Table 7. Forage production from old crested wheatgrass plots fertilized annually with ammonium nitrate (33-0-0).
Year Dry weight yield - lbs./acre Percentage increase over check
Check 25# N 50# N 100# N 25# N 50# N 100# N
1955 1276 2096 2121 2494 64.3 66.2 95.4
1956 612 751 763 670 22.7 24.7 9.5
1957 1356 2117 2064 2174 56.1 52.2 60.3
1958 1224 1679 1839 1993 37.0 50.2 62.8
1959 1116 1451 1284 1206 30.0 15.1 8.1
5 - yr. average 1117 1619 1614 1707 44.9 44.5 52.8