Abstract
Corn is one of the most important agricultural commodities in U.S. agriculture. The cropland in the United States is increasing 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 Germany. Therefore, a review and summary of currently available literature was done. The calculation of the energy demand includes direct energy (the use of fuel and electricity) and indirect energy (the production of 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.
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