Influence of water erosion and different tillage systems for growing corn on sloping agricultural lands on the loss of available forms of phosphorus and potassium from the soil

Kuncheva, G., Dimitrov, P., & Beloev, H. (). Influence of water erosion and different tillage systems for growing corn on sloping agricultural lands on the loss of available forms of phosphorus and potassium from the soil. // <I>Proc.<D> 57th Science conference of university of Ruse ''A. Kanchev'', 57, 2018, № 1, с. 65-70..