Many explanations have been offered for the exceptionally large rises in farm prices in the past two years. Some of these are: (1) rising incomes in the developed countries led to increased meat consumption and therefore increased import demand for feed grains; (2) crop short-falls in the U.S.S.R. and the People's Republic of China caused unprecedented increases in import demand thereby depleting grain reserves to an unprecedented low point; and (3) two devaluations of the dollar which reduced U.S. agricultural export prices abroad, thus causing an upward shift in demand and domestic prices because supplies of our agricultural commodities were not able to expand rapidly in the short run. In this paper, I shall test the validity of only one of these explanations the recent dollar devaluations.