Excerpts from the Introduction: This study attempts to evaluate several general cropland retirement proposals as possible programs for U.S. agriculture. It is a sequel to a 1968 study of general cropland retirement. Only the short-run regional and national implications of the proposals are examined. The study is not an equilibrium analysis. Demand for farm products is not considered; product prices are included as farmers' expectations. The analysis simulates a first-year response to a general cropland retirement program. No corrections are made of any disequilibrium in the product market caused by the first year's land retirement. In the first major section of this report, proposed general cropland retirement programs retiring part-farm units are considered. The second major section discusses proposed programs retiring whole farms. In the third, study results are compared with actual results of the 1969 feed grain and wheat diversion program and the 1956 conservation reserve program, and with results from other studies of general cropland retirement. Both sections 1 and 2 report estimates of land retirement patterns, Government costs, and production adjustments for proposed cropland retirement programs based on two retirement criteria.