1. Barrington, S.F., Schuepp, P., Capp, R., Blanchette, J., 1990. Peat moss to conserve swine manure nitrogen, in: Agriculture and Food Processing Waste. Proceedings of the Sixth International Symposium on Agricultural and Food Processing Wastes, Chicago, IL. American Society of Agricultural Engineering, St. Joseph, MI, pp. 434–441
2. Nitrogen release from land-applied animal manures;Cabrera,1995
3. Nutrient characterization of stored liquid hog manure;Campbell;Can. Agric. Eng.,1997
4. Mineralization of nitrogen in soils amended with organic wastes;Chae;J. Environ. Qual.,1986
5. Modified reagents for determination of urea and ammonia;Chaney;Clin. Chem.,1962