The impact of hybrid dairy systems on air, soil and water quality: Focus on nitrogen and phosphorus cycling

Environmental Impacts of Pasture-Based Farming

Volumn , Issue , 2008, Pages 249-276

  Kleinman, Peter J A ^a   Soder, Kathy ^a  

^a AGRICULTURAL RESEARCH SERVICE   (United States)

Author keywords

[No Author keywords available]

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EID: 79952929673     PISSN: None     EISSN: None     Source Type: Book    
DOI: None     Document Type: Chapter

References (123)

1. Aarons, S.R., Melland, A.R. and Gourley, C.J.P. (2004) Nutrient distribution within a dairy farm. Third Australian New Zealand Soil Conference, SuperSoil 2004. Available at: http://www.regional.org.au/au/asssi/super soil2004/s16/oral/1622_aaronss.htm
2. Aharoni, Y., Arieli, A. and Tagari, H. (1993) Lactational response of dairy cows to change of degradability of dietary protein and organic matter. Journal of Dairy Science 76, 3514-3522.
3. Aldrich, J.M., Muller, L.D. and Varga, G.A. (1993) Nonstructural carbohydrates and protein effects on rumen fermentation, nutrient flow, and performance of dairy cows. Journal of Dairy Science 76, 1091-1105.
4. Bacon, S.C., Lanyon, L.E. and Schlauder, R.M. Jr. (1990) Plant nutrient flow in the managed pathways of an intensive dairy farm. Journal of Agronomy 82, 755-761.
5. Ball, R., Keeney, D.R., Theobald, P.W. and Nes, P. (1979) Nitrogen balance in urine-affected areas of a New Zealand pasture. Agronomy Journal 71, 309-314.
6. Bargo, F., Muller, L.D., Delahoy, J. and Cassidy, T. (2002) Performance of high producing dairy cows with three different feeding systems combining pasture and total mixed rations. Journal of Dairy Science 85, 2948-2963.
7. Bargo, F., Muller, L.D., Kolver, E.S. and Delahoy, J.E. (2003) Invited review: production and digestion of supplemented dairy cows on pasture. Journal of Dairy Science 86, 1-42.
8. Beever, D.E., Losada, H.R., Cammell, S.B., Evans, R.T. and Haines, M.J. (1986) Effect of forage species and season on nutrient digestion and supply in grazing cattle. British Journal of Nutrition 56, 209-225.
9. Bicudo, J.R., Schmidt, D.R. and Jacobson, L.D. (2004) Using covers to minimize odors and gas emissions from manure storage. University of Kentucky Cooperative Extension Bulletin AEN 84. Available at: http://www. ca.uky.edu/agc/pubs/aen/aen84/aen84.pdf
10. Bittman, S., van Vliet, L.J.P., Kowalenko, C.G., McGinn, S., Lau, A.K., Patini, M., Forge, T., McLaughlin, N.B., Hunt, D.E., Bounaix, F. and Friesen, A. (2003) A low disturbance technique for applying slurry on forage land. In: Controlling N Flows and Losses. Proceedings of Grassland and Environmental Research (IGER) Nitrogen Workshop. Academic Press, Wageningen, the Netherlands, pp. 490-492.
11. Bouldin, D.R. and Klausner, S.D. (1998) Managing nutrients in manure: general principles and applications to dairy manure in New York. In: Hatfield, J.L. and Stewart, B.A. (eds) Animal Waste Utilization: Effective Use of Manure as a Soil Resource. Ann Arbor Press, Chelsea, Michigan, pp. 65-88.
12. Braskerud, B. (2002) Factors affecting phosphorus retention in small constructed wetlands treating agricultural non-point source pollution. Ecological Engineering 19, 41-61.
13. Broderick, G.A. (2003) Effects of varying dietary protein and energy levels on the production of lactating dairy cows. Journal of Dairy Science 86, 1370-1381.
14. Brown, M.P., Longabucco, P., Rafferty, M.R., Robillard, P.D. and Walter, M.F. (1989) Effects of animal waste control practices on nonpointsource phosphorus loading in the West Branch of the Delaware River watershed. Journal of Soil and Water Conservation 44, 67-70.
15. Bussink, D.W. (1992) Ammonia volatilization from grassland receiving nitrogen fertilizer and rotationally grazed by dairy cattle. Fertilizer Research 33, 257-265.
16. Bussink, D.W. and Oenema, O. (1998) Ammonia volatilization from dairy farming systems in temperate areas: a review. Nutrient Cycling in Agroecosystems 51, 19-33.
17. Clancy, K. (2006) Greener Pastures: How Grassfed Beef and Milk Contribute to Healthy Eating. Union of Concerned Scientists, Cambridge, Massachusetts.
18. Coppock, C.E., Bath, D.L. and Harris, B. Jr. (1981) From feeding to feeding systems. Journal of Dairy Science 64, 1230.
19. Cunningham, L.C. (1993) An economic comparison of grazing intensity for lactating dairy cattle in northeastern Pennsylvania. MS thesis, The Pennsylvania State University, University Park, Pennsylvania.
20. Dartt, B.A., Lloyd, J.W., Radke, B.R., Black, J.R. and Kaneene, J.B. (1999) A comparison of profitability and economic efficiencies between management intensive grazing and conventionally managed dairies in Michigan. Journal of Dairy Science 82, 2412-2420.
21. Daverede, I.C., Kravchenko, A.N., Hoeft, R.G., Nafziger, E.D., Bullock, D.G., Warren, J.J. and Gonzini, L.C. (2004) Phosphorus runoff from incorporated and surface-applied liquid swine manure and phosphorus fertilizer. Journal of Environmental Quality 33, 1535-1544.
22. Day, D.L. and Funk, T.L. (1998) Processing manure: physical, chemical and biological treatment. In: Hatfield, J.L. and Stewart B.A. (eds) Animal Waste Utilization: Effective Use of Manure as a Soil Resource. Ann Arbor Press, Chelsea, Michigan, pp. 243-282.
23. Di, H.J. and Cameron, K.C. (2000) Nitrate leaching in temperate agroecosystems: sources, factors and mitigating strategies. Nutrient Cycling in Agroecosystems 46, 237-256.
24. Di, H.J. and Cameron, K.C. (2002) The use of a nitrification inhibitor, dicyandiamide (DCD), to reduce nitrate leaching and nitrous oxide emissions in a simulated grazed and irrigated grassland. Soil Use and Management 18, 395-403.
25. Di, H.J. and Cameron, K.C. (2004) Effects of temperature and application rate of a nitrification inhibitor, dicyandiamide (DCD), on nitrification rate and microbial biomass in a grazed pasture soil. Australian Journal of Soil Research 42, 927-932.
26. Dou, Z., Knowlton, K.F., Kohn, R.A., Wu, Z., Satter, L.D., Zhang, G., Toth, J.D. and Ferguson, J.D. (2002) Phosphorus characteristics of dairy feces affected by diets. Journal of Environmental Quality 31, 2058-2065.
27. Dou, Z., Ferguson, J.D., Fiorini, J., Toth, J.D., Alexander, S.M., Peterson, A.B., Sims, J.T. and Wu, Z. (2003) Phosphorus feeding levels and critical control points on dairy farms. Journal of Dairy Science 86, 3787-3795.
28. Dougherty, W.J., Fleming, N.K., Cox, J.W. and Chittleborough, D.J. (2004) Phosphorus transfer in surface runoff from intensive pasture systems at various scales: a review. Journal of Environmental Quality 33, 1973-1988.
29. Edwards, P. (1980) A review of recycling organic wastes into fish, with emphasis on the tropics. Aquaculture 21, 261-279.
30. Elbehri, A. and Ford, S.A. (1995) Economic analysis of major dairy forage systems in Pennsylvania: the role of intensive grazing. Journal of Production Agriculture 8, 501-506.
31. Emmick, D.L. and Toomer, L.F. (1991) The economic impact of intensive grazing management on fifteen dairy farms in New York State. In: Proceeding of Forage and Grassland Conference. American Forage and Grassland Council, Georgetown, Texas, p. 19
32. Fales, S.L., McMurry, S.A. and McSweeny, W.T. (1993) The role of pasture in Northeastern dairy farming: historical perspectives, trends and research imperatives for the future. Agricultural Research 677, 111-132.
33. Fraser, M., Cameron, K.C. and Sherlock, R.R. (1994) Lysimeter study of the fate of nitrogen in animal urine returns to irrigated pasture. European Journal of Soil Science, 45, 439-447.
34. Fulhage, C.D. (1997) Manure management consideration for expanding dairy herds. Journal of Dairy Science 80, 1872-1879.
35. Gassman, P.W. and Bouzaher, A. (1995) Livestock pollution: lessons from the European Union. In: Steele, K. (ed.) Animal Waste and the Land Water Interface. Lewis Publishers-CRC, New York, pp. 515-522.
36. Ghebremichael, L.T., Cerosaletti, P.E., Veith, T.L., Hamlett, J.M. and Gburek, W. (2007) Economic and phosphorus-related effects of precision feeding and forage management at a farm-scale. Journal of Dairy Science 90(8), 3700-3715.
37. Gloy, B.A., Tauer, L.W. and Knoblauch, W. (2002) Profitability of grazing versus mechanical forage harvesting on New York dairy farms. Journal of Dairy Science 85, 2215-2222.
38. Goff, J.P. (1998) Phosphorus deficiency. In: Howard, J.L. and Smith, R.A. (eds) Current Veterinary Therapy 4: Food Animal Practice. W.B. Saunders, Philadelphia, Pennsylvania, pp. 218-220.
39. Goss, M.J. and Goorahoo, D. (1995) Nitrate contamination of groundwater: measurement and prediction. Fertilizer Research 42, 331-338.
40. Granstedt, A. (1997) Experiences from long term studies in Nordic countries to understanding the conversion process and development of organic farms. In: Proc. 2nd International Workshop of the European Network for Scientific Research Co-ordination in Organic Farming (ENOF). Steps in the Conversion and Development of Organic Farms. 3-4 October, 1996, Barcelona.
41. Hamilton, C.M. and Sims, J.T. (1995) Nitrogen and phosphorus availability in enriched, pelletized poultry litters. Journal of Sustainable Agriculture 5, 115-132.
42. Hanson, G.D., Cunningham, L.C., Morehart, M.J. and Parsons, R.L. (1998) Profitability of moderate intensive grazing of dairy cows in the Northeast. Journal of Dairy Science 81, 821-829.
43. Harris, B.L. and Kolver, E.S. (2001) Review of Holsteinization on intensive pastoral dairy farming in New Zealand. Journal of Dairy Science 84(E. Suppl.), E56-E61.
44. Haygarth, P.M., Chapman, P.J., Jarvis, S.C. and Smith, R.V. (1998) Phosphorus budgets for two contrasting grassland farming systems in the UK. Soil Use and Management 14, 160-167.
45. Herrera-Saldana, R., Gomez-Alarcon, R., Torabi, M. and Huber, J.T. (1990) Influence of synchronizing protein and starch degradation in the rumen on nutrient utilization and microbial synthesis. Journal of Dairy Science 73, 142-148.
46. Hively, W.D., Bryant, R.B. and Fahey, T.J. (2005) Phosphorus concentrations in overland flow from diverse locations on a New York dairy farm. Journal of Environmental Quality 34, 1224-1233.
47. Hunt, P.G., Matheny, T.A. and Szögi, A.A. (2003) Denitrification in constructed wetlands used for treatment of swine wastewater. Journal of Environmental Quality 32, 727-735.
48. James, E., Kleinman, P., Veith, T., Stedman, R. and Sharpley, A. (2007) Phosphorus contributions from pastured dairy cattle to streams of the Cannonsville Watershed, New York. Journal of Soil and Water Conservation 62, 40-47.
49. Jeppsson, K.H. (1999) Volatilization of ammonia in deep-litter systems with different bedding materials for young cattle. Journal of Agricultural Engineering Research 73, 49-57.
50. Kim, Y.J., Geohring, L.D., Jeon, J.H., Collick, A.S., Giri, S.K. and Steenhuis, T.S. (2006) Evaluation of the effectiveness of vegetative filter strips for phosphorus removal with the use of a tracer. Journal of Soil and Water Conservation 61, 293-302.
51. Kleinman, P.J.A. and Sharpley, A.N. (2003) Effect of broadcast manure on runoff phosphorus concentration over successive rainfall events. Journal of Environmental Quality 32, 1072-1081.
52. Knowlton, K.F. and Herbein, J.H. (2002) Phosphorus partitioning during early lactation in dairy cows fed diets varying in phosphorus content. Journal of Dairy Science 85, 1227-1236.
53. Kolver, E.S. (2003) Nutritional limitations to increased production on pasture-based systems. Proceedings of the Nutrition Society 62, 291-300.
54. Kolver, E.S., Muller, L.D., Varga, G.A. and Cassidy, T.W. (1998) Synchronization of ruminal degradation of supplemental carbohydrate with pasture nitrogen in lactating dairy cows. Journal of Dairy Science 81, 2017-2028.
55. Kolver, E.S., Napper, A.J., Copeman, P.J.A. and Muller, L.D. (2000) A comparison of New Zealand and overseas Holstein Friesian heifers. Proceedings of the New Zealand Society of Animal Production 60, 265-269.
56. Kriegl, T. and McNair, R. (2005) Pastures of plenty: financial performance of Wisconsin grazing dairy farms. University of Wisconsin, Madison, Wisconsin.
57. Krober, T.F., Kulling, D.R., Menzi, H., Sutter, F. and Kreuzer, M. (2000) Quantitative effects of feed protein reduction and methionine on nitrogen use by cows and nitrogen emission from slurry. Journal of Dairy Science 83, 2941-2951.
58. Lazarus, W.E. and Rudstrom, M. (2007) The economics of anaerobic digester operation on a Minnesota dairy farm. Review of Agricultural Economics 29, 349-364.
59. Majer Newman, J. and Clausen, J.C. (1997) Seasonal effectiveness of a constructed wetland for processing milkhouse wastewater. Wetlands 17, 375-382.
60. McDowell, R.W. (2006) Phosphorus and sediment loss in a catchment with winter forage grazing of cropland by dairy cattle. Journal of Environmental Quality 35, 575-583.
61. McDowell, R. and Sharpley, A. (2002) Phosphorus transport in overland flow in response to position of manure application. Journal of Environmental Quality 31, 217-227.
62. McDowell, R.W. and Wilcock, R.J. (2007) Sources of sediment and phosphorus in stream flow of a highly productive dairy farmed catchment. Journal of Environmental Quality 36, 540-548.
63. McDowell, R.W., Nash, D.M. and Robertson, F. (2007) Sources of phosphorus lost from a grazed pasture receiving simulated rainfall. Journal of Environmental Quality 36, 1281-1288.
64. Meals, D. (2000) Lake Champlain Basin Agricultural Watersheds Section 319 National Monitoring Program Project Executive Summary. Vermont Department of Environmental Conservation, Waterbury, Vermont.
65. Meals, D.W. (1993) Assessing nonpoint phosphorus control in the LaPlatte river watershed. Lake Reservoir Management 7, 197-207.
66. Moore, P.A. Jr., Formica, S.J., Van Epps, M. and Delaune, P.B. (2005) Effect of pasture renovation on nutrient runoff from pastures fertilized with manure. In: Proceedings of the 7th International Symposium on Livestock Environment. American Society of Agricultural Engineers, 18-20 May 2005, Beijing, China, p. 301.
67. Moreira, V.R. and Satter, L.D. (2006) Effect of scraping frequency in a freestall barn on volatile nitrogen loss from dairy manure. Journal of Dairy Science 89, 2579-2587.
68. Morken, J. and Sakshaug, S. (1997) New injection technique - Direct ground injection (DGI ). In: Voermans, J.A.M. and Monteny, G.A. (eds) Proceedings of the International Symposium on Ammonia and Odour Control from Animal Production Facilities, 6-10 October. Research Institute for Pig Husbandry, Rosmalen, the Netherlands, pp. 585-590.
69. Morken, J. and Sakshaug, S. (1998) Direct ground injection of livestock waste slurry to avoid ammonia emission. Nutrient Cycling in Ecosystems 51, 59-63.
70. Mueller, D.H., Wendt, R.C. and Daniel, T.C. (1984) Phosphorus losses as affected by tillage and manure application. Soil Science Society of America Journal 48, 901-905.
71. Muller, L.D. (1990) Individual concentrate feeding and total mixed rations in meeting nutritional needs of dairy cows. Proceedings from Dairy Feeding Systems Symposium. Northeast Regional Agricultural Engineering Service, Ithaca, New York, pp. 113-117.
72. Muller, L.D. (1992) Feeding management strategies. In: Van Horn, H.H. and Wilcox, C.J. (eds) Large Dairy Herd Management. Management Services, American Dairy Science Association, Champaign, Illinois, pp. 326-335.
73. Neeteson, J.J., Schroder, J.J. and Hassingk, J. (2001) The Netherlands. In: DeClerq, P. et al. (eds) Nutrient Management Legislation in European Countries. Wageningen Pers., Wageningen, the Netherlands, pp. 283-293.
74. National Research Council. (2001) Nutrient Requirements of Dairy Cattle, 7th rev. edn. National Academy of Sciences, Washington, DC.
75. Oenema, O., Bannink, A., Sommer, S.G. and Velthof, G.L. (2001) Gaseous nitrogen emissions from livestock farming systems. In: Follett, R.F. and Hatfield, J.L. (eds) Nitrogen in the Environment: Sources, Problems and Management. Elsevier Science, Amsterdam, pp. 255-289.
76. Osei, E., Gassman, P.W., Jones, R.D., Pratt, S.J., Hauck, L.M., Beran, L.J., Rosenthal, W.D. and Williams, J.R. (2000) Economic and environmental impacts of alternative practices on dairy farms in an agricultural watershed. Journal of Soil and Water Conservation 55, 466-472.
77. Parker, W.J., Muller, L.D., Fales, S.L. and McSweeney, W.T. (1991) A physical and financial comparison of dairy farming in Pennsylvania and New Zealand. Staff paper 195, Department of Agricultural Economy and Rural Sociology, Pennsylvania State University, University Park, Pennsylvania. Parker, W.J., Muller, L.D. and Buckmaster, D.R. (1992) Management and economic implications of intensive grazing on dairy farms in the Northeastern States. Journal of Dairy Science 75, 2587-2597.
78. Parker, W.J., Muller, A., Fales, S.L. and McSweeney, W.T. (1993) A survey of dairy farms in Pennsylvania using minimal or intensive grazing systems. Professional Animal Scientist 9, 77-85.
79. Peterson, P.R. and Gerrish, J.R. (1996) Grazing systems and spatial distribution of nutrients in pastures: livestock management considerations. In: Joost, R.E. and Roberts, C.A. (eds) Nutrient Cycling in Forage Systems. Proceedings of Potash and Phosphate Institute and the Foundation for Agronomy Research, Columbia, Missouri. 7-9 March. PPI, Norcross, Georgia, pp. 203-212.
80. Petersen, S.O., Lind, A.M. and Sommer, S.G. (1998) Nitrogen and organic matter losses during storage of cattle and pig manure. Journal of Agricultural Science 130, 69-79.
81. Powell, J.M., Satter, L.D. and Misselbrook, T.A. (2004) Dairy manure and air quality: the issues. Available at: http://ipcm.wisc.edu/ Publications/tabid/54/Default.aspx Preedy, N., McTiernan, K., Mathews, R., Heathwaite, L. and Haygarth, P. (2001) Rapid incidental phosphorus transfers from grassland. Journal of Environmental Quality 30, 2105-2112.
82. Rauniyar, G.P. and Parker, W.J. (1999) Longitudinal analysis of dairy farm income and expenditure in New Zealand: a review of 25 years of adjustment. Australasian Agribusiness Review, vol. 7. Available at: http://www.agrifood.info/review/1999/ Rauniyar.html
83. Rook, A.J., Tallowin, J.R.B., Rutter, S.M., Orr, R.J., Hopkins, A. and Gibb, M.J. (2005) Behavioural and community ecology: mechanisms driving biodiversity in pasture-based systems. In: Rook, A.J. and Penning, P.D. (eds) In Grazing Management, the Principles and Practice of Grazing, for Profit and Environmental Gain, Within Temperate Grassland Systems. British Grassland Society, Reading, UK, pp. 54-65.
84. Rotz, C.A. (2004) Management to reduce nitrogen losses in animal production. Journal of Animal Science 82(E. Suppl.), E119-E137.
85. Rotz, C.A., Sharpley, A.N., Satter, L.D., Gburek, W.J. and Sanderson, M.A. (2002) Production and feeding strategies for phosphorus management on dairy farms. Journal of Dairy Science 85, 3153.
86. Saporito, L.S. and Lanyon, L.E. (1998) Evaluating management and soil and weather contributions to potential nitrate leaching from a Pennsylvania dairy farm using NLEAP. Journal of Environment Quality 27, 1367-1375.
87. Schellinger, G.R. and Clausen, J.C. (1992) Vegetative filter treatment of dairy barnyard runoff in cold regions. Journal of Environmental Quality 21, 40-45.
88. Schmit, T.M., Boisvert, R.N. and Tauer, L.W. (2001) Measuring the financial risks of New York dairy producers. Journal of Dairy Science 84, 411-420.
89. Schwer, C.B. and Clausen, J.C. (1989) Vegetative filter treatment of dairy milkhouse waste water. Journal of Environmental Quality 18, 446-451.
90. Serodes, J.B. and Normand, D. (1999) Phosphorus removal in agricultural wastewater by a recently constructed wetland. Canadian Journal of Civil Engineering 26, 305-311.
91. Shamir, E., Thompson, T.L., Karpiscak, M.M., Freitas, R.J. and Zauderer, J. (2001) Nitrogen accumulation in a constructed wetland for dairy wastewater treatment. Journal of the American Water Resources Association 37, 315-325.
92. Sharpley, A.N. (1985) Depth of surface soilrunoff interaction as affected by rainfall, soil slope and management. Soil Science Society of America Journal 49, 1010-1015.
93. Sharpley, A.N. and Halvorson, A.D. (1994) The management of soil phosphorus availability and its impact on surface water quality. In: Lal, R. and Stewart, B.A. (eds) Soil Processes and Water Quality. Lewis Publishers, Boca Raton, Florida, pp. 7-90.
94. Sharpley, A.N. and Syers, J.K. (1976) Phosphorus transport in surface runoff as influenced by fertilizer and grazing cattle. New Zealand Journal of Science 19, 277-282.
95. Sharpley, A.N. and Syers, J.K. (1979) Loss of nitrogen and phosphorus in tile drainage as influenced by nitrogen fertilizer application and grazing animals. New Zealand Journal of Agricultural Research 22, 123-217.
96. Silva, R.G., Cameron, K.C., Di, H.J. and Hendry, T. (1999) A lysimeter study of the impact of cow urine, dairy shed effluent and nitrogen fertiliser on nitrate leaching. Australian Journal of Soil Research 37, 357-369.
97. Smith, S.F. (1994) Moderate size farms can be successful. In: Agricultural Update: Farm Business and Financial Management. Vol. 4, No. 4. Cornell Cooperative Extension, Ithaca, New York, p. 2
98. Smith, K.A., Chalmers, A.G., Chambers, B.J. and Christie, P. (1998) Organic manure phosphorus accumulation, mobility and management. Soil Use and Management 14, 154-159.
99. Smith, E., Gordon, R., Madani, A. and Stratton, G. (2006) Year-round treatment of dairy wastewater by constructed wetlands in Atlantic Canada. Wetlands 26, 349-357.
100. Soder, K.J. and Rotz, C.A. (2001) Economic and environmental impact of four levels of concentrate supplementation in grazing dairy herds. Journal of Dairy Science 84, 2560-2572.
101. Soder, K.J. and Rotz, C.A. (2003) Economic and environmental impact of utilizing a total mixed ration in Pennsylvania grazing dairy herds. Professional Animal Scientist 19, 304-311.
102. Soder, K.J. and Muller, L.D. (2007) Case study: a survey of total mixed ration use on grazing dairy farms in Pennsylvania and New York. Professional Animal Scientist 23, 300-307.
103. Soriano, F.D., Polan, C.E. and Miller, C.N. (2001) Supplementing pasture to lactating Holsteins fed a total mixed ration diet. Journal of Dairy Science 84, 2460-2468.
104. Stout, W.L. (2003) Effect of urine volume on nitrate leaching in the northeast USA. Nutrient Cycling in Agroecosystems 67, 197-203.
105. Stout, W.L., Fales, S.L., Muller, L.D., Schnabel, R.R., Elwinger, G.F. and Weaver, S.R. (2000) Assessing the effect of management intensive grazing on water quality in the northeast USA. Journal of Soil and Water Conservation 55, 238-243.
106. Tallam, S.K., Ealy, A.D. Bryan, K.A. and Wu, Z. (2005) Ovarian activity and reproductive performance of dairy cows fed different amounts of phosphorus. Journal of Dairy Science 88, 3609-3618.
107. Tallowin, J.R.B., Rook, A.J. and Rutter, S.M. (2005) Impact of grazing management on biodiversity of grasslands. Animal Science 81, 193-198. Texas Water Resources Institute. (2006) Dairy compost utilization by the public and public entities. Available at: http://compost.tamu. edu/index.php
108. Tozer, P.R., Bargo, F. and Muller, L.D. (2003) Economic analyses of feeding systems combining pasture and total mixed ration. Journal of Dairy Science 86, 808-818.
109. Tucker, W.B., Rude, B.J. and Wittayakun, S. (2001) Case Study: performance and economics of dairy cows fed a corn silage-based total mixed ration or grazing annual ryegrass during mid to late lactation. Professional Animal Scientist 17, 195-201.
110. Uusi-Kamppa, J., Braskerud, B., Jansson, H., Syversen, N. and Uusitalo, R. (2000) Buffer zones and constructed wetlands as filters for agricultural phosphorus. Journal of Environmental Quality 29, 151-158.
111. Vadas, P.A., Harmel, R.D. and Kleinman, P.J.A. (2007) Transformations of soil and manure phosphorus after surface application of manure to field plots. Nutrient Cycling in Agroecosystems 77, 83-99.
112. Van Vuuren, A.M., Tamminga, S. and Ketelaar, R.S. (1991) In sacco degradation of organic matter and crude protein of fresh grass (Lolium perenne) in the rumen of grazing dairy cows. Journal of Agricultural Science Cambridge 116, 429-436.
113. Vietor, D.M., Griffith, E.N., White, R.H., Provin, T.L., Muir, J.P. and Read, J.C. (2002) Export of manure phosphorus and nitrogen in turfgrass sod. Journal of Environmental Quality 31, 1731-1738.
114. Watson, C.A., Bengtsson, H., Ebbesvik, M., Loes, A.K., Myrbeck, A., Salomon, E., Schroder, J. and Stockdale, E.A. (2002) A review of farmlevel nutrient balances for organic farms as a tool for management of soil fertility. Soil Use and Management 18, 264-273.
115. Webb, J. (2001) Estimating the potential for ammonia emissions from livestock extreta and manures. Environmental Policy 111, 395-406.
116. White, S.L. (2000) Investigation of Pasture and Confinement Dairy Feeding Systems Using Jersey and Holstein Cattle. North Carolina State University, Raleigh, North Carolina. White, S.L., Sheffield, R.E., Washburn, S.P., King, L.D. and Green, J.T., Jr. (2001) Spatial and time distribution of dairy cattle excreta in an intensive pasture system. Journal of Environmental Quality 30, 2180-2187.
117. Whitehead, D.C. and Bristow, A.W. (1990) Transformations of nitrogen following the application of 15N-labelled cattle urine to an established grass sward. Journal of Applied Ecology 27, 667-678.
118. Withers, P.J.A., Peel, S., Mansbridge, R.J., Chalmers, A.G. and Lane, S.P. (1999) Transfers of phosphorus within three dairy farming systems receiving varying inputs in feeds and fertilizers. Nutrient Cycling in Agroecosystems 55, 63-75.
119. Wright, P. (1996) Prevention, collection and treatment of concentrated pollutions sources on farms. In: Animal Agriculture and the Environment: Nutrients, Pathogens and Community Relations. Northeast Regional Agricultural Engineering Service, Ithaca, New York, pp. 142-158.
120. Wu, Z. and Satter, L.D. (2000) Milk production and reproductive performance of dairy cows fed two concentrations of phosphorus for two years. Journal of Dairy Science 83, 1063.
121. Wu, Z., Satter, L.D. and Sojo, R. (2000) Milk production, reproductive performance, and fecal excretion of phosphorus by dairy cows fed three amounts of phosphorus. Journal of Dairy Science 83, 1028-1041.
122. Wulf, S., Maeting, M. and Clemens, J. (2002) Application technique and slurry co-fermentation effects on ammonia, nitrous oxide and methane emissions after spreading: I. Ammonia volatilization. Journal of Environmental Quality 31, 1789-1794.
123. Xue, Y., Kovacic, D.A., David, M.B., Gentry, L.E., Mulvaney, R.L. and Lindau, C.W. (1999) In situ measurement of denitrification in constructed wetlands. Journal of Environmental Quality 28, 263-269.