Effect of fertilizer systems on yields and quality indicators of the green mass of the vetch – oat mixture on different acidity backgrounds

In a long-term field experiment on sod-podzolic soil, it has been found that decreased acidity of the arable soil layer by 0.6-0.7 units pH after liming increases the yield of the green mass of the vetch – oat mixture by 8%. At the same time, dependence of the green mass quality indicators on weather conditions decreases. Application of an organo-mineral fertilizer system at a dose of cattle manure of 50 t/ha+N30P30K30, contributes to the production of green mass yields, depending on weather conditions from 32.3 to 47.1 t/ha (on average, according to the experience, +69% compared to the variant without fertilizers). At the same time, this fertilizer system used on soil having almost neutral reaction of the medium (limed) ensures the yield of crude protein of 1.02 – 2.16 t/ha, depending on the weather conditions of the growing season.