EN
In field experiments the influence of slurry application on P, K, Ca, and Mg contents in dry matter of Zea mays, potatoes, and sugar beet have been studied. Slurry application caused decreasing of P, Ca, and Mg (exception P in Zea mays and Mg in potatoes) but increasing of K (exception of sugar beets roots) in tested plants. The changs in the ratio of Ca: P, and K: (Ca+Mg) were positive (exception of sugar beet roots).