During a 6-year evaluation of plantings designed to provide additional winter food for bobwhite quail (Colinus virginianus) on the Fort Riley Military Reservation in Kansas, quail were killed to provide data on food habits, body weight dynamics, and fat content of carcasses. Crop contents of 591 quail were analyzed to determine food habits, 368 quail were weighed to detect seasonal changes in body weights, and 41 quail carcasses were analyzed for ether extractable fat content. Bobwhites within 800 m of food plots used the plots as feeding areas during winter and early spring months. Compared with birds killed farther than 900 m from a food plot during the winter and early spring, quail killed within 600 m of a food plot during the same period had more food in their crops, maintained higher body weights, and had more fat in their carcasses. With the enactment of the Federal Aid to States in Wildlife Restoration Act (commonly known as the Pittman-Robertson Act) in 1937, funds for wildlife research and development became available to state fish and game agencies. Following World War II, great sums of money were invested in habitat-improvement programs. Even though improvement of wildlife habitat has been and continues to be an almost universal endeavor of state fish and game agencies, the effectiveness of many of these habitat-improvement programs to produce larger game populations has not been intensively studied. Evaluations of habitat-improvement programs have been concerned primarily with acreage included and gross 1 Contribution No. 967, Division of Biology, Kansas Agricultural Experiment Station, Kansas State University, Manhattan. Financial assistance was provided by the Wildlife Management Institute, Kansas Forestry, Fish and Game Commission, U. S. Department of the Army, and the Kansas Agricultural Experiment Station. changes in floral characteristics. Lyon (1959), Tester and Marshall (1962), and Vohs (1959) are among the few who have attempted to relate habitat-improvement programs to changes in faunal as well as floral populations. In 1959, a wildlife management program was initiated on the Fort Riley Military Reservation in Kansas under Army Regulations 210-221 (Joselyn 1965:219). The wildlife management program had several aspects, including establishment of food plantings as part of a broad habitat-improvement program. In 1961, G. B. Joselyn (conservation and wildlife management officer at the Fort during 1961-62) invited the author to work with personnel in evaluating certain aspects of the habitat-improvement program. This is a report of a 6-year study of responses of bobwhite quail to food plantings on the Reservation. The interest, efforts, and unlimited cooperation of Fort Riley military personnel,