Figure 19. Yields of native grasses and forbs on clay upland shortgrass range near Hays October 1, 1959 and 1960, after forb-control treatments one year only and two consecutive years: (1) No forb control, (2) ester of 2, 4-D sprayed at 1 lb per acre June 10,- (3) grass mowed at a 2-inch height June 10,- and (4) forbs pulled as necessary May to October. One set of plots was treated only in 1959 (yields were taken in 19.59 and again in 1960 to measure residual effects); another set was treated in both 1959 and 1960. Grasses were mainly buffalograss and blue grama; western ragweed was the major forb.