Methods of applying fertilizers to wheat
1930
Duley, F.L.
The relative value of broadcasting fertilizer as compared with drilling in the row with wheat was studied during the years 1926-29 at the Kansas Agricultural Experiment Station at Manhattan. Small plats 1/500 acre in area were used. These, were replicated three to four times. The plats were handled by hand. In addition to these, drill-width plats were put in with a fertilizer drill in 1928-29. Comparisons were made here also with broadcasting and with no fertilizer. Superphosphate (16% P2O5) was compared with 2-12-2 fertilizer. The mixed fertilizer was made from sodium nitrate, superphosphate, and potassium chloride. The fertilizers were applied in all cases at the rate of 175 pounds per acre. The results show that the average increase from superphosphate when applied broadcast was 9.03 bushels an acre, while the average increase where the fertilizer was applied in the row with the seed was 16.4 bushels an acre. In other words, there was almost as much difference between row application and broadcasting as between broadcasting and no treatment. On this soil superphosphate showed slightly greater increases than 2-12-2, when used at the same rate of 175 pounds per acre. Applying the fertilizer in the row with the seed gave slightly higher yields than when applied either above or below the seed. The results obtained in drill-width plats in 1929 confirmed the results obtained in the small plats 1927-29, showing that under the conditions of these experiments the use of fertilizer in the row with wheat is decidedly superior to broadcasting on yields of both grain and straw.
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