996
- Phosphorus removal with constructed wetlands. Constructed Wetlands in Cold Climates Symposium. 1996
- Trickle systems: Basic components, design and installation considerations. NYS Vegetable Conference Proceedings. 1996
- Water quality in head water catchment as affected by preferential flow and agricultural tile lines. AGU Fall Meeting. 1996
- Soil hydrology and liquid manure applications. Liquid manure application systems: Design, Management, and Environmental Assessment. 166-174. 1994
- Subsurface flow and transport after solute application in a structured soil. EGS XVIII General Assembly. 1993
- Agricultural tile lines for sampling tillage practices in soils with preferential flow paths. EGS XVII General Assembly. 1992
- Solute flow to tile lines under different tillage management practices in soils with preferential flow paths. Agric. Water Quality Priorities, USDA-ARS Symp. XVII. 1992
- Importance of preferential flow as a mechanism for solute loss in agricultural tile lines. Proceedings of the Symposium on Land Drainage for Salinity Control in Arid and Semi-Arid Regions. 163-174. 1990
- Management of Glacio-Lacustrine soils in Northern New York. Proceedings 2nd Seminar on International Cooperation of Agricultural Technology in Developing Countries. 189-204. 1990
- Pesticide movement under no-till and conventional tilled corn. 52nd Annual New York State Pesticide Management Conference. 1990
- Preferential flow paths in structured soils. 52nd Annual New York State Pesticide Management Conference. 1990
- Solute movement to subsurface drainage lines in Kingsbury sandy clay loam. Soil, Crop and Atmospheric Science SCAS 90-9. 1990
- Irrigation system options: Pros and cons. Proceedings of New York State Vegetable Conference, NYS Vegetable Growers Assoc.. 27-28. 1989
- Simulation of effect of drainage on surface flow and moisture content for soils underlain by a hardpan. Paper I-1-9, Ninth International Congress of the Commission Internationale de Genie Rural. 1979
- Optimizing trickle irrigation system design. Proceedings of the 7th International Agricultural Plastics Congress. 103-116. 1977
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conference poster
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document part
- Mitigating Manure Contaminated Drain Discharge with Controlled Drainage 2012
- Phosphorus removal from milkhouse wastewater and barnyard runoff with coal fly ash amendments in vegetative filter strips: initial tests 2005
- Partition preferential flow by sequentially applying conservative tracers 1998
- Phosphorus removal from municipal wastewater using wollastonite tailings in constructed wetlands 1998
- Abstracts of presentations for Wetlands '95 - Sharing information and planning the future 1995
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intellectual contribution
- Identifying and Addressing Hydrologically Sensitive Areas for Developing Comprehensive Nutrient Management Plans 2008
- Reducing soluble phosphorus concentrations from wastewater discharge using wollastonite 2000
- Cost-effective phosphorous removal from secondary wastewater effluent through mineral adsorption 1999
- Options for organizing for drainage for New York landowners 1978
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manual
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report
- Subsurface (Tile) Drainage Benefits and Installation Guidance 2011
- Subsurface (Tile) Drainage Best Management Practices 2011
- Evaluating vegetated filter areas for treating agricultural wastewaters 2007
- An evaluation of the New York NRCS pathogen management interim standard 2005
- Drainage Water Quality Response to Liquid Manure Application 2005
- Drainage water quality response to liquid manure application 2005
- Effectiveness of low flow collection of silage leachate and vegetative filter areas for CAFO farms 2005
- How Manure Application Timing, Crop, and Soil Type Affect Phosphorus Leaching 2005
- How to calculate the NY Phosphorus Index 2005
- Managing P runoff with the P Index 2005
- Manure impacts on water quality: Evaluating cost effective management strategies for reducing soluble phosphorus loss in the Northeastern US 2005
- Phosphorus basics – The phosphorus cycle 2005
- The fate of phosphorus from milkhouse waste discharged to a vegetative filter strip 2005
- Effectiveness of silage leachate treatment with vegetative filter areas 2004
- Phosphorus removal in vegetative filter strips receiving milkhouse wastewater and barnyard runoff 2003
- Phosphorus risk assessment tools for New York State 2002
- 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 2000
- Fecal coliforms in tile drainage effluent 1999
- Subsurface Drain Water Quality Impacts from Manure Applications 1999
- Subsurface drain water quality impacts from manure applications 1999
- Liquid manure application systems design manual 1998
- A Simple Model for Predicting Solute Concentration in Agricultural Tile Lines Shortly After Application 1997
- Groundwater nitrate levels and N management 1996
- Irrigation and chemigation equipment 1996
- Wollastonite and constructed wetlands 1996
- Controlling environmental impact in tile drained fields 1994
- Best management practices for pesticides in New York. 1993
- Drip irrigation/fertigation of peppers for improved efficiency of nitrogen fertilizer and water use 1991
- Fast flow of chemicals in the vadose zone 1990
- Macropores effects on solute transport through field soils 1990
- Preferential flow and solute loss in agricultural tile lines 1990
- Water management 1990
- Controlled drainage and subirrigation of sloping fragipan soil 1989
- Summary report of drainage and soil modification improvements to the parade grounds at the United States Military Academy, West Point, New York 1989
- SPRINKLE - A computer program to design sprinkler irrigation systems for vegetable crop production 1988
- Subsurface irrigation through a system for optimal water management and crop production 1988
- Common problems which cause subsurface drainage systems to fail 1986
- Effects of preferential flow on drainage of shallow sloping soils 1986
- Forage yield and species response to drainage 1985
- Partial list of companies providing irrigation equipment and/or design services to New York growers 1985
- Corn and forage response to different drainage treatments 1983
- Corn yield response to conventional and conservation tillage practices on poorly drained soils 1983
- Hydraulic conductivity measurements of selected soils in Northern New York 1983
- Summary of New York State drainage law 1983
- Transient reverse auger hole measurement of conductivity 1983
- Summary of agricultural water management program accomplishments – 1976 through 1982 1982
- Drainage Research Miner Institute - 1980 soil and crop responses 1981
- Pump outlets for subsurface drainage on mineral soils 1981
- Soil and crop response to different drainage treatments in northern New York 1981
- Drainage research Miner Institute - 1978 soil and crop responses 1980
- Drainage research Miner Institute - 1979 soil and crop responses 1980
- Subsurface drainage design criteria – Considerations for the Northeast 1980
- Drain plow potential for use in New York 1979
- Drainage design guide for New York Land Improvement Contractors 1979
- Facts about corrugated plastic drainage tubing 1979
- Simulation of effect of drainage on surface flow and moisture content for soils underlain by a hardpan 1979
- Institutional arrangements for drainage outlet development in New York 1978
- Bell-Six Mile Creek subwatershed drainage and flooding investigation report 1977
- Evapotranspiration potential under trickle irrigation 1976
Teaching
teaching overview
- 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.
teaching activities
- BEE-4740: Water and Landscape Engineering Applications - Spring 2013
- BEE-6970: Graduate Individual Study in Biological and Environmental Engineering - Spring 2013
- BEE-4270: Water Measurement and Analysis Methods - Fall 2012
- BEE-6970: Graduate Individual Study in Biological and Environmental Engineering - Fall 2012
- BEE-4740: Water and Landscape Engineering Applications - Spring 2012
- BEE-6970: Graduate Individual Study in Biological and Environmental Engineering - Spring 2012
- BEE-4270: Water Measurement and Analysis Methods - Fall 2011
- BEE-6970: Graduate Individual Study in Biological and Environmental Engineering - Fall 2011
Service
outreach overview
- 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.
service to the profession
reviewer or editor for
Background
education and training
- M.S. in Agricultural/Environmental Engineering, Colorado State University 1976
- B.S. in Agricultural Engineering, North Dakota State University 1975
awards and honors
- Partnership Award for Mission Integration (to BEE Soil & Water Group), 2008
- Commendation Award, 2006
- Leadership Citation, 2004
- Blue Ribbon Award, outstanding publication, 1998
- Certificate of Appreciation Award, dedication & commitment, 1995
- Certificate of Appreciation Award, team participant, 1993
- Outstanding New Extension Publication Award, 1991
- Distinguished Service Award, 1988
Other
college
- CALS
research keyword
- drainage
- hydrology
- irrigation
- water management
- water quality