1. Krissoff B. , Ballenger N. , Dunmore J. , and Gray D. 1996. “Exploring Linkages among Agriculture, Trade, and the Environment: Issues for the Next Century.” Agricultural Economic Report No. 738, Washington, D.C.: USDA.
2. Potential Health Consequences of Ground-Water Contamination by Nitrates in Nebraska.;Weisenburger;Nebraska Medical Journal,1993
3. FAO. 1995. Agrostat Database. Rome.
4. Ball V.E. 1989. Estimating Supply Response of Multiproduct Farms. Technical Bulletin No. 1750. Washington, D.C.: USDA/ERS.
5. Researchers have linked nitrates to various health hazards (Walton 1951; Mirvish 1991; Bruning-Fann and Kaneene 1993; Morales Suarez-Valera et al. 1993; Weisenburger 1993; Wu et al. 1993; Zandjani et al. 1994).