Projects

ECOLOGICALLY-BASED SOIL MANAGEMENT FOR SUSTAINABLE AGRICULTURE AND RESOURCE CONSERVATION Appropriated (D)   Accession Number: 409570

ALTERNATIVE MANAGEMENT PRACTICES FOR FARMING SYSTEMS UTILIZING MANURE Appropriated (D)   Accession Number: 410430

WATER QUALITY IMPROVEMENT FROM MANAGEMENT PRACTICES IN AGRICULTURAL WATERSHEDS Appropriated (D)   Accession Number: 411795

Publications

Will Sulfur Limit Bio-fuel Corn Production? - (Abstract)

Kovar, J.L., Karlen, D.L. 2007. Will Sulfur Limit Bio-fuel Corn Production? [CD-ROM]. In: ASA-CSSA-SSSA Annual Meeting Abstracts, Nov. 4-8, 2007, New Orleans, LA.

Patterns of sediment and phosphorus accumulation in a riparian buffer - (Abstract)

Tomer, M.D., Moorman, T.B., Kovar, J.L., James, D.E., Burkart, M.R 2007. Patterns of sediment and phosphorus accumulation in a riparian buffer [CD-ROM]. In: ASA-CSSA-SSSA Annual Meeting Abstracts, November 4-8, 2007, New Orleans, LA.

Comparison of the Phosphorus Sorption Characteristics of a Conservation Reserve Buffer and an Adjacent Crop Field - (Peer Reviewed Journal) - (11-Sep-07)

Effects of grazing management on stream bank erosion - (Abstract)

Haan, M.M., Russell, J.R., Kovar, J.L., Nellesen, S.L. 2007. Effects of grazing management on stream bank erosion [abstract]. American Forage and Grassland Council Conference Proceedings. 16:18.

Fractionation of Soil Phosphorus - (Book/Chapter) - (13-Jun-07)

Spatial Patterns of Sediment and Phosphorus in a Riparian Buffer, Western Iowa - (Peer Reviewed Journal)

Tomer, M.D., Moorman, T.B., Kovar, J.L., James, D.E., Burkart, M. 2007. Spatial Patterns of Sediment and Phosphorus in a Riparian Buffer, Western Iowa. Journal of Soil and Water Conservation. 62(5):329-338.

Selection of a Water Extractable Phosphorus Test for Manures and Biosolids As An Indicator of Runoff Loss Potential - (Peer Reviewed Journal)

Kleinman, P.J., Sullivan, D., Wolf, A., Brandt, R., Dou, Z., Elliott, H., Kovar, J.L., Leytem, A.B., Maguire, R., Moore Jr, P.A., Sharpley, A.N., Shober, A., Sims, T., Toth, J., Toor, G., Zhang, H., Zhang, T., Saporito, L.S. 2007. Selection of a Water-Extractable Phosphorus Test for Manures and Biosolids as an Indicator of Runoff Loss Potential. Journal of Environmental Quality. 36(5):1357-1367.

Effects of Forage Management on Pasture Productivity and Phosphorus Content - (Peer Reviewed Journal)

Haan, M.M., Russell, J.R., Powers, W.J., Kovar, J.L., Benning, J.L. 2007. Effects of forage management on pasture productivity and phosphorus content. Rangeland Ecology and Management. 60:311-318.

Phosphorus Uptake During Four Years by Different Vegetative Cover Types in a Riparian Buffer - (Peer Reviewed Journal)

Kelly, J.M., Kovar, J.L., Sokolowsky, R., Moorman, T.B. 2007. Phosphorus Uptake During Four Years by Different Vegetative Cover Types in a Riparian Buffer. Nutrient Cycling in Agroecosystems. 78:239-251.

Grazing Management Effects on Potential Sediment and Phosphorus Loss from Streambanks - (Abstract)

Moeller, S.L., Kovar, J.L., Russell, J.R., Haan, M.M. 2006. Grazing Management Effects on Potential Sediment and Phosphorus Loss from Streambanks. In: ASA-CSSA-SSSA Annual Meeting Abstracts. ASA-CSSA-SSSA Annual Meeting, Indianapolis, Indiana, November 12-16, 2006. 2006 CD-ROM.

Fall Surface-Applied Fluid P Movement Into Soil Limits Potential Loss to Erosion - (Trade Journal)

Kovar, J.L. 2006. Fall Surface-Applied Fluid P Movement Into Soil Limits Potential Loss to Erosion. Fluid Journal. 14:14-16.

Standardizing the Water-Soluble Phosphorus Test for Manures and Biosolids - (Abstract)

Sullivan, D., Kleinman, P.J., Wolf, A., Brandt, R., Dou, Z., Elliott, H., Kovar, J.L., Leytem, A.B., Maguire, R., Moore Jr, P.A., Sharpley, A.N., Shober, A., Sims, J.T., Toor, G., Zhang, H., Zhang, T. 2006. Standardizing the water-soluble phosphorus test for manures and biosolids. ASA-CSSA-SSSA Annual Meeting Abstracts.

Effects of Grazing Management on Pasture Characteristics Affecting Sediment and Nutrient Loads in Surface Waters - (Abstract) - (13-Jul-06)

Grazing Management Effects on Sediment and Phosphorus in Surface Runoff - (Peer Reviewed Journal)

Haan, M.M., Russell, J.R., Powers, W.J., Kovar, J.L., Benning, J.L. 2006. Grazing management effects on sediment and phosphorus in surface runoff. Rangeland Ecology and Management. 59:607-615.

Is Potassium Limiting No-Till Corn Yields? - (Proceedings/Symposium)

Karlen, D.L., Kovar, J.L. 2006. Is potassium limiting no-till corn yields? Proceedings of Great Plains Soil Fertility Conference. 11:206-211.

Positional Availability of Phosphorus from Fall-Applied Surface Bands - (Proceedings/Symposium)

Kovar, J.L. 2006. Positional availability of phosphorus from fall-applied surface bands. In: Fluid Fertilizer Foundation Symposium Proceedings, February 12-14, 2006, Scottsdale, AZ. 2006 CDROM.

No-Till Corn Response to Banded K on Des Moines Lobe Soils - (Proceedings/Symposium)

Karlen, D.L., Kovar, J.L. 2006. No-till corn response to banded K on Des Moines lobe soils. In: Fluid Fertilizer Foundation Symposium Proceedings. Fluid Feritlizer Forum 2006, February 12-14, 2006, Scottsdale, AZ. 2006 CD-ROM

Phosphorus Management and Water Quality Protection - (Other)

Wortmann, C., Helmers, M., Mallarino, A., Barton, C., Devlin, D., Pierzynski, G., Lory, J., Massey, R., Holz, J., Shapiro, C., Kovar, J.L. 2006. Phosphorus management and water quality protection. Heartland Water Quality Workgroup, Regional Workgroup Bulletin. In: The Midwest (RP187) Lincoln; University of Nebraska Press. p.23.

What Limits Phosphorus Fertilizer Efficiency? - (Abstract)

Kovar, J.L. 2005. What limits phosphorus fertilizer efficiency [CD-ROM]? In: ASA-CSSA-SSSA Annual Meeting Abstracts, Nov. 6-10, 2005, Salt Lake City, UT.

Plant Growth and Phosphorus Uptake Kinetics of Three Riparian Grass Species - (Abstract)

Kovar, J.L., Claassen, N. 2005. Plant growth and phosphorus uptake kinetics of three riparian grass species [abstract]. ASA-CSSA-SSSA Annual Meeting Abstracts. ASA-CSSA-SSSA Annual Meeting. Nov. 6-10, 2005, Salt Lake City, UT.

Potential Phosphorus Losses from Streambanks in Grazing Lands - (Abstract)

Moeller, S.L., Kovar, J.L., Russell, J.R. 2005. Potential phosphorus losses from streambanks in grazing lands [CD-ROM]. In: ASA-CSSA-SSSA Annual Meeting Abstracts, Nov. 6-10, 2005, Salt Lake City, UT.

Comparison of Phosphorus Sorption and Desorption from An Established Buffer and Adjacent Production Field - (Abstract)

Schroeder, P.D., Kovar, J.L. 2005. Comparison of phosphorus sorption and desorption from an established buffer and adjacent production field [CD-ROM]. In: ASA-CSSA-SSSA Annual Meeting Abstracts, Nov. 6-10, 2005, Salt Lake City, UT.

Evaluating the Influence of Storage Time, Sample Handling Method, and Filter Paper on the Measurement of Water Extractable Phosphorus in Animal Manures - (Peer Reviewed Journal)

Baum, K., Pierzynski, G., Kleinman, P.J., Kovar, J.L., Maguire, R., Moore Jr, P.A., Zhang, T. 2006. Evaluating the influence of storage time, sample handling method, and filter paper on the measurement of water extractable phosphorus in animal manures. Communications in Soil Science and Plant Analysis. 37:451-463.

Is K the Cinderella Nutrient for Reduced-Till Systems? - (Trade Journal)

Karlen, D.L., Kovar, J.L. 2005. Is K the Cinderella nutrient for reduced-till systems? Fluid Journal. 13(4):8-11.

Comparison of Organic and Inorganic Phosphorus Fractions in An Established Buffer and Adjacent Production Field - (Peer Reviewed Journal)

Schroeder, P.D., Kovar, J.L. 2006. Comparison of organic and inorganic phosphorus fractions in an established buffer and adjacent production field. Communications in Soil Science and Plant Analysis. 37:1219-1232.

Stream Bank Erosion under Different Riparian Land-Use Practices in Northeast Iowa - (Proceedings/Symposium)

Zaimes, G.N., Schultz, R.C., Isenhart, T.M., Mickelson, S.K., Kovar, J.L., Russell, J.R., Powers, W.J. 2005. Stream bank erosion under different riparian land-use practices in northeast Iowa. In: Proceedings of the North American Agroforestry Conference. 9th North American Agroforestry Conference, June 12-15, 2005, Rochester, MN. 2005 CD-ROM.

Evaluating the Influence of Storage Time, Sample Handling Method and Filter Paper on the Measurement of Water Extractable Phosphorus in Animal Manures - (Peer Reviewed Journal)

Baum, K., Pierzynski, G., Kleinman, P.J., Kovar, J.L., Maguire, R., Moore Jr, P.A., Zhang, T. Evaluating the Influence of Storage Time, Sample-handling Method, and Filter Paper on the Measurement of Water-Extractable Phosphorus in Animal Manures. Communications in Soil Science and Plant Analysis. 37(3-4):451-463.

Is K the Cinderella Nutrient for Reduced Tillage Systems? - (Proceedings/Symposium)

Karlen, D.L., Kovar, J.L. 2005. Is K the Cinderella nutrient for reduced tillage systems? [CD-ROM] In: Fluid Fertilizer Foundation Symposium Proceedings, Feb. 13-15, 2005, Scottsdale, Arizona.

Phosphorus Uptake in a Loess Hills Mixed Species Riparian Buffer - (Abstract)

Kelly, J.M., Kovar, J.L., Moorman, T.B., Sokolowsky, R. 2004. Phosphorus Uptake in a Loess Hills Mixed Species Riparian Buffer [CD-ROM]. ASA-CSSA-SSSA Annual Meeting Abstracts. Madison, Wisconsin.

Influence of Land-Use Practices on Stream Bank Erosion in Iowa - (Abstract)

Zaimes, G.N., Schultz, R.C., Isenhart, T.M., Mickelson, S.K., Kovar, J.L., Russell, J.R., Powers, W.P. 2004. Influence of Land-use Practices on Stream Bank Erosion in Iowa [CD-ROM]. In: ASA-CSSA-SSSA Annual Meeting Abstracts, Oct. 31-Nov. 4, 2004, Seattle, WA.

In-Situ Dynamics of Four Macronutrients in the Rhizosphere Soil Solution of Maize, Switchgrass, and Cottonwood - (Abstract)

Kovar, J.L., Kelly, J.M., Schroeder, P.D., Wang, Z.Y. 2005. In-situ dynamics of four macronutrients in the rhizosphere soil solution of maize, switchgrass, and cottonwood. In: Hartmann, A., Schmid, M., Wenzel, W., and Hinsinger, P., editors. 2004 Rhizosphere, Perspectives and Challenges - A Tribute to Lorez Hiltner, September 12-17, 2004, Neuherberg, Germany. p. 192.

Use of Anion Exchange Membranes to Characterize Positional Availability of Soil Phosphorus - (Abstract) - (26-Aug-04)

Soil-Root Interactions and Phosphorus Nutrition of Plants - (Book/Chapter)

Kovar, J.L., Claassen, N. 2005. Soil-root interactions and phosphorus nutrition of plants. Book Chapter. In: Sims, J.T. and Sharpley, A.N., editors. Phosphorus: Agriculture and the Environment. Madison, WI: ASA-CSSA-SSSA. p 379-414.

Rhizosphere Solution Chemistry and the Nutrient Status of Juvenile Corn, Cottonwood, and Switchgrass Plants - (Peer Reviewed Journal)

Wang, Z., Kelly, J.M., Kovar, J.L. 2005. Rhizosphere solution chemistry and the nutrient status of juvenile corn, cottonwood, and switchgrass plants. Plant and Soil Journal. 270:213-221.

Positional Availability of Phosphorus from Surface Fertilizer Bands - (Proceedings/Symposium)

Kovar, J.L., Schroeder, P.D., Washburn, Jr., K.L. 2004. Positional availability of phosphorus from surface fertilizer bands. In: A.J. Schlegel (ed.). Proceedings of Great Plains Soil Fertility Conference. March 2-3, 2004, Kansas State University, Manhattan, KS. p. 271-276.

Starter Composition and Hybrid Selection Affect Early Growth and Yield of Corn - (Proceedings/Symposium)

KOVAR, J.L. STARTER COMPOSITION AND HYBRID SELECTION AFFECT EARLY GROWTH AND YIELD OF CORN. FLUID FERTILIZER FOUNDATION SYMPOSIUM PROCEEDINGS. 2004. V. 21. P. 131-141.

In Situ Dynamics of Phosphorus in the Rhizosphere Solution of Five Species - (Peer Reviewed Journal)

Wang, Z., Kelly, J.M., Kovar, J.L. 2004. In situ dynamics of phosphorus in the rhizosphere solution of five species. Journal of Environmental Quality. 33:1387-1392.

Evaluating Starter Fertilizer Placement Options for Corn - (Abstract)

Kovar, J.L. 2003. Evaluating starter fertilizer placement options for corn [CD-ROM]. Indiana Crop Advisor Conference Abstracts. Purdue University. West Lafayette, IN.

Impacts of Cattle Grazing Management on Sediment and Phosphorus Loads in Surface Waters - (Proceedings/Symposium) - (10-Dec-03)

Efficient Use of Nutrients - Are We Ignoring the Hidden Half of the Crop? - (Abstract)

KOVAR, J.L. EFFICIENT USE OF NUTRIENTS - ARE WE IGNORING THE HIDDEN HALF OF THE CROP?. ASA-CSSA-SSSA ANNUAL MEETING ABSTRACTS. 2003. CD-ROM. MADISON, WI.

Early Growth and Nutrient Uptake of Transgenic and Non-Transgenic Corn Hybrids - (Abstract)

KOVAR, J.L., DOERGE, T.A. EARLY GROWTH AND NUTRIENT UPTAKE OF TRANSGENIC AND NON-TRANSGENIC CORN HYBRIDS. ASA-CSSA-SSSA ANNUAL MEETING ABSTRACTS. 2003. CD-ROM. MADISON, WI.

Predicting Phosphorus Loss in Runoff Using a Displacement Technique - (Abstract)

GASTON, L.A., KOVAR, J.L., SAUER, T.J. PREDICTING PHOSPHORUS LOSS IN RUNOFF USING A DISPLACEMENT TECHNIQUE. ASA-CSSA-SSSA ANNUAL MEETING ABSTRACTS. 2003. CD-ROM. MADISON, WI.

Growth and Phosphorus Accumulation of Bromegrass Following Phosphonate Application - (Abstract)

Boehm, J.L., Kovar, J.L., Allan, D.L. 2003. Growth and phosphorus accumulation of bromegrass following phosphonate application. ASA-CSSA-SSSA Annual Meeting Abstracts. CD-ROM. Madison, WI.

Land-Use Practice Impacts on Stream Bank Erosion with An Emphasis on Grazing Practices - (Abstract)

ZAIMES, G.N., SCHULTZ, R.C., ISENHART, T.M., MICKELSON, S.K., KOVAR, J.L., RUSSELL, J.R., POWERS, W.P. LAND-USE PRACTICE IMPACTS ON STREAM BANK EROSION WITH AN EMPHASIS ON GRAZING PRACTICES. ASA-CSSA-SSSA ANNUAL MEETING ABSTRACTS. 2003. CD-ROM. MADISON, WI.

Recommended Methods of Manure Analysis - (Abstract)

PETERS, J., COMBS, S., HOSKINS, B., JARMAN, J., KOVAR, J.L., WATSON, M., WOLF, A., WOLF, N. RECOMMEDED METHODS OF MANURE ANALYSIS. ASA-CSSA-SSSA ANNUAL MEETING ABSTRACTS. 2003. CD-ROM. MADISON, WI.

Effects of Grazing Management on Sediment and Phosphorus in Runoff - (Proceedings/Symposium)

Haan, M.M., Russell, J.R., Powers, W.J., Mickelson, S.K., Ahmed, S.I., Kovar, J.L., Schultz, R.C. 2003. Effects of grazing management on sediment and phosphorus in runoff. In: Prosser, Jr., P.J. (ed.). Proceedings Ninth International Symposium on Animal, Agricultural, and Food Processing Wastes, October 12-15, 2003. Raleigh, NC. p. 318-386.

Methods of Determination of P, K, Ca, Mg, and Trace Elements - (Book/Chapter)

KOVAR, J.L. METHODS OF DETERMINATION OF P, K, CA, MG, AND TRACE ELEMENTS. BOOK CHAPTER. 2003. AVAILABLE FROM: WWW.UWEX.EDU/CES/PUBS/PDF/A3769.PDF. UW EXTENSION.

Effective Starter Fertilizers for Corn in Conservation Tillage Systems - (Proceedings/Symposium)

KOVAR, J.L. EFFECTIVE STARTER FERTILIZERS FOR CORN IN CONSERVATION TILLAGE SYSTEMS. FLUID FERTILIZER FOUNDATION SYMPOSIUM PROCEEDINGS. 2003. V. 20. P. 230-240.

Turkey Litter As a Phosphorus Source for Corn - (Abstract)

KOVAR, J.L., SAUER, T.J., MOORMAN, T.B. TURKEY LITTER AS A PHOSPHORUS SOURCE FOR CORN. AMERICAN SOCIETY OF AGRONOMY MEETINGS. 2002. CD-ROM. MADISON, WI.

What Are the Best P and K Placement Options for Corn - (Abstract)

KOVAR, J.L. WHAT ARE THE BEST P AND K PLACEMENT OPTIONS FOR CORN. SOIL SCIENCE SOCIETY OF AMERICA ANNUAL MEETING. 2002. CD-ROM. MADISON, WI.

Grazing Management Systems to Minimize Phophorus Losses from Upland Pastures - (Abstract)

BOEHM, J.L., KOVAR, J.L., RUSSELL, J.R., HAAN, M.M., POWERS, W.J., MICKELSON, S.K., SCHULTZ, R.C. GRAZING MANAGEMENT SYSTEMS TO MINIMIZE PHOPHORUS LOSSES FROM UPLAND PASTURES. AGRONOMY ABSTRACTS. 2002. CD-ROM. MADISON, WI.

An Economically Sustainable Riparian Buffer to Promote Bank Stability and Reduce Phosphorus Loss in the Loess Hills - (Abstract)

KELLY, J.M., BURKART, M.R., KOVAR, J.L., MOORMAN, T.B., LOGSDON, S.D. AN ECONOMICALLY SUSTAINABLE RIPARIAN BUFFER TO PROMOTE BANK STABILITY AND REDUCE PHOSPHORUS LOSS IN THE LOESS HILLS. AMERICAN SOCIETY OF AGRONOMY. 2002. CD-ROM. MADISON, WI.

Reducing Soil Phosphorous by Hay Harvest - (Abstract)

GASTON, L., COOPER, D., KOVAR, J.L., BELL, P. REDUCING SOIL PHOSPHOROUS BY HAY HARVEST. AGRONOMY ABSTRACTS. 2002. CD-ROM. MADISON, WI.

Defining Cottonwood Uptake of Phosphorus Using Rhizosphere Solution Phase Mesurements - (Abstract)

WANG, Z., KELLY, M.J., KOVAR, J.L. DEFINING COTTONWOOD UPTAKE OF PHOSPHORUS USING RHIZOSPHERE SOLUTION PHASE MESUREMENTS. AGRONOMY ABSTRACTS. 2002. CD-ROM. MADISON, WI.

Agronomic Principles of Fertilizer Placement - (Review Article)

KOVAR, J.L. AGRONOMIC PRINCIPLES OF FERTILIZER PLACEMENT. PROSSER, P.J. EDITOR. ANNUAL FERTILIZER INDUSTRY ROUND TABLE. 2002. CD-ROM. FOREST HILL, MD.

Searching for More Effective Corn Starters in Conservation-Tillage Systems - (Trade Journal)

KOVAR, J.L. SEARCHING FOR MORE EFFECTIVE CORN STARTERS IN CONSERVATION-TILLAGE SYSTEMS. FLUID JOURNAL. 2003. V. 11(2). P. 8-11.

Greenhouse and Field Studies on Hay Harvest to Remediate High Phosphorus Soil - (Peer Reviewed Journal)

GASTON, L.A., EILERS, T.L., KOVAR, J.L., COOPER, D., ROBINSON, D.L. GREENHOUSE AND FIELD STUDIES ON HAY HARVEST TO REMEDIATE HIGH PHOSPHORUS SOIL. COMMUNICATION IN SOIL SCIENCE PLANT ANALYSIS. 2003. V. 34. p. 2085-2097.

Impact of Different Grazing Systems and Vegetative Filter Strips on Sediment and Nutrient Losses with Surface Runoff - (Proceedings/Symposium)

AHMED, S., MICKELSON, S.K., RUSSELL, J.R., POWERS, W.J., SCHULTZ, R.C., KOVAR, J.L. IMPACT OF DIFFERENT GRAZING SYSTEMS AND VEGETATIVE FILTER STRIPS ON SEDIMENT AND NUTRIENT LOSSES WITH SURFACE RUNOFF. AGRICULTURAL ENGINEERING INTERNATIONAL CONFERENCE PROCEEDINGS. 2002. PAPER NO. 022141.

Effects of Grazing Management on Sediment and Phosphorus Runoff - (Proceedings/Symposium)

HAAN, M.M., RUSSELL, J.R., POWERS, W.J., MICKELSON, S.K., KOVAR, J.L., SCHULTZ, R.C. EFFECTS OF GRAZING MANAGEMENT ON SEDIMENT AND PHOSPHORUS RUNOFF. AMERICAN FORAGE AND GRASSLAND COUNCIL PROCEEDINGS. 2002. V. 11. P. 292-296.

Grazing Systems to Maximize Forage and Minimize P, N, and Sediment Pollution of Streams - (Proceedings/Symposium)

POWERS, W., RUSSELL, J., HAAN, M., SCHULTZ, R., STAUFFER, E., ZAIMES, G., HUNKINS, B., KOVAR, J.L., BOEHM, J., MICKELSON, S. GRAZING SYSTEMS TO MAXIMIZE FORAGE AND MINIMIZE P, N, AND SEDIMENT POLLUTION OF STREAMS. AGRICULTURAL AND ENVIRONMENT CONFERENCE PROCEEDINGS. 2003. P. 23-35.

Factors Affecting N and P Needs in Starters: Formulations and Placement for Reduced-Tillage Corn - (Proceedings/Symposium)

KOVAR, J.L. FACTORS AFFECTING N AND P NEEDS IN STARTERS: FORMULATIONS AND PLACEMENT FOR REDUCED-TILLAGE CORN. FLUID FERTILIZER FOUNDATION SYMPOSIUM PROCEEDINGS. 2002. V. 19. P. 12-20.