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Abstract
Five factors are found to have had a significant effect on U.S. acreage of wheat planted
during 1961-74: (1) acreage allotment, (2) additional diversion for payment through
1970, (3) set-aside acres in 1971-73, (4) relaxation of allotment restrictions, and (5) the
market price of wheat for the preceding season. Together, these factors explain over 98
percent of the wheat acreage variation during 1961-74. The wheat set-aside program
reduced wheat planting by 0.28 acre for each acre set aside in the winter wheat regions
and by 0.62 acre for each acre set aside in the spring wheat region. It reduced the U.S.
acreage of wheat planted by 0.41 acre for each acre set aside nationally.