@book {6778,
	title = {Farming, Fertilizers, and the Nitrate Problem},
	year = {1991},
	month = {1991},
	publisher = {C-A-B International},
	organization = {C-A-B International},
	address = {United Kingdom},
	author = {Addiscott, T. M. //Whitemore, A. P. //Powlson, D. S.}
}
@article {6810,
	title = {Manure: Something New to Swear By},
	journal = {Science News},
	volume = {Vol. 103},
	year = {1973},
	month = {1973},
	pages = {pp. 314-315.},
	author = {Arehart-Treichel, Joan}
}
@article {6802,
	title = {Changes in Soil Properties and Ensymatic Activities following Manure Applications to a Rangeland},
	journal = {Rangeland Ecology and Management},
	volume = {Vol. 59},
	year = {2006},
	month = {2006},
	pages = {pp. 314-320.},
	author = {Bell, Joudan M. Clay Robinson and Robert Schwartz}
}
@article {6780,
	title = {An E.E.C. Viewpoint on Animal Waste Disposal},
	journal = {Philosophical Transitions of the Royal Society of London},
	volume = {296},
	year = {1982},
	month = {1982},
	pages = {333-339},
	author = {Bourdeau, P. and L{\textquoteright}Hermite, P.}
}
@booklet {6775,
	title = {Freshwater Eutrophication and Agricultural Change in the United Kingdom Since the Mid-Nineteenth Century},
	year = {Submitted},
	author = {Brassley, Paul and O{\textquoteright} Sullivan, Paddy}
}
@booklet {6774,
	title = {Nitrogen in the Central Grasslands Region of the U.S.: a Regional Perspective},
	year = {Submitted},
	author = {Ingrid C. Burke and William K. Lauenroth and Cunfer, Geoff and Barrett, John E. and Mosier, Arvin and Lowe, Petra}
}
@article {6798,
	title = {Community and Ecosystem Level Changes in Species-Rich Tallgrass Prairie Restoration},
	journal = {Ecological Applications},
	volume = {Vol. 14},
	year = {2004},
	month = {2004},
	pages = {pp. 1680-1694.},
	author = {Camill, Phillip and et al}
}
@article {6791,
	title = {Pre-Industrial Particulate Emissions and Carbon Sequestration from Biomass Burning in North America},
	journal = {Biogeochemistry},
	volume = {Vol. 24},
	year = {1994},
	month = {1994},
	pages = {pp. 35-51.},
	author = {Clark, J. S. and P. D. Royall}
}
@article {6806,
	title = {The Economic Impact of Setback Requirements on Land Application of Manure},
	journal = {Land Economics},
	volume = {Vol. 75},
	year = {1999},
	month = {1999},
	pages = {pp. 579-591.},
	author = {Fleming, Ronald}
}
@article {6781,
	title = {Nitrogen Fertlizer: Retrospect, Prospect},
	journal = {Proceedings of the National Academy of the Sciences of the United States of America},
	volume = {96},
	year = {1999},
	month = {1999},
	pages = {1175-1180},
	author = {Frink, Charles R. and Waggoner, Paul. E and Ausubel, Jesse H.}
}
@article {6801,
	title = {The Nitrogen Cascade},
	journal = {BioScience},
	volume = {Vol. 53},
	year = {2003},
	month = {2003},
	pages = {pp. 341-356.},
	author = {Galloway, James N. and et al}
}
@article {6799,
	title = {Nitrogen Cycles: Past, Present, and Future},
	journal = {Biogeochemistry},
	volume = {Vol. 70},
	year = {2004},
	month = {2004},
	pages = {pp. 153-226.},
	author = {Galloway, J. N. and et al}
}
@article {6789,
	title = {Application of Organic Amendments to Reduce Volatile Pesticide Emission from Soil},
	journal = {Environmental Science and Technology},
	volume = {32},
	year = {1998},
	month = {1998},
	pages = {3094-3098},
	author = {Gan, J. and Yates, S. R. and Papiernik, S. and Crowley, D.}
}
@booklet {6773,
	title = {Social and Environmental Factors in the Crisis of Traditional Organic Agriculture.  A Case Study},
	year = {Submitted},
	author = {Gonzalez, Manuel de Molina}
}
@article {6784,
	title = {Agicultural Development and Advisory Service (A.D.A.S.) Recommendations to Farmers on Manure Disposal and Recycling},
	journal = {Philosophical Transactions of the Royal Society of London. Series B, Biological Sciences},
	volume = {296},
	year = {1982},
	month = {1982},
	pages = {329-332},
	author = {Gostick, K. G.}
}
@article {6783,
	title = {The Effect of Agriculture on Manure Oxidation in Soil},
	journal = {Philosophical Transitions: Physical Sciences and Engineering},
	volume = {351},
	year = {1995},
	month = {1995},
	pages = {313-324},
	author = {Goulding, K. W. T. and Hutsch, B. W. and Webster, C. P. and Wilson, T. W. and Powlson, D. S.}
}
@article {6800,
	title = {Pre-Industrial and Contemporary Fluzes of Nitrogen through Rivers: A Global Assessment Based on Typology},
	journal = {Biogeochemistry},
	volume = {vol. 68},
	year = {2004},
	month = {2004},
	pages = {pp. 71-105.},
	author = {Green, Pamela and et al}
}
@article {6790,
	title = {Denitrification in a Tallgrass Prairie Landscape},
	journal = {Ecology},
	volume = {Vol 74},
	month = {(April, 1993)},
	pages = {pp. 855-862.},
	author = {Groffman, Peter M. Charles W. Rice and James M. Tiedje}
}
@article {6807,
	title = {Nitrogen Limitation in Dryland Ecosystems: Responses to Geographical and Temporal Variation in Precipitation},
	journal = {Biogeochemistry},
	volume = {Vol. 46},
	year = {1999},
	month = {1999},
	pages = {pp. 247-293.},
	author = {Hooper, David U. and Loretta Johson}
}
@article {6772,
	title = {Regional Nitrogen budgets and riverine N \& P fluxes for the drainages to the North Atlantic Ocean: Natural and Human influences},
	volume = {35},
	year = {1996},
	month = {1996},
	pages = {75-139},
	publisher = {Kluwer Academic Publishers},
	address = {The Netherlands},
	author = {Howarth, R. W. and Billen, G. and Swaney, D. and Townsend, A. and Jaworski, N. and Lajtha, K. and Downing, J. A. and Elmgreen, R. and Caraco, N. and Jordan, T. and Berendse, F. and Freney, J. and Kudeyarov, V. and Murdoch, P. and Zhu Zhao-Liang}
}
@article {6808,
	title = {The Manure Hits the Land: Economic and Environmental Implications When Land Application of Nutrients is Constrained},
	journal = {American Journal of Agricultural Economics},
	volume = {Vol. 86},
	year = {2004},
	month = {2004},
	pages = {pp. 688-700.},
	author = {Kaplan, Jonathan Robert Johansson and Mark Peters}
}
@book {6785,
	title = {An Economic Evaluation of Liquid Manure Disposal From Confinement Finishing Hogs},
	year = {1966},
	month = {1966},
	publisher = {University of Illinois, College of Agriculture, Agiculture Experiment Station},
	organization = {University of Illinois, College of Agriculture, Agiculture Experiment Station},
	address = {Urbana, IL},
	author = {Kelser, Richhard Prather}
}
@article {6792,
	title = {The Myth of Nitrogen Fertilization for Soil Carbon Sequestration},
	journal = {Journal of Environmental Quality},
	volume = {Vol. 36},
	year = {2007},
	month = {2007},
	pages = {pp. 1821-1832.},
	author = {Khan, S. A. and et al}
}
@book {6786,
	title = {An Economic Evaluation of Liquid Manure Disposal Systems for Dairy Cattle},
	year = {1970},
	month = {1970},
	publisher = {College of Agriculture ans Life Sciences, University of WI},
	organization = {College of Agriculture ans Life Sciences, University of WI},
	address = {Madison, WI},
	author = {Kimball, N. D.}
}
@article {6795,
	title = {Dynamics of Soil Nitrogen and Carbon Accumulation for 61 Years after Agricultural Abandonment},
	journal = {Ecology},
	volume = {Vol. 81},
	year = {2000},
	month = {2000},
	pages = {pp. 88-98.},
	author = {Knops, Johannes and Tilman, David}
}
@article {6805,
	title = {Seasonal Changes in Nitrogen and Moisture Content of Cattle Manure in Cool-Season Pastures},
	journal = {Journal of Range Management},
	volume = {Vol. 38},
	year = {1985},
	note = {Language: 251-254.},
	month = {1985},
	pages = {pp.},
	author = {Lysyk, T. J. E. R. Easton and P. D. Evenson}
}
@article {6803,
	title = {The Geography of Manure},
	journal = {Land Economics},
	volume = {vol. 32},
	year = {1956},
	month = {1956},
	pages = {pp. 25-38.},
	author = {Mather, Eugene and John Fraser Hart}
}
@article {6796,
	title = {Annual Nitrous Oxide Flux and Soil Nitrogen Characteristics in Sagebrush Steppe Ecosystems},
	journal = {Biogeochemistry},
	volume = {Vol. 14},
	year = {1991},
	month = {1991},
	pages = {pp. 1-12.},
	author = {Matson, Pamela and et al}
}
@book {6811,
	title = {Soils and Societies: Perspectives From Environmental History},
	year = {2006},
	month = {2006.},
	publisher = {White Horse Press},
	organization = {White Horse Press},
	address = {Isle of Harris, UK.},
	author = {McNeill, J. R. and Verena Winiwarter eds.}
}
@booklet {6787,
	title = {Using On-Farm Nutirent Balances as a Monitoring Tool},
	year = {Submitted},
	url = {http://www.iatp.org/iatp/},
	author = {Muller, Mark}
}
@article {6804,
	title = {Economic and Environmental Impacts of Pasture Nutrient Management},
	journal = {Journal of Range Management},
	volume = {Vol. 56},
	year = {2003},
	month = {2003},
	pages = {pp. 218-226.},
	author = {Osei, Edward and et al}
}
@article {6794,
	title = {The Soils of the Interior Plains of Western Canada},
	journal = {Prairie Forum},
	volume = {Vol. 9},
	year = {1984},
	month = {1984},
	pages = {pp. 217-230.},
	author = {Robertson, James A.}
}
@book {6779,
	title = {Fertilizer Nitrogen:  Its Chemistry and Technology},
	year = {1964},
	month = {1964},
	publisher = {Reinhold Publishing Compamy},
	organization = {Reinhold Publishing Compamy},
	address = {USA},
	author = {Sauchelli, Vincent}
}
@booklet {6788,
	title = {A Balance Sheet Method of Determining the Contribution of Agriculture Waste to Surface Water Pollition},
	year = {1970},
	month = {1970},
	publisher = {Department of Agriculture Economics, Cornell University},
	author = {Schultz, David A.}
}
@article {6793,
	title = {Mass, Nitrogen, and Phosphorus Dynamics in Foliage and Root Detritus of Tallgrass Prairie},
	journal = {Ecology},
	volume = {Vol. 69},
	year = {1988},
	month = {1988},
	pages = {pp. 59-65.},
	author = {Seastedt, T. R.}
}
@article {6797,
	title = {Effects of Nitrogen: Phosphorus Supply Ratios on Nitrogen Fixation in Agricultural and Pastoral Ecosystems},
	journal = {Biogeochemistry},
	volume = {Vol. 18},
	year = {1992},
	month = {1992},
	pages = {pp. 19-35.},
	author = {Smith, Val H.}
}
@book {6782,
	title = {Using Manure to Improve Soil Fertility},
	year = {1886},
	month = {1886},
	publisher = {Department of Agriculture},
	organization = {Department of Agriculture},
	address = {Baton Rouge, LA},
	author = {Stubbs, William Carter}
}
@article {6776,
	title = {Productivity and Sustainability Influenced by Bioiversity in Grassland Ecsystems},
	volume = {379},
	year = {1996},
	month = {1996},
	pages = {718-720},
	author = {Tilman, David and Wedin, David and Knops, Johannes}
}
@article {6809,
	title = {Towards an Ecological Understanding of Biological Nitrogen Fixation},
	journal = {Biogeochemistry},
	volume = {Vol. 57},
	year = {2002},
	month = {2002},
	pages = {pp. 1-45.},
	author = {Vitousek, Peter M. and et al}
}
@book {6812,
	title = {Tales from the Underground: A Natural History of Suterranean Life},
	year = {2002},
	month = {2002.},
	publisher = {Da Capo Press},
	organization = {Da Capo Press},
	author = {Wolfe, David W.}
}