Sharpley A N, Daniel T C, Edwards D R. Phosphorus movement in the landscape. Journal of Production Agriculture, 1993, 6(4): 492-500.
[2]
Pote D H, Daniel T C, Sharpley A N, et al. Relating extractable soil phosphorus to phosphorus losses in runoff. Soil Science Society of America, 1996, 60(3): 855-859.
[3]
Lemunyon J L, Gilbert R G. The concept and need for a phosphorus assessment tool. Journal of Production Agriculture, 1993, 6(4): 483-496.
[4]
Gburek W J, Sharpley A N, Heathwaite L, et al. Phosphorus management at the watershed scale: A modification of the phosphorus index. Journal of Environmental Quality, 2000, 29(1): 130-144.
[5]
Jokela W E, Magdoff F R, Durieux R P. Improved phosphorus recommendations using modified Morgan phosphorus and aluminum soil tests. Communication in Soil Science and Plant Analysis, 1998, 29(11-14): 1739-1749.
[6]
Jokela W E. Phosphorus index for Vermont: Background, rationale, and questions. Paper presented at Annual meeting of SERA-17 Minimizing P Loss from Agriculture. Quebec City, Canada, 1999.
[7]
Elliott H A, Brandt R C, Kleinman P J A, et al. Estimating source coefficients for phosphorus site indices. Journal of Environment Quality, 2006, 35(6): 2195-2201.
[8]
Moore P A, Daniel T C, Edwards D R. Reducing phosphorus runoff and inhibiting ammonia loss from poultry manure with aluminum sulfate. Journal of Environmental Quality, 2000, 29(1): 37-49.
[9]
Leytem A B, Sims J T, Coale F J. On-farm evaluation of a phosphorus site index for Delaware. Journal of Soil and Water Conservation, 2003, 58(2): 89-97.
[10]
Shober A L, Sims J T. Integrating phosphorus source and soil properties into risk assessments for phosphorus loss. Journal of Environment Quality, 2007, 71(2): 551-561.
[11]
Leinweber P, Meissner R, Eckhardt K U, et al. Management effects on forms of phosphorus in soil and leaching losses. European Journal of Soil Science, 1999, 50(3): 413-424.
[12]
Sharpley A N. Dependence of runoff phosphorus on extractable soil phosphorus. Journal of Environment Quality, 1995, 24(5): 920-926.
[13]
Uhlen G. Surface runoff losses of phosphorus and other nutrient elements from fertilized grassland. Norwegian Journal of Agricultural Sciences, 1989, 3(1): 47-55.
[14]
Bechmann M E, Krogstad T, Sharpley A N. A phosphorus index for Norway justification of factors. Paper presented at 7th IWA International Specialised Conference on Diffuse Pollution and Basin Management, Dublin, Ireland, 2003.
[15]
McFarland A L, Hauck J, White W, et al. Nutrient management using a phosphorus risk index for manure application fields. 1998//Manure management in harmony with the environment and society conference proceedings at Ames, IA SWCS. http://www.ctic.purdue.edu/ Core4/Nutrient/ManureMgmt/ Paper62.html.
[16]
Coale F J, Sim J T, Leytemc A B. Accelerated deployment of an agricultural nutrient management tool the Maryland phosphorus site index. Journal of Environmental Quality, 2002, 31(5): 1471-1476.
[17]
Klausner S. Nutrient management: Crop production and water quality. NY: Cornell Cooperative Extension,1995: 30-41
[18]
Klausner S, Flaherty D, Pacenka S. Working paper: Field phosphorus index tools for the NYC watershed agricultural program. NY: Cornell University, 1997: 38-40.
[19]
Johnes P J, Heathwaite A I. Modelling the impact of land use change on water quality in agricultural catchment. Hydrological Processes, 1997, 11(3): 269-286.
[20]
Gburek W J, Sharpley A N, Folmar G J. Modifying the P index to account for transport pathways. Report to the SERA Transport Workgroup. USDA-ARS, University Park, PA, 1998.
[21]
Sims J T, Simard R R, Joern B C. Phosphorus loss in agricultural drainage: historical perspective and current research. Journal of Environmental Quality, 1998, 27(2): 277-293.
Moss B, Johnes P, Phillips G. The monitoring of ecological quality and the classification of standing waters in temperate regions: A review based on a worked scheme for British waters. Biological Review, 1996, 71(2): 301-339.
[24]
Correll D L. The role of phosphorus in the eutrophication of receiving waters: A review. Journal of Environmental of Quality, 1998, 27(2): 261-266.
[25]
Daniel T C, Sharpley A N, Lemunyon J L. Agricultural phosphorus and eutrophication: A symposium overview. Journal of Environmental Quality, 1998, 27(2): 251-257.
Sharpley A N, McDowell R W, Weld J L, et al. Assessing site vulnerability to phosphorus loss in an agricultural watershed. Journal of Environmental Quality, 2001, 30 (6): 2026-2036 .
[28]
Coale F J. The Maryland Phosphorus Site Index Technical Users Guide.
[29]
Jokela W E. A phosphorus index for Vermont//NRAES. Managing nutrients and pathogens from agriculture: NRAES Cooperative Extension, 2000: 302-315
[30]
Birr A S, Mulla D J. Evaluation of phosphorus index in the watershed at the regional scale. Journal of Environmental Quality, 2001, 30(6): 2018-2025.
[31]
Lewandowski, Minnesota phosphorus site risk index technical guide.
[32]
Weld J L, Beegle D B, Gburek W J, et al. The Pennsylvania phosphorus index: version 1. Penn State College of Agricultural Sciences, Agricultural Research and Cooperative Extension Publication CAT UC180, University Park, Pennsylvania, 2003.
[33]
Baker J L, Laflen J M, Mallarino A, et al. Developing a phosphorus index using WEPP. Paper presented at International Symposium on Soil Erosion Research for the 21st Century, Honolulu, HI, 2001: 79-82 .
[34]
Renard K G, Foster G R, Weesies G A, et al. Predicting soil erosion by water: A guide to conservation planning with the revised universal soil loss equation (RULSE). Washington, DC: Government Printing Office, 1997: 312-315
[35]
DeLaune P B, Moore P A, Carman D K, et al. Development of a phosphorus index for pastures fertilized with poultry litter-factors affecting phosphorus runoff. Journal of Environment Quality, 2004, 33(6): 2183-2191.
[36]
USDA-NRCS. Phosphorus index for Alabama: A planning tool to assess and manage P movement, 2001.
Beaudet P, Beaulieu R, Bélanger M, et al. Proposition denorme surla fertilisation phosphatée au groupe de travail interministériel. Paper presented at Groupe technique surla norme sur le phosphore. Ministère de l' Environnement duQuébec, Québec, QC, 1998.
[39]
KogelamnWJ, Lin H S, Bryant R B, et al. A statewide assessment of impacts of phosphorus-index implementation in Pennsylvania. Journal of Soil and Water Conservation, 2004, 59(1): 9-18.
[40]
U.S. Department of Agriculture-Natural Resource Conservation Service. The Florida phosphorus index. Florida Agronomy Field Handbook, Chapter 1, Exhibit 9. Gainesville, Florida USA. 2000. http://www.fl.nrcs.usda. gov/flgeneral/pifinal.pdf.
[41]
Andersen H E, Kronvang B. Modifying and evaluating a P index for Denmark. Water Air and Soil Pollution, 2006, 174(1-4): 341-353.
[42]
Mallarino A P, Stewart B M, Baker J L, et al Phosphorus indexing for cropland: Overview and basic concepts of the Iowa phosphorus index. Journal of Soil and Water Conservation,2002, 57(6): 440-447.
[43]
Bundy L G, Ward G L. The Wisconsin Phosphorus Index. 2006. http://wpindex.soils.wisc.edu/index.php
[44]
Wolfe M L, Pease J, Zelazny L, et al. Phosphorus index, version 2.0. technical guide. Virginia Tech Blacksburg, VA 24061, Revised October 2005,
[45]
Johansson R C, Randall J R. Incorporating economics into the phosphorus index: An application to U. S. Watersheds. Journal of Soil and Water Conservation, 2003, 58 (5): 224-231.
[46]
Czymmek K J, Ketterings Q M, Geohring L. Phosphorus and agriculture VII: The new phosphorus index for New York State. What's cropping up? 2001, 11(4): 1-3.
[47]
Czymmek K J, Ketterings Q M, Geohring L D. The New York phosphorus runoff index: User's manual and documentation, 2003. http://nmsp.cals.cornell.edu/publications/ extension/PI_User_Manual.pdf.
[48]
Sharpley A. N, Weld J L, Beegle D B, et al. Development of phosphorus indices for nutrient management planning strategies in the United States. Journal of Soil and Water Conservation, 2003, 58(3): 137-152.
[49]
Magette W L. Factors affecting losses of nutrients from agricultural systems and delivery to water resources// Carton O T. Draft Guidelines for Nutrient Use in Intensive Agricultural Enterprises. Teagasc, Johnstown Castle Research and Development Centre, Wexford, Ireland, 1998: 6-31.
[50]
Hughes K J, Magette W L, Kurz I. Calibration of the Magette phosphorus ranking scheme: A risk assessment tool for Ireland. Paper presented at 7th IWA International Specialised Conference on Diffuse Pollution and Basin Management, Dublin, Ireland, 2003.
[51]
Heathwaite L, Fraser A I, Johnes P J, et al. The Phosphorus indicators tool: a simple model of diffuse P loss from agricultural land to water. Soil Use and Manage, 2003, 19(1): 1-11.
[52]
Heathwaite A L, Sharpley A, Bechmann M. The conceptual basis for a decision support framework to assess the risk of phosphorus loss at the field scale across Europe. Journal of Plant Nutrition and Soil Science, 2003, 166 (4): 447-458.
[53]
Beaulieu L, Gallichand J, Duchemin M, et al. Sensitivity analysis of a phosphorus index for Québec. Canadian Biosystems Engineering/Le génie des biosystèmes au Canada, 2006, 48(1): 13-24.
[54]
Djidic F, Bergstr?m L. Conditional phosphorus index as an educational tool for risk assessment and phosphorus management. Ambio, 2005, 34(4): 296-300.
[55]
Bechmann M, Krogstad T, Sharpley A N. A phosphorus index for Norway. Acta Agriculturae Scandinavica, Section B Soil and Plant Science, 2005, 55(3): 205-213.
[56]
Bechmann M E, St?lnacke Per, Kv?rn? S H. Testing the Norwegian phosphorus index at the field and subcatchment scale. Agriculture Ecosystems Environment, 2007,120(2-4): 117-128.
[57]
DeLaune P B, Moore P A, Carman Jr. D K, et al. Evaluation of the phosphorus source component in the phosphorus index for pastures. Journal of Environmental Quality, 2004, 33(6): 2192-2200.
[58]
Sharpley A N. Identifying sites vulnerable to phosphorus loss in agricultural runoff. Journal of Environmental- Quality, 1995, 24(6): 947-951.
[59]
Veith T L, Sharpley A N, Weld J L, et al. Comparison of measured and simulated phosphorus losses with indexed site vulnerability. Transactions of the American Society of Agricultural Engineers, 2005, 48(2): 557-565.
[60]
Magette W L. Identifying diffuse pollution sources using multicriteria analysis. Paper presented at 2002 ASAE Annual International Meeting. Chicago, Illinois, 2002.
[61]
Hughes K J, Magette W L, Kurz I. Identifying critical source areas for phosphorus loss in Ireland using field and catchment scale ranking schemes. Journal of Hydrology, 2005, 304(1-4): 430-445.
Heathwaite A L, Sharpley A N, Gburek W J. A conceptual approach for integrating phosphorus and nitrogen management at watershed scales. Journal of Environment Quality, 2000, 29(1): 158-166.
