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In 2017-2019, it was revealed that fertilizers provide 36 - 51% of the annual crops green mass yield, the collection of raw protein increases by 1.5 - 1.6 times. When N12 was introduced against the background of phosphorus and potassium fertilizers, its content corresponded to 12.50%, and when the N75 was introduced, it increased to 13.6 - 13.7%. Takeaway for N, P, K increased with the use of N 75 P 35 K 130-160  respectively by 1.5 - 1.6 times, by 40 and 80-90% compared to control. The content of NO3 in green mass increased with the use of fertilizers, amounted to 72 - 86% of the maximum allowable concentration. The doses of N 75 P 35 K 130-160  fertilizers are 32 - 34 ton/ha of green mass in a vetch and oat mix and the more negative balance of the fertilizer elements investigated.

The productivity of the vetch and oat mix in crop rotation when using various fertilizer systems in the Vologda region