Abstract
Corn is one of the most important agricultural commodities in U.S. agriculture not least because of the expansion of ethanol production. The main purpose of this analysis is to quantify the total energy input used to produce corn in Wisconsin and to improve the quality of data and the methodology in the estimation. Therefore a comprehensive literature review was done. The calculation of the energy demand includes direct energy (for example fuel, electricity) and indirect energy (for example fertilizer, seed and machines). Data from the United States Department of Agriculture (USDA) are used to assess the development of the cultivation of corn over the last 30 years; especially the yields and the input of fertilizer in corn production are regarded.
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