engleski

Influence of potassium fertilization and liming on maize, wheat and soybeans

Eastern Croatia province occupies about 20% territory of Croatia and 30% of its arable land capacity. However, this province produces about 50% of its maize, nearly 60% of total wheat and nearly 90% of total soybean production. Some nutritional problems (appearance of either P, K or Zn deficiency) have been found recently, especially in maize and soybean plants. Potassium deficiency and excess of plant available Ca and Mg are the main reasons for the appearance of K deficiency in maize and soybean plants. Normalization of plant and soil status were made by enormous application of KCl. As affected by application of 2200 kg K/ha, grain yield of corn was increased from 1.93 t/ha (control) to 7.64 t/ha and soybean from 1.29 t/ha (control) to 2.61 t/ha. In general, liming of acid soils is a usual recommendation for their improvement. Based on our experiences with two field trials, maize, soybean and barley grain yields increased due to liming by 10% or less than 10%, while wheat showed no response to lime application.However, under conditions of the soil B , lime application resulted by maize and wheat yields decrease, but this phenomenon is impossible to explain by the performed soil test .

potassium; liming; maize; wheat; soybeans; fertilization

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