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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

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