| Year | Yield Per Acre (in pounds) | Yield Per Acre (in bushels) |
| 1970 | 4400 | 97.8 |
| 1971 | 4800 | 106.7 |
| 1972 | 4449 | 98.9 |
| 1973 | 4346 | 96.6 |
| 1974 | 3886 | 86.4 |
| 1975 | 4210 | 93.6 |
| 1976 | 4200 | 93.3 |
| 1977 | 3700 | 82.2 |
| 1978 | 4330 | 96.2 |
| 1979 | 3810 | 84.7 |
| 1980 | 4180 | 92.9 |
| 1981 | 4080 | 90.7 |
| 1982 | 4480 | 99.6 |
| 1983 | 4090 | 90.9 |
| 1984 | 4600 | 102.2 |
| 1985 | 4810 | 106.9 |
| 1986 | 5120 | 113.8 |
| 1987 | 5400 | 120.0 |
| 1988 | 5100 | 113.3 |
| 1989 | 5200 | 115.6 |
| 1990 | 4700 | 104.4 |
| 1991 | 5100 | 113.3 |
| 1992 | 4800 | 106.7 |
| 1993 | 4900 | 108.9 |
| 1994 | 5200 | 115.6 |
| 1995 | 5300 | 117.8 |
| 1996 | 5550 | 123.3 |
| 1997 | 5300 | 117.8 |
| 1998 | 5200 | 115.6 |
| 1999 | 5400 | 120.0 |
| 2000 | 5700 | 126.7 |
| 2001 | 5850 | 130.0 |
Source: Missouri Agricultural Statistics Service