Fig. 3. Yield of fresh green forage from selected grass–legume mixtures grown under irrigation at Logan, UT, during 1947 to 1951. The selected mixtures were of the seven highest yielding legumes and grasses (Ladino white clover, alfalfa, red clover, smooth bromegrass, orchardgrass, tall oatgrass, and reed canarygrass) from Experiment D in Fig. 2. The low-yielding seven-species mixture consisted of a (then) recommended mixture of smooth bromegrass, orchardgrass, alsike clover, Kentucky bluegrass, meadow fescue, perennial ryegrass, and a small-leafed white clover. This mixture became dominated by grasses during the experiment. Plots were grazed three or four times per year with milking cows and yields measured before grazing. Data points are averages of 5 yr. Adapted from Table 9 from Bateman and Keller (1956).