Since the advent of Roosevelt's New Deal programs of the 1930s, the U.S. farm sector has, in many circumstances, been very, closely regulated. Yet there appears to be a relative dearth of literature on the direct effect of regulation on the farm sector and U.S. agriculture in general. Perhaps the most pervasive type of regulation is the commodity specific adjustment program. Between 1945 and 1975, at least six major crops (wheat, corn, cotton, rice, peanuts and tobacco) were subjected to some type of production adjustment program.