Application of sulfurous fertilizers under oil crops on leached chernozem

The leached chernozems of Western Ciscaucasia, according to its sulfur content and stocks, are related into group with low content of movable sulfates. The content of movable sulfur is less than 0.6 mg/100 g of soil, the content of total sulfur is 24.7-39.3 mg/100 g of soil, including 2.2-6.2% of mineral forms. The stocks of mineral and movable sulfur are up to 47.5 and 9.58 kg/ha. Application of sulfurous preparations combined with main mineral fertilizers promoted the significant increase of yield of soybean seeds (up to 0.03-0.05 t/ha) and rapeseed seeds (up to 0.13 t/ha) as well as protein and oil yield of these crops per a hec- tare. The highest payback of a kilo of reactant of sul- furous fertilizers by seeds and oil yields increases was determined.