1. ASABE. 2006a. Agricultural machinery management data. American Society of Agricultural and Biological Engineers Standard ASAE EP496.3. ASABE, St. Joseph, pp. 385–390.
2. ASABE. 2006b. Agricultural machinery management data. American Society of Agricultural and Biological Engineers Standard ASAE EP496.3. ASABE, St, Joseph, pp. 391–398.
3. Audsley, E., K. Stacey, D.J. Parsons, and A.G. Williams. 2009. Estimation of the greenhouse gas emissions from agricultural pesticide manufacture and use. Bedford: Cranfield University.
4. Bouwman, A.F., L.J.M. Boumans, and N.H. Batjes. 2002. Modeling global annual N2O and NO emissions from fertilized fields. Global Biogeochemical Cycles 16: 281–289.
5. Caldiz, D.O., and P.C. Struik. 1999. Survey of potato production and possible yield constraints in Argentina. Potato Research 42: 51–71.