Feed Grains Improvement Act of 1983

Feed Grains Improvement Act of 1983 - Amends the Agricultural Act of 1949 to reduce target prices: (1) for the 1984 corn crop from $3.03 per bushel to $2.95 per bushel; and (2) for the 1985 corn crop from $3.18 per bushel to $3.03.

Requires farmers, in order to qualify for 1984 price support assistance, to reduce their planted acreage by 15 percent under a combined acreage reduction (ten percent) and diversion (five percent) program. Requires the diverted land to be used for conservation purposes. Sets the program signup date at not earlier than March 30, 1984.

Provides, with regard to the 1984 diversion program, payments of not less than $2.00 per bushel, except that the Secretary may reduce such payments by up to ten percent if appropriate to meet program objectives. Requires advance payments of at least 50 percent.

Provides for 1984 feed gain advance deficiency payments.