Effect of long-continued mineral fertilization on maize yield and soil fertility.
1994
Jocic B. | Cirovic M.
In the period 1966-1991, experiments were conducted within the stationary trial. The stationary trial included 4 plant species: wheat, sugar beet, maize and sunflower, which were rotated in the given order. The application of mineral fertilizers over 25 years did not have a significant effect on the pH value, humus and total nitrogen content in the soil. Significant changes occurred in the contents of mineral nitrogen, available phopshorus, and available potassium. The larger changes in chemical composition of the soil were caused by nitrogen fertilizers, followed by phosphorus and potassium fertilizers. In the experimental conditions, the yield of maize depended primarily on nitrogen fertilization, while phosphorus and potassium were of practically no importance.
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