Ars 13 3301

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Chapter 33 - GAMBLING (§§ 13-3301 — 13-3312) Chapter 34 - DRUG OFFENSES (§§ 13-3401 — 13-3423) Chapter 34.1 - IMITATION SUBSTANCE OR DRUG OFFENSES (§§ 13-3451 — 13-3461). Arizona Revised Statutes Title 13. Criminal Code § 13-3301.

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  2. Ars 13 3402
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Education

  • Ph.D., 1985: Soil Physics, Mississippi State Univ., Miss. State.
  • M.S., 1981: Agronomy, Pennsylvania State Univ., Univ. Park.
  • M.E.P.C., 1979: Environmental Pollution Control, Pennsylvania State Univ., Univ. Park.
  • B.S., 1976: Environmental Resource Management, Pennsylvania State Univ., Univ. Park.

Major Subjects Studied

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In undergraduate work: Environmental Resource Mgmt.
In graduate work: Soil Physics, Environmental Pollution Control

Minor Subjects Studied

In undergraduate work: Engineering, Biology, Chemistry
In graduate work: Engineering, Hydrology, Mathematics, Statistics

Foreign Languages

French

Experience

Professional

  • USDA-ARS; Northwest Irrigation and Soils Research Lab., 3793 N. 3600 E., Kimberly, ID 83341. Oct., 1987 - present; GS-11 to GS-13
    • Research on soil aggregate stability, soil erodibility, nitrate contamination of groundwater, and infiltration under sprinkler and furrow irrigation
    • Soil Scientist responsible for project leadership and employee supervision
  • USDA-ARS; GS-11; National Sedimentation Lab., P.O. Box 1157, Oxford, MS (Sept., 1986 - Sept., 1987)
    • Research on soil interrill erodibility, Developing a data base of erosion rates and sediment properties
    • Soil Scientist (post-doctoral appointment) with leadership responsibilities of independently conceiving, conducting, and reporting research
  • Mississippi State Univ., Mississippi State (Sept., 1980 - Aug., 1986)
    • Research in soil physics, Overseeing field research, Supervising employees, Analyzing and interpreting the results of field studies
    • Research Associate with significant responsibility
  • Pennsylvania State Univ., University Park (Mar., 1980 - Aug., 1980)
    • Research in soil fertility, Designing a field experiment, Applying fertilizer, Collecting plant and soil samples
    • Graduate Research Assistant (3/4 time) with major responsibility and limited supervision

Studied processes responsible for soil aggregate formation and stabilization; monitored changes in aggregate stability occurring with time and as a consequence of climatic differences, freeze-thaw cycles, water droplet kinetic energy, and tillage; developed techniques to minimize nitrate leaching through soil profiles while maximizing plant uptake of NO3-N; measured soil surface roughness and other soil physical properties as affected by rainfall, cultivation, and soybean canopy development; operated a hydraulically driven soil sampler, hand-operated recording-type soil penetrometer, Meyer and Harmon oscillating nozzle-type rainfall simulator, and an automated, non-contact microrelief meter; evaluated the effects of planting date, winter wheat presence, soybean row spacing, crop rotations, and tillage on plant extractable water in wheat-soybean double-cropping systems; developed a procedure to estimate plant extractable water in soil profiles; developed models to predict infiltration into reclaimed fly ash disposal areas; determined a soil erodibility factor for fly ash; studied techniques successfully used for coal ash stabilization; measured erosion from rainfall; determined single-storm rainfall factors; applied soil water balance theories to estimate infiltration into and percolation through a fly ash disposal area; measured NO3-N movement through a soil profile.

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Teaching

USDA

  • USDA-ARS Northwest Irrigation and Soils Research Lab. Staff, 1990, Statistical Analyses using SAS

Undergraduate Teaching

  • College of Southern Idaho, 1990-1996, Introduction to Computers, DOS (Beginning and Advanced)
  • College of Southern Idaho, 1991, Introduction to Statistics

Of Individuals

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  • USDA-ARS, Kimberly, ID, 1988-present, Soil Physics Laboratory Techniques and Field Research Procedures
  • USDA-ARS, Oxford, MS, 1987, Soil Physical and Chemical Laboratory Analysis Procedures
  • Mississippi State University, 1981-1986, Statistical Analyses, Personal Computer Operations, Soil Physics Laboratory Techniques, Field Research Procedures

Membership in Honor Societies and in Professional Organizations

  • Gamma Sigma Delta
  • Sigma Xi
  • American Society of Agronomy
  • Soil Science Society of America
  • Soil and Water Conservation Society
  • Western Society of Soil Science

Membership in Other Organizations

  • Graduate Faculty
    • University of Idaho, Affiliate Professor of Soil Science, Department of Plant, Soil and Entomological Sciences, 1988-present
  • Other
    • College of Southern Idaho (Instructor, Main Campus, Twin Falls, ID, 1990-1996; Instructor, Mini-Cassia Campus, Burley, ID, 1991)
    • Microcomputer User's Group, Mississippi State University, 1985-1987.
    • Mississippi Chapter, Soil and Water Conservation Society, Member, 1987.
    • Pacific Northwest Frozen Soil Task Force, 1988-1990.

Honors and Awards:

  • Permitted as a junior in high school to attend Penn. State Univ. as an adjunct student while completing requirements for a diploma, 1971-1972;
  • Recipient of a certificate and cash award for placing second in the Am. Soc. Agron. Graduate Student Paper Competition, Southern Branch, 1985;
  • Elected to Gamma Sigma Delta Agricultural Honor Society, 1985;
  • Elected to Sigma Xi Scientific Research Honor Society, 1988;
  • Listed in Outstanding Young Men of America, 1989;
  • Listed in American Men and Women of Science, 17th ed., 1989-1990, and 19th ed., 1995-1996;
  • Listed in Who's Who in Science and Engineering, 1st ed., 1992-1993, 2nd ed., 1994-1995, and 3rd ed., 1996-1997;
  • Listed in Who's Who in the World, 12th ed., 1994-1995;
  • Listed in Men of Achievement, 16th ed., 1994-1995, and 17th ed., 1996-1997;
  • Honored as an Outstanding Technical Reviewer for the Soil and Water Division of the American Society of Agricultural Engineers, 1995.
  • Co-recipient of the 2005 Merit Award presented to the Northwest Irrigation and Soils Research Laboratory by the Soil and Water Conservation Society's Idaho Chapter, 2005.
  • Listed in Madison's Who's Who, 2008-2009.

Vita

Gary is a soil scientist, with specialized training and expertise in soil physics.

He conducts and publishes personal and team research. Gary serves as lead scientist for some research projects and as a collaborator on others. He reviews research papers and proposals and serves as an Associate Editor on the editorial board of the journal Arid Land Research and Management.

He earned a Bachelor's and two Master's degrees (one in Environmental Pollution Control and one in Agronomy) from Penn State University in the late 1970's and a Ph.D. in Soil Physics from Mississippi State University in 1985. Throughout the past 26 years, Gary has been employed by the U.S. Dept. of Agriculture at Kimberly as a soil scientist studying soil structure, water movement, and irrigation management.

Research

Current Interests

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In his current personal and team research, Gary seeks 1) to increase sugarbeet seedling emergence by minimizing soil crusting and improving soil physical and hydraulic properties, 2) to utilize agricultural by-products, such as whey, manure, and compost, and irrigation management to increase crop production efficiency and improve soil properties, and 3) to characterize and control preferential transport of nutrients, such as N & P, and other solutes through soil, thereby protecting groundwater quality. Historically, much of Gary's research has focused on the processes and products responsible for soil aggregate formation, stabilization, and destruction in cultivated irrigated soils.

Gary is now studying 1) N & P release from soil aggregates fractured by freezing and thawing processes, 2) soil organic carbon effects on soil physical & hydraulic properties, 3) runoff water quality from fields that have received compost and manure, and 4) water movement and chemical transport through surfactant-treated wettable and non-wettable soils. In a collaborative investigation with University of Idaho researchers, Gary is studying organic amendment effects on soil structure and N management.

Special Invitations

  • Invited to present the paper 'Estimating soil interrill erodibility' at the Water Erosion Prediction Project (WEPP) Core Team Meeting and Workshop, Columbia, MO. 1988.
  • Invited to present the paper 'Temporal variation in aggregate stability' at the Water Erosion Prediction Project (WEPP) Core Team Meeting and Workshop, Columbia, MO. 1988.
  • Invited to present the paper 'Temporal changes in wet aggregate stability' at the International Summer Meeting of the American Society of Agricultural Engineers, Albuquerque, NM. 1991.
  • Invited to present the paper 'Furrow erosion and aggregate stability changes in southern Idaho' at the National Irrigation-Induced Erosion and Water Quality Conference, Boise, ID. 1992.
  • Invited to present the paper 'Effects of soil strength on furrow erosion variation within two growing seasons' at the National Irrigation-Induced Erosion and Water Quality Conference, Boise, ID. 1992.
  • Invited to co-author the chapter 'Cheese whey as a soil conditioner' for the book 'Handbook of Soil Conditioners,' edited by Drs. A. Wallace and R. E. Terry, and published by Marcel Dekker, Inc. 1998.
  • Invited by Dr. Malcolm Sumner, Regents' Professor of Soil Science, Univ. of Georgia, to serve as a member of a nationwide Soil Science Delegation of the People to People Citizen Ambassador Program visit to the Republic of South Africa. 1996.
  • Invited to participate in a regional roundtable of Pennsylvania Governor Tom Ridge's 21st Century Environment Commission, with goals to identify 1) Pennsylvania's environmental priorities for the next century, and 2) means to achieve those goals. 1997.
  • Invited to present the paper 'Aggregate stability research at Kimberly, ID: Past, present, and future' to the faculty, staff, and students of the Department of Plants, Soils, and Biometeorology, Utah State Univ., Logan. 1998.
  • Invited by Dr. Jorge Delgado, Soil Scientist, ARS, Fort Collins, CO, to write the paper 'Furrow irrigation and N management strategies to protect water quality' for publication in a special issue of Communications in Soil Science and Plant Analysis and to present the findings in a special session at the Annual Conference of the Soil & Water Conservation Society, Biloxi, MS, 1999.
  • Invited by Mr. Michael J. Cook, Soil Scientist, Technical Services Division, State of Idaho Division of Environmental Quality, Boise, 1) to serve as a member of a research panel evaluating winter-time land application of potato processing wastewater, and 2) to review the hydraulic loading/nutrient balance module of Idaho DEQ's Wastewater Reuse System Modeling Tool used to guide the permitting of wastewater land application sites. 2000, 2013.
  • Invited by Dr. Lillian Oygarden, Soil Scientist, BIOFORSK - The Norwegian Institute for Agricultural and Environmental Research, ?s, Norway, to present a keynote lecture on 'Aggregate stability analysis for freezing environments' at the International Symposium on Snowmelt Erosion and Related Problems, Oslo, Norway, attended by more than 75 researchers from 23 countries in North America, Scandinavia, Europe, and Russia, 2001.
  • Invited to write the chapter 'Erosion: Irrigation-induced' for the 'Encyclopedia of Soils in the Environment,' edited by Dr. Daniel Hillel, and published by Elsevier Ltd., 2005. Subsequently invited by Mr. Es Collins, Senior Project Manager, Major Reference Works, Elsevier, to write a second chapter on the same topic as a reference module in an online database published by Elsevier, 2013.
  • Invited by Ms. Dee Carlson, Water Quality Specialist, USDA-NRCS, Boise, to present the paper 'Nitrate-N and bromide transport via preferential flow through a sprinkler-irrigated Portneuf silt loam' at the Soil and Water Conservation Society workshop entitled 'Water Quantity and Quality Issues in the Magic Valley,' held at Twin Falls, ID, 2005.
  • Invited to write the chapter 'Freezing and thawing processes' for the 'Encyclopedia of Soils in the Environment,' edited by Dr. Daniel Hillel, and published by Elsevier Ltd., 2005. Subsequently invited by Mr. Es Collins, Senior Project Manager, Major Reference Works, Elsevier, to write a second chapter on the same topic as a reference module in an online database published by Elsevier, 2013.
  • Invited by Mr. James M. Thomas, then Water Quality Specialist, Yakama Nation Indian Reservation, Toppenish, WA, to present a keynote lecture on 'Minimizing soil erosion and protecting water quality under furrow and sprinkler irrigation,' at the Sustainable Agriculture Workshop, Yakama Nation Indian Reservation, Toppenish, WA, 2006. Subsequently invited by Mr. Thomas to present a lecture on 'Enhancing soil productivity under sprinkler irrigation,' at the Sustaining Productive Soils Workshop, Yakama Nation Indian Reservation, Toppenish, WA, 2007.
  • Invited by Mr. Michael J. Cook, Soil Scientist, Technical Services Division, State of Idaho Division of Environmental Quality, Boise, to present a lecture on 'N release from plowed-down alfalfa as it affects the nitrogen balance on wastewater reuse sites,' at the 8th Annual Wastewater Reuse Meeting and Interstate Symposium, State of Idaho Division of Environmental Quality, Boise, ID, 2007. The symposium was attended by more than 25 regulatory personnel and researchers from a tri-state area of the Pacific Northwest, 2007.
  • Invited by Dr. Brad Brown, Ext. Soil and Crop Mgmt. Spec., Univ. of Idaho, Parma, to present the paper 'Nitrogen placement, row spacing, and water management for furrow-irrigated field corn,' at the Idaho Nutrient Management Conf., Jerome, ID. 2008.
  • Invited by Dr. Lubomir Lichner, Professor, Institute of Hydrology, Slovak Academy of Sciences, 1) to present surfactant research findings at the 2nd International Conference on Biohydrology, Bratislava, Slovakia, 21-24 September 2009, and 2) to prepare a paper on the topic for a journal's special issue. 2009.
  • Invited by Mr. Florin Talpes, President, Romanian National Council for Development and Innovation, to evaluate project proposals submitted to the Council's Partnership Programme for Joint Applied Research Projects, 2011.

Committee Assignments

  • Water Resources Committee, Mississippi Chapter, Soil and Water Conservation Society, Member, 1987.
  • Editorial Committee, Intl. Symp. on Frozen Soil Impacts on Agricultural, Range, and Forest Lands, Pacific Northwest Frozen Soil Task Force, Member, 1988-1990.
  • Editorial Committee, 10th Annual Natl. Meet. of Am. Soc. Surface Mining and Reclamation, held in Spokane, WA, 1992-1993.
  • Secretary/Treasurer, Vice-President, then President, Magic Valley Chapter of Sigma Xi Scientific Research Honor Society, 1991-1994.
  • Northwest Irrigation and Soils Res. Lab., Kimberly, ID:
    • Library Committee, Chair, 1990-2002.
    • Safety Committee, Member, 1990-2000, Chair 2001-2002.
    • Computer Equipment and Service Committee, Member, 1990-2002.

Publications

Article

  • Koehn, A. C. and Lehrsch, G. A. and Busscher, W. J. and Evans, D. E. and King, B. A. and Stieneke, D. L. and and Sojka, R. E. (2014) Aggregate tensile strength and friability characteristics of furrow and sprinkler irrigated fields in southern Idaho. Commun. Soil Sci. Plant Anal. (Accepted Jan. 29, 2014).
  • Lentz, R. D. and Lehrsch, G. A. (2014) Manure and fertilizer effects on organic and inorganic carbon losses and budget for an irrigated corn field. Soil Sci. Soc. Am. J. (Accepted Feb. 12, 2014).
  • Lehrsch, G. A. (2013) Surfactant effects on the water-stable aggregation of wettable soils from the continental U.S. Hydrological Processes 27:1739-1750.
  • Lehrsch, G. A. and Sojka, R. E. and Koehn, A. C. (2012) Surfactant effects on soil aggregate tensile strength. Geoderma 189-190:199-206.
  • Lentz, R. D. and Lehrsch, G. A. (2012) Net nitrogen mineralization from past years' manure and fertilizer applications. Soil Science Society of America Journal 76:1005-1015.
  • Lentz, R. D. and Lehrsch, G. A. (2012) Nitrogen availability and uptake by sugarbeet in years following a manure application. International Journal of Agronomy 2012: Article ID 120429 (12 pgs.) (doi: 10.1155/2012/120429).
  • Lentz, R. D. and Lehrsch, G. A. and Brown, B. and Johnson-Maynard, J. and Leytem, A. B. (2011) Dairy manure nitrogen availability in eroded and noneroded soil for sugarbeet followed by small grains. Agronomy Journal 103(3):628-643.
  • Lehrsch, G. A. and Sojka, R. E. (2011) Water quality and surfactant effects on the water repellency of a sandy soil. Journal of Hydrology 403(1&2):58-65.
  • Ippolito, J. A. and Tarkalson, D. D. and Lehrsch, G. A. (2011) Zeolite soil application method affects inorganic nitrogen, moisture, and corn growth. Soil Science 176(3):136-142.
  • Lehrsch, G. A. and Sojka, R. E. and Reed, J. L. and Henderson, R. A. and Kostka, S. J. (2011) Surfactant and irrigation effects on wettable soils: Runoff, erosion, and water retention responses. Hydrological Processes 25:766-777.
  • Lentz, R. D. and Lehrsch, G. A. (2010) Nutrients in runoff from a furrow-irrigated field after incorporating inorganic fertilizer or manure. Journal of Environmental Quality 39:1402-1415.
  • Lehrsch, G. A. and Kincaid, D. C. (2010) Sprinkler irrigation effects on infiltration and near-surface unsaturated hydraulic conductivity. Transactions of the ASABE 53(2):397-404.
  • Lehrsch, G. A. and Gallian, J. J. (2010) Oilseed Radish effects on soil structure and soil water relations. Journal of Sugar Beet Research 47(1 & 2):1-21.
  • Sojka, R.E. and Lehrsch, G.A. and Kostka, S.J. and Reed, J.L. and Koehn, A.C. and Foerster, J.A. (2009) Soil water measurements relevant to agronomic and environmental functions of chemically treated soil. Journal of the ASTM International 6(1):1-20.
  • Lehrsch, G.A. and Robbins, C.W. and Brown, M.J. (2008) Whey utilization in furrow irrigation: Effects on aggregate stability and erosion. Bioresource Technology 99(17):8458-8463.
  • Lehrsch, G.A. and Kincaid, D.C. (2007) Compost and manure effects on fertilized corn silage yield and nitrogen uptake under irrigation. Communications in Soil Science and Plant Analysis 38:2131-2147.
  • Lehrsch, G.A. and Kincaid, D.C. (2006) Sprinkler droplet energy effects on soil penetration resistance and aggregate stability and size distribution. Soil Science 171(6):435-447.
  • Lehrsch, G.A. and Lentz, R.D. and Kincaid, D.C. (2005) Polymer and sprinkler droplet energy effects on sugar beet emergence, soil penetration resistance, and aggregate stability. Plant and Soil 273:1-13.
  • Lehrsch, Gary A. and Sojka, R.E. and Westermann, D.T. (2001) Furrow irrigation and N management strategies to protect water quality. Communications in Soil Science and Plant Analysis 32(7&8):1029-1050.
  • Sojka, R.E. and Busscher, W.J. and Lehrsch, G.A. (2001) In situ strength, bulk density, and water content relationships of a Durinodic Xeric Haplocalcid soil. Soil Science 166(8):520-529.
  • Lehrsch, Gary A. and Sojka, R.E. and Westermann, D.T. (2000) Nitrogen placement, row spacing, and furrow irrigation water positioning effects on corn yield. Agronomy Journal 92:1266-1275.
  • Lehrsch, Gary A. (1998) Freeze-thaw cycles increase near-surface aggregate stability. Soil Science 163(1):63-70.
  • Lehrsch, G.A. and Robbins, C.W. (1996) Cheese whey effects on surface soil hydraulic properties. Soil Use and Management 12:205-208.
  • Lehrsch, G.A. and Brown, M.J. (1995) Furrow erosion and aggregate stability variation in a Portneuf silt loam. Soil Technology 7:327-341.
  • Brown, M.J. and Carter, D.L. and Lehrsch, G.A. and Sojka, R.E. (1995) Seasonal trends in furrow irrigation erosion in southern Idaho. Soil Technology 8:119-126.
  • Lehrsch, G.A. and Robbins, C.W. and Hansen, C.L. (1994) Cottage cheese (acid) whey effects on sodic soil aggregate stability. Arid Soil Research and Rehabilitation 8:19-31.
  • Lehrsch, G.A. and Whisler, F.D. and Buehring, N.W. (1994) Cropping system influences on extractable water for mono- and double-cropped soybean. Agricultural Water Management 26:13-25.
  • Robbins, C.W. and Lehrsch, G.A. (1992) Effects of acidic cottage cheese whey on chemical and physical properties of a sodic soil. Arid Soil Research and Rehabilitation 6:127-134.
  • Lehrsch, G.A. and Jolley, P.M. (1992) Temporal changes in wet aggregate stability. Transactions of the ASAE 35(2):493-498.
  • Lehrsch, G.A. and Sojka, R.E. and Carter, D.L. and Jolley, P.M. (1991) Freezing effects on aggregate stability affected by texture, mineralogy, and organic matter. Soil Science Society of America Journal 55:1401-1406.
  • Lehrsch, Gary A. and Baker, Dale E. (1989) Fly ash erodibility. Journal of Soil and Water Conservation 44(6):624-627.
  • Lehrsch, G.A. and Whisler, F.D. and R?mkens, M. J. M. (1988) Selection of a parameter describing soil surface roughness. Soil Science Society of America Journal 52:1439-1445.
  • Lehrsch, G.A. and Whisler, F.D. and R?mkens, M. J. M. (1988) Spatial variation of parameters describing soil surface roughness. Soil Science Society of America Journal 52(2):311-319.
  • Lehrsch, G.A. and Whisler, F.D. and R?mkens, M. J. M. (1987) Soil surface roughness as influenced by selected soil physical properties. Soil & Tillage Research 10:197-212.
Ars

Book Section

  • Lehrsch, G. A. and Lentz, R. D. and Bjorneberg, D. L. and Sojka, R. E. (2014) Erosion: Irrigation-induced. Reference module in Earth Systems and Environmental Sciences (online database). Elsevier, Oxford, U. K. (Accepted 14 Jan. 2014).
  • Flerchinger, G. N. and Lehrsch, G. A. and McCool, D. K. (2013) Freezing and thawing processes. Reference module in Earth Systems and Environmental Sciences (online database). Elsevier, Oxford, U. K.
  • Lehrsch, G.A. and Bjorneberg, D.L. and Sojka, R.E. (2005) Erosion: Irrigation-induced. In: Hillel, D. (ed.) Encyclopedia of Soils in the Environment. Vol. 1, pp. 456-463. Elsevier, Ltd, Oxford, U.K.
  • Flerchinger, G.N. and Lehrsch, G.A. and McCool, D.K. (2005) Freezing and thawing processes. In: Hillel, D. (ed.) Encyclopedia of Soils in the Environment. Vol. 2, pp. 104-110. Elsevier, Ltd, Oxford, U.K.
  • Robbins, Charles W. and Lehrsch, Gary A. (1998) Cheese whey as a soil conditioner. In: Wallace, A. and Terry, R.E. (eds.) Handbook of Soil Conditioners: Substances that enhance the physical properties of soil. pp. 167-186. Marcel Dekker, Inc., New York.
  • Lehrsch, G.A. (1995) Soil - Temporal variation in aggregate stability. In: McGraw-Hill Yearbook of Science & Technology - 1996. pp. 311-313. McGraw-Hill Inc., New York.
  • Lehrsch, G.A. and Sojka, R.E. and Jolley, P.M. (1993) Freezing effects on aggregate stability of soils amended with lime and gypsum. In: Poesen, J.W.A. and Nearing, M.A. (eds.) Soil Surface Sealing and Crusting. Catena Supplement, No. 24. pp. 115-127. Catena Verlag, Germany. ISBN 3-923381-33-6.

Conference or Workshop Item

  • Lentz, R. D. and Westermann, D. T. and Lehrsch, G. A. (2013) Reducing nutrient losses in runoff from furrow irrigation. Vol. 10, p. 60-66. In Pettygrove, S. (ed.) Proc. of the Western Nutr. Mgmt. Conf. USA-NV-Reno, 2013/03/07-08. Intl. Plant Nutr. Instit., Brookings, SD.
  • Lentz, R. D. and Lehrsch, G. A. (2012) Nitrogen availability from manure in years following a one-time application. Vol. 6, p. 61-67. In Proc. of the Idaho Nutr. Mgmt. Conf. USA-ID-Jerome, 2012/03/08. Univ. of Idaho Extension, Twin Falls.
  • Sojka, R. E. and Lehrsch, G. A. and Kostka, S. J. and Reed, J. L. and Koehn, A. C. and Foerster, J. A. (2009) Soil water measurements relevant to agronomic and environmental functions of chemically treated soil. p. 117-144. In Rohde, A. M. and Martin, C. and Otis, G. (eds.) Pesticide formulations and delivery systems, 28th vol.: Global trends and regulatory drivers in the crop protection industry. J. ASTM Intl. Spec. Tech. Publ. STP 1507. ASTM Intl., West Conshohocken, PA.
  • Lehrsch, G. and Sojka, R. and Westermann, D. (2008) Nitrogen placement, row spacing, and water management for furrow-irrigated field corn. Vol. 4, pp. 42-48. In: Moore, A. (ed.) Proc. of the 4th Idaho Nutrient Management Conference. USA-ID-Jerome, 2008/03/04. Univ. of Idaho Ext., Twin Falls.
  • Brown, B. and Johnson-Maynard, J. and Leytem, A. and Lentz, R. and Lehrsch, G. (2006) Dairy manure/compost N release for sugarbeets and subsequent wheat. Vol. 3, pp. 13-18. In: Proceedings of the Idaho Nutrient Management Conference. USA-ID-Twin Falls, 2006/03/07. Univ. of Idaho Ext., Moscow.
  • Kincaid, D.C. and Lehrsch, G.A. (2001) The WEPP model for runoff and erosion prediction under center pivot irrigation. pp. 115-118. In: Ascough, J.C., II and Flanagan, D.C. (eds.) Soil erosion research for the 21st Century. Proc. Int. Symp. USA-HI-Honolulu, 2001/01/03-05. ASAE, St. Joseph, MI.
  • Lehrsch, G.A. and Kincaid, D.C. (2001) Sprinkler droplet energy effects on infiltration and near-surface, unsaturated hydraulic conductivity. pp. 283-286. In: Bosch, D. D. and King, K. W. (eds.) Preferential flow: Water movement and chemical transport in the environment. Proc. 2nd Int. Symp. USA-HI-Honolulu, 2001/01/03-05. ASAE, St. Joseph, MI.
  • Wright, J.L. and Westermann, D.T. and Lehrsch, G.A. (1998) Studying nitrate-N leaching with a bromide tracer in an irrigated silt loam soil. pp. 229-242. In: Schaack, J. and Freitag, A. W. and Anderson, S. S. (eds.) Best Management Practices for Irrigated Agriculture and the Environment. Proc. of the 1997 Water Mgmt. Conf. USA-ND-Fargo, 1997/07/16-19. USCID, Denver, CO.
  • Lehrsch, G.A. (1997) Aggregate stability response to freeze-thaw cycles. pp. 165-171. In: Iskandar, I.K. and Wright, E.A. and Radke, J.K. and Sharratt, B.S. and Groenevelt, P.H. and Hinzman, L.D. (eds.) Proceedings Intl. Symposium on Physics, Chemistry, and Ecology of Seasonally Frozen Soils. USA-AK-Fairbanks, 1997/06/10-12.
  • Lehrsch, G.A. and Kincaid, D.C. and Lentz, R.D. (1996) Polyacrylamide sprayed on soil surfaces can stabilize soil aggregates. pp. 533-538. In: Proc. of Conf. 27. Erosion control technology ... bringing it home. USA-WA-Seattle, 1996/02/27-03/01. Int. Erosion Control Assoc., Steamboat Springs, CO.
  • Kincaid, D.C. and Lentz, R.D. and Lehrsch, G.A. (1996) Spray patterns from fan-type nozzles for applying PAM to soil surfaces. pp. 457-466. In: Proc. of Conf. 27. Erosion control technology ... bringing it home. USA-WA-Seattle, 1996/02/27-03/01. Int. Erosion Control Assoc., Steamboat Springs, CO.
  • Carter, D.L. and Westermann, D.T. and Sojka, R.E. and Meek, B.D. and Wright, J.L. and Brown, M.J. and Lehrsch, G.A. (1995) Controlling nitrate leaching and erosion on irrigated land. pp. 27-30. In: Proc. Clean Water--Clean Environment--21st Century, Team Agriculture--Working to protect Water Resources. Vol. II: Nutrients. USA-MO-Kansas City, 1995/03/05-08. USDA and ASAE, St. Joseph, MI.
  • Lehrsch, Gary A. and Robbins, Charles W. (1994) Cheese whey as an amendment to disturbed lands: Effects on soil hydraulic properties. pp. 330-336. In: Proc. Int. Land Reclamation and Mine Drainage Conf. and Third Int. Conf. on the Abatement of Acidic Drainage. USA-PA-Pittsburgh, 1994/04/24-29.
  • Sojka, R.E. and Lehrsch, G.A. and Westermann, D.T. (1994) Water or nitrogen placement and leaching from furrow irrigation. pp. 625-628. In: IN: Proc. Conf. Agricultural Research to Protect Water Quality (Vol 2. Poster presentations). USA-MN-Minneapolis, 1993/02/21-24.
  • Lehrsch, G.A. and Sojka, R.E. and Carter, D.L. and Jolley, P.M. (1990) Effects of freezing on aggregate stability of soils differing in texture, mineralogy, and organic matter content. pp. 61-69. In: Cooley, K.R. (ed.) Proc. Int. Symp. Frozen soil impacts on agricultural range, and forest lands. USA-WA-Spokane, 1990/03/21-22.

Technical Bulletin

  • Lehrsch, G.A. (1997) Aggregate stability response to freeze-thaw cycles. US Army Cold Regions Research and Engingeering Laboratory Special Report No. 97-10. NTIS, Springfield, VA.
  • Lehrsch, G.A. and Kincaid, D.C. and Lentz, R.D. (1996) PAM Spray effects on sugarbeet emergence. In: Sojka, R.E. and Lentz, R.D. (eds.) Managing irrigation-induced erosion and infiltration with polyacrylamide. University of Idaho Miscellaneous Publication No. 101-96. pp. 115-118.
  • Lehrsch, Gary A. and Robbins, Charles W. (1994) Cheese whey as an amendment to disturbed lands: Effects on soil hydraulic properties. USDI Bureau of Mines Special Publication No. SP06C-94. NTIS, Springfield, VA. pp. 330-336.
  • Lehrsch, G.A. and Sojka, R.E. and Carter, D.L. and Jolley, P.M. (1990) Effects of freezing on aggregate stability of soils differing in texture, mineralogy, and organic matter content. CRREL Special Report No. 90-1. US Army Cold Regions Res. and Engr. Lab, Hanover, NH. pp. 61-69.

Manuscripts Submitted, in Review or Revision, or in Preparation

  • Lehrsch, G. A. and Lentz, R. D. and Westermann, D. T. and Kincaid, D. C. Nutrient loads and sediment losses in sprinkler irrigation runoff affected by compost and manure. J. Soil Water Conserv. (Submitted, revised, returned 12 Dec. 2013).
  • Lehrsch, G. A. and Brown, B. and Lentz, R. D. and Johnson-Maynard, J. and Leytem, A. B. Sugarbeet yield and quality when fertilized with compost or manure. Agron. J. (Submitted and now being revised as of 19 Feb. 2014).
  • Lehrsch, G. A. and Brown, B. and Lentz, R. D. and Johnson-Maynard, J. and Leytem, A. B. Compost and manure effects on sugarbeet N uptake, recovery, and N use efficiency. For submission to Agronomy Journal. In Preparation.
  • Lehrsch, G. A. and Brown, B. and Lentz, R. D. and Johnson-Maynard, J. and Leytem, A. B. Winter wheat yield, quality, and nitrogen uptake following compost- or manure-fertilized sugarbeet. For submission to Agronomy Journal. In Preparation.

Other Major Articles

  • Lehrsch, G. A. 1976. Sewage effluent: site considerations for spray disposal. pp. 94-104. In R. L. Cunningham (ed.) Soils and environmental quality. Agron. Series 45, Dept. of Agron., The Pennsylvania State Univ., Univ. Park.
  • Lehrsch, G. A. 1979. Estimating infiltration into reclaimed land. pp. 169-174. In S. B. Carpenter (ed.) Proc. Symp. on Surface Mining Hydrology, Sedimentology, and Reclamation, Lexington, KY. 4-7 Dec 1979. Office of Engineering Services, Univ. of Kentucky, Lexington.
  • Lehrsch, G. A. 1979. Controlling water pollution from fly ash disposal areas. Master of Environmental Pollution Control Paper. The Pennsylvania State Univ., Univ. Park.
  • Lehrsch, G. A. 1981. Infiltration and erodibility characteristics of a fly ash disposal area. M.S. Thesis, The Pennsylvania State Univ., Univ. Park.
  • Lehrsch, G. A., D. E. Baker, and D. D. Fritton. 1981. Infiltration into a reclaimed fly ash disposal site. pp. 639-661. In Proc. of Fourth Annual Madison Conf. of Applied Research and Practice on Municipal and Industrial Waste, Madison, WI. 28-30 Sep 1981. Univ. of Wisconsin-Extension, Madison.
  • Lehrsch, G. A. 1985. Soil surface roughness as affected by rainfall, cultivation, and crop canopy development. Ph.D. diss., Mississippi State Univ., Miss. State. Diss. Abstr. #86-09780.

Other Publications

  • Buehring, N. W., F. D. Whisler, G. Lehrsch, and W. C. Caldwell. 1981. Fuel consumption for various tillage operations on a Leeper silty clay soil. pp. 9. In Abstracts of Tech. Papers, South. Assoc. Agric. Scient., Southern Branch of Am. Soc. of Agron., Madison, WI. 1-4 Feb 1981. Atlanta, GA.
  • Whisler, F. D., N. W. Buehring, G. A. Lehrsch, J. K. Young, and R. W. Henderson. 1981. Water usage in minimum tillage soybean production systems. pp. 5. In Abstracts of Tech. Papers, South. Assoc. Agric. Scient., Southern Branch of Am. Soc. of Agron., Madison, WI. 1-4 Feb 1981. Atlanta, GA.
  • Buehring, N. W., B. C. Caldwell, F. D. Whisler, and G. Lehrsch. 1982. Grain sorghum and soybean yield responses in a rotation system. pp. 12. In Abstracts of Tech. Papers, South. Assoc. Agric. Scient., Southern Branch of Am. Soc. of Agron., Madison, WI. 7-10 Feb 1982. Orlando, FL.
  • Whisler, F. D., G. A. Lehrsch, and N. W. Buehring. 1982. Apparent water usage with different weed control measures in double-cropping soybean systems. pp. 9. In Abstracts of Tech. Papers, South. Assoc. Agric. Scient., Southern Branch of Am. Soc. of Agron., Madison, WI. 7-10 Feb 1982. Orlando, FL.
  • Acock, B., F. D. Whisler, A. Trent, G. A. Lehrsch, and H. F. Hodges. 1982. Validation of the GLYCIM soil temperature subroutine. pp. 13 (Abstract). In Program and Abstracts: Workshop on Crop Simulation. Biological System Simulation Group. 16-18 Mar 1982. Auburn, AL.
  • Trent, A., F. D. Whisler, H. F. Hodges, and G. A. Lehrsch. 1982. Validation of a micro-computer based irrigation scheduling program. pp. 21 (Abstract). In Program and Abstracts: Workshop on Crop Simulation. Biological System Simulation Group. 16-18 Mar 1982. Auburn, AL.
  • Buehring, N. W., F. D. Whisler, C. Hagedorn, and G. Lehrsch. 1984. No-till soybean response to winter annual legumes. pp. 10. In Abstracts of Tech. Papers, South. Assoc. of Agric. Scient., Southern Branch of Am. Soc. Agron., Madison, WI. 5-8 Feb 1984. Nashville, TN.
  • Lehrsch, G. A. 1989. Kudzu. Reclam. Newsletter 12(1):1.
  • Robbins, C. W., and G. A. Lehrsch. 1991. Cottage cheese (acid) whey effects on chemical and physical properties of a sodic soil. pp. 424. In Agronomy abstracts. Am. Soc. of Agron., Madison, WI. Western Soc. Soil Sci. 23-27 Jun 1991. Logan, UT.
  • Sojka, R. E., G. A. Lehrsch, and D. T. Westermann. 1991. Dry-side banding and furrow rotation to reduce nitrate leaching in furrow irrigated corn. pp. 341-342. In Agronomy abstracts. Am. Soc. of Agron., Madison, WI. 27 Oct-1 Nov 1991. Denver, CO.
  • Meek, B. D., D. T. Westermann, and G. A. Lehrsch. 1993. Potential for denitrification in irrigated silt loam soils of southern Idaho. pp. 415. In Agronomy abstracts. ASA, Madison, WI.
  • Wright, J. L., D. T. Westermann, and G. A. Lehrsch. 1994. Downward movement of nitrate-N in irrigated soils of southern Idaho. pp. 324-325. In Agronomy abstracts. ASA, Madison, WI.
  • Wright, J. L., D. T. Westermann, and G. A. Lehrsch. 1998. Nitrate-N leaching studied with a bromide tracer in an irrigated silt loam soil. pp. 18. In Abstracts: Eighth Annual Nonpoint Source Water Quality Monitoring Results Workshop, Boise, ID. 6-8 Jan 1998. Idaho Dept. of Health and Welfare, Div. of Environ. Quality, Boise, ID.

Presentations at Scientific Meetings:

  • Lehrsch, G. A., and D. E. Baker. 1980. Coal ash stabilization. Abstract No. 12 In Poster Session Abstracts. XIII AUA-ANL Biology Symp., Argonne, IL. 21-22 Apr 1980. Argonne National Laboratory, Argonne, IL.
  • Lehrsch, G. A., D. E. Baker, and D. D. Fritton. 1980. Infiltration into fly ash disposal areas. p. 15 (Abstract). In Invited Papers and Abstracts of Contributed Papers. Northeastern Branch of Am. Soc. of Agron., Madison, WI. 29 Jun-2 Jul 1980. Univ. Park, PA.
  • Lehrsch, G. A., F. D. Whisler, N. W. Buehring, and N. Edwards. 1981. A profile water content analysis procedure to detect differences in water usage in minimum tillage soybean production systems. Agron. Abstracts 73:215 (Abstract). Am. Soc. of Agron., Madison, WI. 29 Nov-4 Dec 1981. Atlanta, GA.
  • Lehrsch, G. A., J. K. Young, and F. D. Whisler. 1982. Penetration resistance of Mississippi soils as affected by bulk density and moisture content. Agron. Abstracts 74:163 (Abstract). Am. Soc. of Agron., Madison, WI. 28 Nov-3 Dec 1982. Anaheim, CA.
  • Lehrsch, G. A., N. W. Buehring, and F. D. Whisler. 1984. Fuel consumption for soybean tillage systems on a Leeper silty clay. Abstracts of Tech. Papers 11:12 (Abstract). South. Assoc. of Agric. Scient., Southern Branch of Am. Soc. of Agron., Madison, WI. 5-8 Feb 1984. Nashville, TN.
  • Lehrsch, G. A., F. D. Whisler, and N. W. Buehring. 1984. Plant extractable water for soybeans and grain sorghum as affected by crop rotation and tillage. Agron. Abstracts 76:251 (Abstract). Am. Soc. of Agron., Madison, WI. 25-30 Nov 1984. Las Vegas, NV.
  • Lehrsch, G. A., F. D. Whisler, and N. W. Buehring. 1985. Influence of planting date, winter wheat, and soybean row spacing on plant extractable water for double-cropped soybeans. Abstracts of Tech. Papers 12:6 (Abstract). South. Assoc. of Agric. Scient., Southern Branch of Am. Soc. of Agron., Madison, WI. 3-6 Feb 1985. Biloxi, MS.
  • Lehrsch, G. A., M. J. M. Romkens, and F. D. Whisler. 1985. Spatial variation of parameters describing soil surface roughness. Agron. Abstracts 77:208 (Abstract). Am. Soc. of Agron., Madison, WI. 1-6 Dec 1985. Chicago, IL.
  • Lehrsch, G. A., F. D. Whisler, M. J. M. Romkens, and N. W. Buehring. 1986. Effect of simulated rainfall on soil surface roughness under a developing soybean canopy. Agron. Abstracts 78:246 (Abstract). Am. Soc. of Agron., Madison, WI. 30 Nov-5 Dec 1986. New Orleans, LA.
  • Lehrsch, G. A., and L. D. Meyer. 1987. Estimating soil interrill erodibility. Agron. Abstracts 79:242 (Abstract). Am. Soc. of Agron., Madison, WI. 29 Nov-4 Dec 1987. Atlanta, GA.
  • Lehrsch, G. A., M. J. Brown, and P. M. Jolley. 1988. Furrow erosion as affected by aggregate stability changes in a Portneuf silt loam. Agron. Abstracts 80:280 (Abstract). Am. Soc. of Agron., Madison, WI. 27 Nov-2 Dec 1988. Anaheim, CA.
  • Lehrsch, G. A., and P. M. Jolley. 1989. Temporal variation in the aggregate stability of eight western soils. p. 17. In Western Society of Soil Science and Western Society of Crop Science Abstracts. Am. Soc. of Agron., Madison, WI.
  • Lehrsch, G. A., and P. M. Jolley. 1989. Temporal variation in the aggregate stability of 14 U.S. soils. p. 284. In Agron. Abstracts. Am. Soc. of Agron., Madison, WI. 15-20 Oct 1989. Las Vegas, NV.
  • Lehrsch, G. A., R. E. Sojka, D. L. Carter, and P. M. Jolley. 1990. Effects of freezing on aggregate stability of soils differing in texture, mineralogy, and organic matter content. p. 41 (Abstract). In Proc. of Pacific Div., Am. Assoc. for Adv. of Sci., Vol. 9, Part 1, Program with Abstracts. AAAS, San Francisco, CA.
  • Lehrsch, G. A., and D. E. Baker. 1990. Fly ash erodibility. (Poster) Annual Meeting of the Soil and Water Conservation Society, Salt Lake City, UT, July-August, 1990.
  • Lehrsch, G. A., R. E. Sojka, D. L. Carter, and P. M. Jolley. 1990. Freezing effects on aggregate stability of soils differing in texture, mineralogy, and organic matter content. p. 319. In Agron. Abstracts. Am. Soc. of Agron., Madison, WI. 21-26 Oct 1990. San Antonio, TX.
  • Lehrsch, G. A., R. E. Sojka, and P. M. Jolley. 1991. Freezing effects on aggregate stability of soils amended with lime and gypsum. Agron. Abstracts 83:335. Am. Soc. of Agron., Madison, WI. 27 Oct- 1 Nov 1991. Denver, CO.
  • Lehrsch, G. A., R. E. Sojka, and D. T. Westermann. 1992. Nitrate movement in a Portneuf silt loam under furrow irrigation. p. 14. In Abstracts: Second Annual Nonpoint Source Water Quality Monitoring Results Workshop. Div. of Environmental Quality, Idaho Dept. of Health and Welfare, Boise. 14-16 Jan 1992. Boise, ID.
  • Lehrsch, G. A., M. J. Brown, and P. M. Jolley. 1992. Growing season changes in furrow erosion and aggregate stability in a Portneuf silt loam. p. 437, 446. In Agron. Abstracts. Am. Soc. of Agron., Madison, WI. 21-25 Jun 1992. Santa Barbara, CA.
  • Lehrsch, G. A., and P. M. Jolley. 1992. Temporal changes in aggregate stability. p. 57-58. In D. S. Chanasyk (ed.) Proceedings of the 2nd International Symposium on Agricultural Techniques in Cold Regions, Edmonton, Alberta, Canada. 4-7 Aug 1992. Dept. of Soil Science, Univ. of Alberta, Edmonton, Alberta, Canada.
  • Lehrsch, G. A., M. J. Brown, and P. M. Jolley. 1992. Furrow erosion and aggregate stability changes in a Portneuf silt loam (abstract). Can. J. Soil Sci. 72:321-322. Abstracts of Tech. Papers, Annual Meeting of Canadian Land Reclamation Assoc. and Can. Soc. of Soil Sci., Edmonton, Alberta, Canada. 8-15 Aug 1992.
  • Lehrsch, G. A., and D. E. Baker. 1992. Fly ash erodibility. Can. J. Soil Sci. 72:322. Abstracts of Tech. Papers, Annual Meeting of Canadian Land Reclamation Assoc. and Can. Soc. of Soil Sci., Edmonton, Alberta, Canada. 8-15 Aug 1992.
  • Lehrsch, G. A., and C. W. Robbins. 1992. Cottage cheese (acid) whey effects on sodic soil aggregate stability. p. 330. In Agron. Abstracts. Am. Soc. of Agron., Madison, WI. 1-6 Nov 1992. Minneapolis, MN.
  • Lehrsch, G. A., R. E. Sojka, and D. T. Westermann. 1992. Nitrate movement in a Portneuf silt loam under furrow irrigation. p. 14. In Abstracts: Second Annual Nonpoint Source Water Quality Monitoring Results Workshop, Boise, ID. 14-16 Jan 1992. Div. Environ. Qual., Idaho Dept. Health and Welfare, Boise.
  • Lehrsch, G. A., and M. J. Brown. 1992. Furrow erosion and aggregate stability changes in southern Idaho. p. 39-40. In Proc. Nat. Irrigation-Induced Erosion and Water Quality Conf., Boise, ID. 31 Aug-2 Sep 1992.
  • Lehrsch, G. A., R. E. Sojka, and D. T. Westermann. 1993. Fertilizer placement effects on root development and nitrate leaching under furrow-irrigated field corn. p. 19. In Abstracts: Third Annual Nonpoint Source Water Quality Monitoring Results Workshop, Boise, ID. 5-7 Jan 1993. Div. Environ. Qual., Idaho Dept. Health and Welfare, Boise.
  • Lehrsch, G. A., and C. W. Robbins. 1993. Cottage cheese (acid) whey effects on the aggregate stability of sodic soil. Vol. 2, p. 885. In B.A. Zamora and R. E. Connolly (eds.) The challenge of integrating diverse perspectives in reclamation. Proc. 10th Annual Nat. Meet. of Am. Soc. Surface Mining and Reclamation, Spokane, WA. 16-19 May 1993. ASSMR, Princeton, WV.
  • Lehrsch, G. A., F. D. Whisler, and N. W. Buehring. 1993. Cropping system influences on extractable water for mono- and double-cropped soybean. p. 320. In Agronomy abstracts. ASA, Madison, WI.
  • Lehrsch, G. A., and C. W. Robbins. 1994. Cheese whey as an amendment to disturbed lands: Effects on soil hydraulic properties. p. 15. In Abstracts: Fourth Annual Nonpoint Source Water Quality Monitoring Results Workshop, Boise, ID. 4-6 Jan 1994. Div. Environ. Qual., Idaho Dept. Health and Welfare, Boise.
  • Lehrsch, G. A., and C. W. Robbins. 1994. Cheese whey effects on soil hydraulic properties. p. 36. In Agronomy abstracts. ASA, Madison, WI.
  • Lehrsch, G. A., and D. T. Westermann. 1995. Controlling nitrate leaching under furrow irrigation. p. 26. In Abstracts: Fifth Annual Nonpoint Source Water Quality Monitoring Results Workshop, Boise, ID. 3-5 Jan 1995. Div. Environ. Qual., Idaho Dept. Health and Welfare, Boise.
  • Lehrsch, G.A., R.E. Sojka, and D.T. Westermann. 1995. Urea placement and furrow irrigation effects on soil NO3-N under corn. p. 461. In Agronomy abstracts. ASA, Madison, WI.
  • Lehrsch, G.A., R.E. Sojka, and D.T. Westermann. 1995. N placement and furrow irrigation effects on soil nitrate-N under maize. p. 291. In Agronomy abstracts. ASA, Madison, WI.
  • Lehrsch, G.A., R.E. Sojka, and D.T. Westermann. 1996. Effects of N placement and furrow irrigation on soil nitrate-N under corn. p. 26. In Abstracts: Sixth Annual Nonpoint Source Water Quality Monitoring Results Workshop, Boise, ID. 9-11 Jan 1996. Idaho Dept. of Health and Welfare, Div. of Environ. Quality, Boise, ID.
  • Lehrsch, G.A., D.C. Kincaid, and R.D. Lentz. 1996. Organic polymer effects on soil penetration resistance, aggregate stability, and sugarbeet emergence. p. 284. In Agronomy abstracts. ASA, Madison, WI.
  • Lehrsch, G.A. 1997. Freeze-thaw cycles can increase near-surface aggregate stability. p. 264. In Agronomy abstracts. ASA, Madison, WI.
  • Lehrsch, G.A., and C.W. Robbins. 1998. Cheese whey utilization to improve soil physical properties under furrow irrigation. p. 23. In Abstracts: Eighth Annual Nonpoint Source Water Quality Monitoring Results Workshop, Boise, ID. 6-8 Jan 1998. Idaho Dept. of Health and Welfare, Div. of Environ. Quality, Boise, ID.

    References

    Dr. D. L. Bjorneberg
    Laboratory Director/Research Leader
    Northwest Irrigation and Soils Research Laboratory
    USDA-Agricultural Research Service
    3793 N. 3600 E.
    Kimberly, ID 83341-5076
    (208) 423-6521
    Dr. M.J.M. R?mkens
    Laboratory Director/Soil Physicist/Agricultural Engineer
    USDA-Agricultural Research Service
    National Sedimentation Laboratory
    598 McElroy Dr.
    Oxford, MS 38655
    (662) 232-2940