Peter Kleinman, Ph.D.

  • Adjunct Associate Professor of Soil Science, USDA-ARS
Peter Kleinman, Ph.D.
USDA-ARS Pasture Systems and Watershed Management Research Unit
University Park, PA 16802
Work Phone: 814-865-3184


  1. Ph.D., Cornell University, Soil Science, 1999
  2. M.S., Cornell University, Natural Resource Policy and Management, 1995
  3. B.A., Cornell University, Biology and Society Program, 1985

Responsibilities and Interests:

Investigate processes controlling the fate of nutrients in landscapes and develop innovative management practices to minimize nutrient losses from agriculture. General interests include developing context-specific management recommendations through integrated, multidisciplinary research, improving understanding of how scale and complexity affect research inferences and combining the study of biophysical and social factors to promote the development and adoption of sustainable management practices. Advisor to students, state, federal and international organizations on nutrient management and related water quality issues.


Student Advisees:

Post doctoral

  • Anthony Buda (Ph.D., Penn State University), 2007-2009
  • Francirose Shigaki (Ph.D., University Sao Paulo, Brazil), 2006–2008


  • Emily Duncan, Dept. Crop and Soils, Penn State (degree expected 2015)
  • Soares Xerinda, Dept. Horticulture, Penn State (degree expected 2011)
  • Keisha Johnson, Dept. Crop and Soils, Penn State (degree expected 2011)
  • Annika Lindvall, Dept. of Soil and Environment, Swedish Agricultural University (degree expected 2010)
  • David Ruppert, Dept. Environmental Science, Univ. Maryland (degree expected 2010)
  • Deepak Jaiswald, Dept. Agricultural and Biological Engineering, Penn State (degree expected 2010)
  • Amelia Henry, Dept. Horticulture, Penn State (2008)
  • Brian Needelman, Dept. Crop and Soils, Penn State (2002)

M.S. students

  • Leonard Kibet, Dept. Agriculture, University Maryland Eastern Shore (2010)
  • David Verbree, Dept. Crop and Soils, Penn State (2008)
  • Dan Wagner, Dept. Ag. Engineering, Penn State (2007)
  • Elizabeth Brock, Dept. Crop and Soil Sciences, Cornell University (2005)
  • Erin James, Dept. Rural Sociology and Agricultural Economics, Penn State (2005)
  • Robert Vaughan, Nat. Res. Sciences and Landscape Architecture, Univ. Maryland (2004)
  • Jennifer Logan, Dept. Ag. Engineering, Penn State (2004)
  • Keisha Johnson, Dept. Agriculture, University of Maryland Eastern Shore (2004)

Undergraduate honors students

  • Michael Callahan, Dept. Agronomy, Penn State (2001)
  • Megan Marshall, Dept. Soil, Crop and Atmospheric Sciences, Cornell University (1998)


Peer reviewed journal and book chapters (updated August 2011)


  1. Sharpley, A.N., P.J.A. Kleinman, D.N. Flaten, and A.R. Buda. 2011. Critical Source Area Management of Agricultural Phosphorus: Experiences, Challenges and Opportunities. Water Sci. Tech. 64: 945-952.
  2. Wang, L., T. Liang, P.J.A. Kleinman, H. Cao. 2011. An experimental study on using rare earth elements to trace phosphorous losses from nonpoint sources. Chemosphere. Online First.
  3. Kleinman, P.J.A., A.N. Sharpley, R.W. McDowell, D. Flaten, A.R. Buda, L. Tao, L. Bergstrom and Q. Zhu. 2011. Managing Agricultural Phosphorus for Water Quality Protection: Principles for Progress. Plant and Soil 345: Online First.
  4. Johnson, K.N., P.J.A. Kleinman, D.B. Beegle, and H.A. Elliott. 2011. Effect of dairy manure slurry application in a no-till system on phosphorus runoff. Nutrient Cycl. Agroecos. 90: 201-212.
  5. Armstrong, A., E. James, R. Stedman and P. Kleinman. 2011. Influence of resentment in the New York City Conservation Reserve Enhancement Program. J. Soil Water Conserv. 66: 337-344.
  6. Kleinman, P.J.A., A.N. Sharpley, A.R. Buda, R.W. McDowell, and A.L. Allen. 2011. Soil controls of phosphorus runoff: management barriers and opportunities. Canad. J. Soil Sci. 91: 329-338.
  7. McDowell, R.W. and P.J.A. Kleinman. 2011. Efficiency of phosphorus cycling in different grassland systems. In: Lemaire, G., J. Hodgson, and A. Chabbi (eds.), Grassland Productivity and Ecosystem Services. CABI Publishing, Oxfordshire, UK.
  8. Johnson, K.N., A.L. Allen, P.J.A. Kleinman, F.M Hashem, A.N. Sharpley, and W.L. Stout. 2011. Effect of coal combustion byproducts on phosphorus runoff from a coastal plain soil. Commun. Soil Sci. Plan Anal. 42: 778-789.
  9. Maguire, R.O., P.J.A. Kleinman and D.B. Beegle. 2011. Novel manure management technologies in no-till and forage systems: Introduction to the special series. J. Environ. Qual. 40: 287–291.
  10. Pote, D.H., T.R. Way, P.J.A. Kleinman, P.A. Moore, J.J. Meisinger, K.R. Sistani, L.S. Saporito, A.L. Allen, and G.W. Feyereisen. 2011. Subsurface application of poultry litter in pasture and no-till soils. J. Environ. Qual. 40: 402-411.
  11. Brandt, R.C., H.A. Elliott, M.A.A. Adviento-Borbe, E.F. Wheeler, P.J.A. Kleinman, and D.B. Beegle. 2011. Influence of manure application method on odor emissions. J. Environ. Qual. 40: 431-437.
  12. Kibet, L.C., A.L. Allen, P.J.A. Kleinman, G.W. Feyereisen, C.D. Church, L.S. Saporito and T.R. Way. 2011. Phosphorus losses in surface runoff from a no-till Coastal Plain soil with surface and subsurface applied poultry litter. J. Environ. Qual. 40: 412-420.
  13. Rotz, C.A., P.J.A. Kleinman, C.J. Dell, T.L. Veith and D.B. Beegle. 2011. Environmental and economic comparisons of manure application methods in farming systems. J. Environ. Qual. 40: 438-448.
  14. Maguire, R.O., P.J.A. Kleinman, C. Dell, D.B. Beegle, R.C. Brandt, J.M. McGrath and Q.M. Ketterings. 2011. Manure management in reduced tillage and grassland systems: A review. J. Environ. Qual. 40: 292-301.
  15. Buda, A.R., T.L. Veith, G.J. Folmar, G.W. Feyereisen, R.B. Bryant, C.D. Church, J.P. Schmidt, C.J. Dell, and P.J. Kleinman. 2011. USDA-ARS Mahantango Creek Watershed, Pennsylvania, United States: long-term precipitation database. Water Resources Research: 10.1029/2010WR010058.
  16. Buda, A.R., G.W. Feyereisen, T.L. Veith, G.J. Folmar, R.B. Bryant, C.D. Church, J.P. Schmidt, C.J. Dell, and P.J. Kleinman. 2011. USDA-ARS Mahantango Creek Watershed, Pennsylvania, United States: long-term stream discharge database. Water Resources Research 47, doi: 10.1029/2010WR010059.
  17. Church, C.D., T.L. Veith, G.J. Folmar, A.R. Buda, G.W. Feyereisen, R.B. Bryant, J.P. Schmidt, C.J. Dell, and P.J. Kleinman. 2011. USDA-ARS Mahantango Creek Watershed, Pennsylvania, United States: long-term water quality database. Water Resources Research 47, doi: 10.1029/2010WR010060.
  18. Bryant, R.B., T.L. Veith, G.W. Feyereisen, A.R. Buda, G.J. Folmar, C.D. Church, J.P. Schmidt, C.J. Dell, and P.J. Kleinman. 2011. USDA-ARS Mahantango Creek Watershed, Pennsylvania, United States: physiography and history. Water Resources Research 47, doi:10.1029/2010WR010056.


  1. Strock, J., P. Kleinman, K. King and J.A. Delgado. 2010. Drainage water management for water quality protection. J. Soil and Water Conserv. 65: 131A-136A.
  2. Tao, L., S. Wen-Chong, W. Ling-Qing, P.J.A. Kleinman and C.A.O. Hong-Ying. 2010. Interactions between exogenous rare-earth elements and phosphorus leaching in packed soil columns. Pedosphere 20: 616-622.
  3. Church, C.D., P.J.A. Kleinman, R.B. Bryant, L.S. Saporito and A.L. Allen. 2010. Occurrence of arsenic and phosphorus in ditch flow from litter-amended soils and barn areas. J. Environ. Qual. 39: 2080-2088.
  4. Feyereisen, G.W., P.J.A. Kleinman, G.J. Folmar, L.S. Saporito, C.D Church, T.R. Way, and A.L Allen. 2010. Effect of direct incorporation of poultry litter on phosphorus leaching from Coastal Plain soils. J. Soil Water Conserv. 65: 243-251.
  5. Verbree, D.A., S.W. Duiker, and P.J.A. Kleinman. 2010. Runoff losses of sediment and phosphorus from no-till and cultivated soils receiving dairy manure. J. Environ. Qual. 39: 1762-1770.
  6. Kleinman, P., A. Allen and B. Needelman. 2010. The role of drainage ditches in nutrient transfers from heavily manured fields of the Delmarva Peninsula. p. 107-124. In: M. Moore and R. Kroger (eds.), Agricultural Drainage Ditches: Mitigation Wetlands of the 21st Century.
  7. Henry, A., N.F. Chavez, P.J.A. Kleinman and J.P Lynch. 2010. Will nutrient-efficient genotypes mine the soil? Effects of genetic differences in root architecture in common bean (Phaseolus vulgaris L.) on soil phosphorus depletion in a low-input agro-ecosystem in Central America. Field Crops Res. 115: 67-78.
  8. Buda, A.R., C. Church, P.J.A. Kleinman, L.S. Saporito, B.G. Moyer, and T. Liang. 2010. Using rare earth elements to control phosphorus and track manure in runoff. J. Environ. Qual.


  1. Kleinman, P.J.A., A.N. Sharpley, L.S. Saporito, A.R. Buda and R.B. Bryant. 2009. Application of manure to no-till soils: Phosphorus losses by sub-surface and surface pathways. Nutrient Cycl. Agroecos. 84: 215-227.
  2. Buda, A.R., P.J.A. Kleinman, M.S. Srinivasan, R.B. Bryant, G.W. Feyereisen. 2009. Effects of hydrology and field management on phosphorus transport in surface runoff. J. Environ. Qual. 38: 2273-2284.
  3. Buda, A.R., P.J.A. Kleinman, M.S. Srinivasan, R.B. Bryant, G.W. Feyereisen. 2009. Factors influencing surface runoff generation from two agricultural hillslopes in central Pennsylvania. Hydrol. Process. 23: 1295-1312.
  4. Rotz, C.A., K.J. Soder, R.H. Skinner, C.J. Dell, P.J. Kleinman, J.P. Schmidt and R.B. Bryant. 2009. Grazing can reduce the environmental impact of dairy production systems. Forage and Grazinglands, Sept.
  5. Sharpley, A.N., P.J.A. Kleinman, P. Jordan, L. Bergström, and A.L. Allen. 2009. Evaluating the success of phosphorus management from field to watershed. J. Environ. Qual. 38: 1981-1988.
  6. Shigaki, F., J.P. Schmidt, P.J.A. Kleinman, A.N. Sharpley, and A.L. Allen. 2009. Nitrogen fate in drainage ditches of the Coastal Plain after dredging. J. Environ. Qual. 38: 2449-2457.


  1. Shigaki, F., P.J.A. Kleinman, J.P. Schmidt, A.N. Sharpley and A.L. Allen. 2008. Impact of dredging on phosphorus transport in agricultural drainage ditches of the Atlantic Coastal Plain. J. Amer. Water Res. Assoc. 44: 1500–1511.
  2. Bryant, R.B., T.L. Veith, P.J.A. Kleinman, and W.J. Gburek. 2008. Cannonsville Reservoir and Town Brook Watersheds: Documenting conservation efforts to protect New York City's drinking water. J. Soil Water Conserv. 63: 339–344.
  3. Henry, A., P.J.A. Kleinman, and J.P. Lynch. 2008. Phosphorus runoff from a phosphorus deficient soil under common bean (Phaseolus vulgaris L.) and soybean (Glycine max L.) genotypes with contrasting root architecture. Plant Soil: electronic publication.
  4. García, A.M., T.L. Veith, P.J.A. Kleinman, C.A. Rotz, and L.S. Saporito. 2008. Assessing manure management strategies through small-plot research and whole-farm modeling. J. Soil Water Conserv. 63:204–211.
  5. Kleinman, P.J.A. and K. Soder. 2008. The impact of hybrid dairy systems on air, soil and water quality: Focus on Nitrogen and Phosphorus Cycling. p. 249–276. In: R.W. McDowell (ed), Environmental Impacts of Pasture-based Farming, CAB International, Oxfordshire, UK.
  6. Sharpley, A.N., P.J.A. Kleinman, A.L. Heathwaite, W.J. Gburek, J.L. Weld, and G.J. Folmar. 2008. Integrating contributing areas and indexing phosphorus loss from agricultural watersheds. J. Environ. Qual. 37: 1488–1496.
  7. Sharpley, A.N., P.J.A. Kleinman, and J.L. Weld. 2008. Environmental soil phosphorus indices. p. 141–159. In: M.R. Carter and E.G. Gregorich (eds). Soil Sampling and Methods of Analysis, 2nd Ed. Canadian Society of Soil Science, CRC Press, Boca Raton, FL.
  8. McDowell, R.W., Z. Dou, J.D. Toth, B.J. Cade-Menun, P.J.A. Kleinman, K. Soder, L. Saporito. 2008. A comparison of phosphorus bioavailability in feed and dung of different dairy herds using 31P nuclear magnetic resonance spectroscopy. J. Environ. Qual. 37: 741–752.
  9. Vaughan, R.E., B.A. Needelman, P.J.A. Kleinman, and M.C. Rabenhorst. 2008. Morphology and characterization of ditch soils at an Atlantic Coastal Plain farm. Soil Sci. Soc. Am. J. 72: 660–669.
  10. Sharpley, A.N., P.J.A. Kleinman, A.L. Heathwaite, W.J. Gburek, G.J. Folmar, and J.P. Schmidt. 2008. Phosphorus loss from an agricultural watershed as a function of storm size. J. Environ. Qual. 37: 362–368.


  1. Srinivasan, M.S., P.J.A. Kleinman, A.N. Sharpley, T. Buob and W.J. Gburek. 2007. Hydrology of small field plots used to study phosphorus runoff under simulated rainfall. J. Envrion. Qual. 37: 1833-1842.
  2. Penn, C.J., R.B. Bryant, B. Needelman and P. Kleinman. 2007. Spatial distribution of soil phosphorus across selected New York dairy farm pastures and hay fields. Soil Sci. 172: 797-810.
  3. Vaughan, R.E., B.A. Needelman, P.J.A. Kleinman, and A.L. Allen. 2007. Vertical distribution of phosphorus in agricultural drainage ditch soils. J Environ Qual 36: 1895-1903.
  4. Kleinman, P.J.A., A.L. Allen, B.A. Needelman, A.N. Sharpley, P.A. Vadas, L.S. Saporito, G.J. Folmar and R.B. Bryant. 2007. Dynamics of phosphorus transfers from heavily manured coastal plain soils to drainage ditches. J. Soil and Water Conserv. 62: 225-235.
  5. Needelman, B.A., P.J.A. Kleinman, A.L. Allen and J.S. Strock. 2007. Managing agricultural drainage ditches for water quality protection. J. Soil and Water Conserv. 62: 171-178.
  6. Penn, C.J., R.B. Bryant, P.J.A. Kleinman and A.L. Allen. 2007. Sequestering dissolved phosphorus from ditch drainage water. J. Soil and Water Conserv. 62: 269-276.
  7. Sharpley, A, T. Krogstad, P. Kleinman, B. Haggard, F. Shigaki and L. Saporito. 2007. Managing natural processes in drainage ditches for non-point source phosphorus control. J. Soil and Water Conserv. 62: 197-206.
  8. Vadas, P.A., M.S. Srinivasan, P.J.A. Kleinman, J.P. Schmidt, and A.L. Allen. 2007. Subsurface nutrient transport in a ditch-drained agroecosystem. J. Soil and Water Conserv. 62: 178-188.
  9. Kleinman, P., D. Sullivan, A. Wolf, R. Brandt, Z. Dou, H. Elliott, J. Kovar, A. Leytem, R. Maguire, P. Moore, L. Saporito, A. Sharpley, A. Shober, T. Sims, J. Toth, G. Toor, H. Zhang, T. Zhang. 2007. Selection of a water extractable phosphorus test for manures and biosolids as an indicator of runoff loss potential. J. Environ. Qual. 36: 1357-1367.
  10. Vaughan, R.E., B.A. Needelman, P.J.A. Kleinman, and A.L. Allen. 2007. Spatial variation of soil phosphorus within a drainage ditch network. J. Environ. Qual. 36: 1096-1104.
  11. Brock, E.H., Q.M. Ketterings, and P.J.A. Kleinman. 2007. Measuring and predicting the phosphorus sorption capacity of manure amended soils. Soil Sci. 172: 266-278.
  12. Brock. E.H., Q.M. Ketterings, and P.J.A. Kleinman. 2007. Phosphorus leaching through intact soil cores as influenced by type and duration of manure application. Nutr. Cycl. Agroec. 77: 269-281.
  13. James, E., P. Kleinman, T. Veith, R. Stedman and A. Sharpley. 2007. Phosphorus contributions from pastured dairy cattle to streams of the Cannonsville Watershed, New York. J. Soil and Water Conserv. 62: 40-47.
  14. Vadas, P.A., R.D. Harmel and P.J.A. Kleinman. 2007. Transformations of soil and manure phosphorus after surface application of manure to field plots. Nutr. Cycl. Agroecosyst. 77: 83-99.
  15. Vadas, P.A., W.J. Gburek, A.N. Sharpley, P.J.A. Kleinman, P.A. Moore, Jr., M.L. Cabrera and R.D. Harmel. 2007. A model for phosphorus transformation and runoff loss for surface-applied manures. J. Environ. Qual. 36: 324-332.


  1. Elliott, H.A., R.C. Brandt, P.J.A. Kleinman, A.N. Sharpley, and D.B. Beegle. 2006. Estimating source coefficients for phosphorus site indices. J. Environ. Qual. 35: 2195-2201.
  2. Kleinman, P.J.A., A.N. Sharpley, A.M. Wolf, D.B. Beegle, H.A. Elliott, J.L. Weld and R. Brandt. 2006. Developing an environmental manure test for the Phosphorus Index. Commun. Soil Sci. Plant Anal. 37: 2137-2155.
  3. Kleinman, P.J.A., M.S. Srinivasan, C.J. Dell, J.P. Schmidt, A.N. Sharpley and R.B. Bryant. 2006. Role of rainfall intensity and hydrology in nutrient transport via surface runoff. J. Environ. Qual. 35: 1248-1259.
  4. Vadas, P.A. and P. J. A. Kleinman. 2006. Effect of methodology in estimating and interpreting water-extractable phosphorus in animal manures. J. Environ. Qual. 35: 1151-1159.
  5. Baum, K., G. Pierzynski, P. Kleinman, J. Kovar, R. Maguire, P.A. Moore and T. Zhang. 2006. Evaluating the influence of storage time, sampling handling method and filter paper on the measurement of water extractable phosphorus in animal manures. Commun. Soil Sci. Plant Anal. 37: 451-463.


  1. Kleinman, P.J.A., P. Salon, A.N. Sharpley and L.S. Saporito. 2005. Effect of cover crops established at time of corn planting on phosphorus runoff from soils before and after dairy manure application. J. Soil and Water Cons. 60: 311-322.
  2. Kleinman, P.J.A., M.S. Srinivasan, A.N. Sharpley and W.J. Gburek. 2005. Phosphorus leaching through intact soil columns before and after poultry manure applications. Soil Science. 170:153-166.
  3. Kleinman, P.J.A., A.M. Wolf, A.N. Sharpley, D.B. Beegle and L.S. Saporito. 2005. Survey of water extractable phosphorus in manures. Soil Sci. Soc. Am. J. 67. 701-708.
  4. Bechmann, M.E., P.J.A. Kleinman, Andrew N. Sharpley, and Lou S. Saporito. 2005. Freeze–thaw effects on phosphorus loss in runoff from manured and catch-cropped soils. J Environ Qual 34: 2301-2309.
  5. Sims, J.T. and P.J.A. Kleinman. 2005. Managing agricultural phosphorus for environmental protection. P. 1021-1068. In Sims, J.T. and A.N. Sharpley (eds.), Phosphorus, Agriculture and the Environment. Monograph no. 46, Amer. Society Agron., Crop Sci. Soc. Am., Soil Sci. Soc. Am., Madison, WI.
  6. Vadas, P.A., P.J.A. Kleinman, A.N. Sharpley and B.L. Turner. 2005. Relating soil phosphorus to dissolved phosphorus in runoff: A single extraction coefficient. J. Environ. Qual. 34: 572-580.
  7. Wolf, A.M., P.J.A. Kleinman, A.N. Sharpley and D.B. Beegle. 2005. Development of a water extractable phosphorus test for manures: An inter-laboratory study. Soil Sci. Soc. Am. J. 67: 695-700.


  1. Kleinman, P.J.A., A.N. Sharpley, T.L. Veith, R.O. Maguire and P.A. Vadas. 2004. Evaluation of phosphorus transport in surface runoff from packed soil boxes. J. Environ. Qual. 33: 1413-1423.
  2. Sharpley, A.N., R.W. McDowell and P.J.A. Kleinman. 2004. Soil Sci. Soc. Am. J. 68: Amounts, forms and solubility of phosphorus in soils receiving manure. Soil Sci. Soc. Am. J. 68: 2048-2057.
  3. Needleman, B.A., W.J. Gburek, G.W. Peterson, A.N. Sharpley and P.J.A. Kleinman. 2004. Surface runoff along two agricultural hillslopes with contrasting soils. Soil Sci. Soc. Am. J. 68: 914-923.
  4. Vadas, P.A., P.J.A. Kleinman and A.N. Sharpley. 2004. A simple method to predict dissolved phosphorus in runoff from surface applied manures. J. Environ. Qual. 33: 749-756.


  1. Kleinman, P.J.A. and A.N. Sharpley. 2003. Effect of broadcast manure on runoff phosphorus concentrations over successive rainfall events. J. Environ. Qual. 32.: 1072-1081.
  2. Kleinman, P.J.A., B.A. Needelman, A.N. Sharpley and R.W. McDowell. 2003. Using soil profile data to assess phosphorus leaching potential in manured soils. Soil Sci. Soc. Am. J. 67: 215-224.
  3. Sharpley, A.N. and P.J.A. Kleinman. 2003. Effect of rain simulator and plot scale on overland flow and phosphorus transport. J. Environ. Qual. 32: 2172-2179.
  4. Galbraith, J.M., P.J.A. Kleinman and R.B. Bryant. 2003. Sources of error affecting soil organic carbon estimates in northern New York. Soil Sci. Soc. Am. J. 67: 1206-1212.
  5. Sharpley, A.N., J.L. Weld, D.B. Beegle, P.J.A. Kleinman, W.J. Gburek, P.A. Moore, Jr. and G. Mullins. 2003. Development of phosphorus indices for nutrient management planning strategies in the United States. J. Soil Water Cons. 58: 137-152.


  1. Kleinman, P.J.A., A.N. Sharpley, A.M. Wolf, D.B. Beegle and P.A. Moore, Jr. 2002. Measuring water extractable phosphorus in manure as an indicator of phosphorus in runoff. Soil Sci. Soc. Am. J. 66: 2009-2015.
  2. Kleinman, P.J.A., A.N. Sharpley, B.G. Moyer and G.F. Elwinger. 2002. Effect of Mineral and Manure Phosphorus Sources on Runoff Phosphorus. J. Environ. Qual. 31: 2026-2033.
  3. Kleinman, P.J.A. and A.N. Sharpley. 2002. Estimating soil phosphorus sorption saturation from Mehlich-3 data. Commun. Soil Sci. Plant Anal. 32: 1825-1839.
  4. Callahan, M.P., P.J.A. Kleinman, A.N. Sharpley and W.L. Stout. 2002. Assessing the efficacy of alternative phosphorus sorbing soil amendments. Soil Sci. 167: 539-547.
  5. Maguire, R.O., A.C. Edwards, J.T. Sims, P.J.A. Kleinman and A.N. Sharpley. 2002. Effect of mixing soil aggregates on phosphorus concentration in surface waters. J. Environ. Qual. 31: 1294-1299.
  6. Sharpley, A.N., P.J.A. Kleinman, R.W. McDowell, M. Gitau and R.B. Bryant. 2002. Modeling phosphorus transport in agricultural watersheds: Processes and possibilities. J. Soil Water Cons. 57: 425-439.
  7. McDowell, R.W., A.N. Sharpley and P.J.A. Kleinman. 2002. Integrating phosphorus and nitrogen decision management at watershed scales. J. Am. Water Res. Assoc. 38: 479-491.


  1. Kleinman, P.J.A., A.N. Sharpley, K. Gartley, W.M. Jarrell, S. Kuo, R.G. Menon, R. Myers, K.R. Reddy, and E.O. Skogley. 2001. Interlaboratory comparison of soil phosphorus extraction methods. Communications in Soil Science and Plant Analysis 32: 2325-2345.
  2. Sharpley, A.N., R.W. McDowell, J.L. Weld and P.J.A. Kleinman. 2001. Assessing site vulnerability to phosphorus loss in an agricultural watershed. J. Environ. Qual. 30: 2026-2036.
  3. Sharpley, A.N., R.W. McDowell and P.J.A. Kleinman. 2001. Phosphorus loss from land to water: Integrating agricultural and environmental management. Plant and Soil 237: 287-307.
  4. Kleinman, P.J.A. and A.N. Sharpley. 2001. Eutrophication of lakes and rivers. Macmillan Encyclopedia of Life Sciences, Macmillan Press, London.


  1. Kleinman, P.J.A., R.B. Bryant, W.S. Reid, A.N. Sharpley and D. Pimentel. 2000. Using soil phosphorus behavior to identify environmental thresholds. Soil Science 165: 943-950.
  2. Sharpley, A.N., P.J.A. Kleinman and R. McDowell. 2000. Innovative management of agricultural phosphorus to protect soil and water resources. Communications in Soil Science and Plant Analysis: 32(7&8): 1071-1100.
  3. Kleinman, P.J.A., R.B. Bryant and W.S. Reid. 1999. Development of pedotransfer functions to quantify phosphorus saturation of agricultural soils. Journal of Environmental Quality 28: 2026-2030.
  4. Kleinman, P.J.A., R.B. Bryant and D. Pimentel. 1996. Assessing the ecological sustainability of slash-and-burn agriculture through soil fertility indicators. Agronomy Journal 88(2): 122-127.
  5. Kleinman, P.J.A., D. Pimentel and R.B. Bryant. 1995. The ecological sustainability of slash-and-burn. Agriculture, Ecosystems and Environment 54: 235-249.
  6. Pimentel, D., L. McLaughlin, A. Zepp, B. Lakitan, T. Kraus, P. Kleinman, F. Vancini, W.J. Roach, E. Grapp, W. Keaton and G. Selig. 1991. Environmental and economic impacts of reducing U.S. agricultural pesticide use. In, Pimentel, D. (ed.), Handbook of Pest Management in Agriculture, Vol. 1, 2nd Ed., CRC Press, Boca Raton, FL: 679-718. Reprinted, 1993. Agriculture, Ecosystems and Environment 46: 273-288.

Extension and proceedings

  1. Stedman, R.C., E.E. James and P.J. Kleinman. 2008. Local land uses and downstream benefits: How farmer attitudes influence watershed conservation practices. Rural New York Minute. Available online: (verified July 10, 2008).
  2. Weld, J., D. Beegle, R. Bryant, W. Gburek, P. Kleinman and A. Sharpley. 2007. The Pennsylvania phosphorus index: Version 2. Publications distribution center, Pennsylvania State University, University Park, PA.
  3. James, E., P. Kleinman and R. Stedman. 2005. Keep your cows out of streams and ponds. Hoard’s Dairyman (150): 472.
  4. Sharpley, A., T. Krogstad, R. McDowell and P. Kleinman. 2003. Phosphorus transport in riverine systems. In: Encyclopedia of Water Science, Marcel Dekker, New York, NY.
  5. Kleinman, P.J.A., R.B. Bryant, W.S. Reid and A.N. Sharpley. 2001. Phosphorus and agriculture VI: Identifying soil phosphorus thresholds for the New York Phosphorus Index. What’s Cropping Up? 11: 4-5.
  6. Kleinman, P.J.A. 2000. Source risk indicators of nutrient loss from agricultural lands. p. 237-252. In Sailus, M. (ed), Managing Nutrients and Pathogens in Animal Agriculture, Northeast Regional Agricultural Engineering Service, Ithaca, NY.
  7. Kleinman, P.J.A. 2000. Overview of phosphorus issues in the United States. Nebraska Agr. Exp. Sta. Bull.
  8. McDowell, R., A.N. Sharpley, W. Gburek and P.J.A. Kleinman. 2000. Hydrological and source management of pollutants at the soil profile scale. In Haygarth, P.M. and S.C. Jarvis (ed.s), Agriculture, Hydrology and Water Quality, CAB International, Oxon, UK.
  9. Sharpley, A.N., P.J.A. Kleinman, R.J. Wright, T. Daniel, B. Joern, R. Parry, and T. Sobecki. 2000. The National Phosphorus Project: Addressing the interface of agriculture and environmental phosphorus management. Volume on Farm Scale Research. In: Proceedings of the International Conference on Agricultural Effects on Ground and Surface Waters, Wageningen, The Netherlands. 11 pp.
  10. Bryant, R., S. Reid, P.J.A. Kleinman, A.N. Sharpley, K. Czymmek, B. Bellows, L. Geohring, T. Steenhuis, F. Gaffney, S. Bossard. Phosphorus in agriculture V: The New York P Index. What's Cropping Up? 10(3): 4-5
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  12. Kleinman, P.J.A., A.N. Sharpley, R.B. Bryant and W.S. Reid. 2000. Phosphorus in agriculture III: Factors affecting the potential for phosphorus loss from land to water. What’s Cropping Up? 10 (1): 4-5.
  13. Kleinman, P.J.A., R.B. Bryant, W.S. Reid and A.N. Sharpley. 1999. Phosphorus in agriculture II: Soil phosphorus chemistry. What's Cropping Up? 9 (5): 4-5.
  14. Kleinman, P. J.A., R. B. Bryant, W .S. Reid, and A. N. Sharpley. 1999. Phosphorus in agriculture I: Environmental underpinnings. What's Cropping Up? 9(4): 4-5.
  15. Sharpley, A. N., W. J. Gburek, and P. Kleinman. 1999. Phosphorus and nitrogen indices for site-specific environmental risk assessment. p. 1-15. In Murrell, S.(ed.) Nutrient Management Planning, Proceedings of Agricultural Information Conference 1999. Potash and Phosphate Institute, Brookings, SD.
  16. Sharpley, A. N., P. Kleinman, W. J. Gburek, and G. Folmar. 1999. Developing an integrated nutrient management approach for land applied manure at a watershed scale. p. 63-74. In Wood, G. (ed.) Manure Management. Saskatchewan Agriculture and Food, University of Saskatchewan, Saskatoon, Canada. 1999.
  17. Sharpley, A.N., T. Daniel, B. Wright, P. Kleinman, T. Sobecki, R. Parry and B. Joern. 1999. National research project to identify sources of agricultural phosphorus loss. Better Crops 83(4): 12-14.
  18. Pimentel, D., P.J.A. Kleinman, M. Pimentel and M. Held. 1998. Time, soil and water resources, and world food. Gaea. German translation, 1997. Bodenlos — zum nach-haltingen Umgang mit Boden. Politische Okologie 15: 7-11.
  19. Kleinman, P., C. Rogers, K. O'Neal, S. Keane, R. Wells and M. Conti. 1991. OECD Cooperative Risk Reduction Activities for Certain Dangerous Chemicals: Lead. U.S. Environmental Protection Agency, Office of Pollution Prevention and Toxics, Washington, DC.