North Dakota State University * Dickinson Research Extension Center
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Comparison of Wheat Yields on Continuous Cropping, Cornland, and Fallow, Fertilized and Unfertilized
This trial was set up in 1959 to compare long time results from commercial fertilizer application on three different cropping systems.
Fertilizer application on non-fallow land is 25 pounds N and 36 pounds P2O5 per acre. On fallow land the rate of application is 8 pounds N and 36 pounds P2O5 per acre.
Yields in this trial for the past two years are summarized in Table 9.
| Table 9. Wheat Yields on Continuous Cropping, Cornland and Fallow, Fertilized and Unfertilized | |||||||||
| Treatment | Plots | 1960 Yield BPA | 1959 Yield | 2 Yr. Av. | |||||
| 1 | 2 | 3 | Av. | ||||||
| S. P. Continuous | 71 | 80 | 103 | 11.1 | 10.5 | 10.8 | 10.8 | 6.7 | 8.8 |
| S. P. Continuous, Fertilized | 70 | 81 | 102 | 14.0 | 12.4 | 11.1 | 12.5 | 8.1 | 10.3 |
| Fallow | 68 | 83 | 100 | 15.5 | 15.0 | 15.3 | 15.3 | 11.1 | 13.2 |
| Fallow, Fertilized | 66 | 85 | 98 | 19.5 | 20.3 | 26.2 | 22.0 | 12.9 | 17.5 |
| Disked Cornland | 62 | 89 | 94 | 11.3 | 9.0 | 11.6 | 10.6 | 7.3 | 9.0 |
| Disked Cornland, Fertilized | 64 | 87 | 96 | 17.1 | 13.0 | 10.8 | 13.6 | 8.6 | 11.1 |