North Dakota State University * Dickinson Research Extension Center
1133 State Avenue, Dickinson, ND 58601 Voice: (701) 483-2348 FAX: (701)
483-2005
A COMPARISON OF WHEAT YIELDS ON CONTINUOUS CROPPING, CORNLAND AND FALLOW, FERTILIZED AND UNFERTILIZED
This trial was begun in 1959 to compare the results of commercial fertilizer application on three different cropping systems over a long period of years. While there is considerable information available on work with commercial fertilizer application on wheat in North Dakota not very much of it is on sites such as these where data are kept on cropping history and fertilizer application over a long period of years.
Complete background information and procedure are on file at the Dickinson Experiment Station under Agronomy Project Outline Number 12.
Data from the 1965 trial are given in table 29. Table 30 summarizes yields from this trial for six the year period 1959-65.
| Table 29. Wheat Yields on Continuous Cropping Cornland and Fallow, Fertilized and Unfertilized | ||||
| Treatment | Yield in Bushels Per Acre | |||
| 1 | 2 | 3 | Average | |
| Spring Plowed, Continuous Cropping | 17.3 | 16.5 | 18.1 | 17.3 |
| Spring Plowed, Continuous Cropping-Fertilized | 22.8 | 18.1 | 25.9 | 22.3 |
| Summerfallow | 29.8 | 31.4 | 33.0 | 31.4 |
| Summerfallow, Fertilized | 32.2 | 32.2 | 37.7 | 34.0 |
| Disked Cornland | 21.2 | 25.9 | 26.7 | 24.6 |
| Disked Cornland - Fertilized | 29.8 | 33.0 | 31.4 | 31.4 |
| Table 30. Summary of Wheat Yields on Continuous Cropping Cornland and Fallow, Fertilized and Unfertilized for the Period 1959-65. | ||||||||
| Treatment | Bushels Per Acre | |||||||
| 1959 | 1960 | 1961 | 1962* | 1963 | 1964 | 1965 | Average | |
| Spring Plowed, Continuous Cropping | 6.7 | 10.8 | 4.8 | --- | 17.8 | 8.6 | 17.3 | 9.4 |
| Spring Plowed, Continuous Cropping, Fertilized | 8.1 | 12.5 | 3.9 | --- | 19.4 | 10.7 | 22.3 | 11.0 |
| Summerfallow | 11.1 | 15.3 | 6.2 | --- | 28.1 | 13.0 | 31.4 | 15.0 |
| Summerfallow, Fertilized | 12.9 | 22.0 | 8.1 | --- | 33.8 | 16.1 | 34.0 | 18.1 |
| Disked Cornland | 7.3 | 10.6 | 0.0 | --- | 18.7 | 10.6 | 24.6 | 10.3 |
| Disked Cornland, Fertilized | 8.6 | 13.6 | 0.0 | --- | 25.7 | 11.8 | 31.4 | 13.0 |
| *Trials destroyed by Hail in 1962. | ||||||||
| Table 31. Rotation - Fertilizer Protein Samples. 1964-1965. | ||
| Treatment | 1964 | 1965 |
| Wheat on: | ||
| Spring Plowed Stubble | 15.00 | 13.50 |
| Spring Plowed Stubble - Fertilized | 14.10 | 13.00 |
| Disked Cornland | 14.50 | 14.10 |
| Disked Cornland - Fertilized | 14.60 | 13.60 |
| Summerfallow | 18.00 | 15.60 |
| Summerfallow - Fertilized | 18.00 | 15.50 |