Several low altitude AERIAL SHOTs of wheat harvest, of combines operating in wheat field. Various evening shots of wheat harvest, combines operating in wheat field. LSs of combine operating in wheat field, Alberta foothills in background. Various shots of swathing machine cutting windrows of ripe wheat. Shots of tractor-drawn John Deere combine in operation in wheat field. Various shots of Department of Agriculture specialists examining sawfly damaged wheat in wheat field, of man putting damaged wheat through miniature thresher.