Productivity of fodder crop rotation in the conditions of the Far North

The introduction and development of fodder crop rotations in soddy-podzolic soils is an important aspect not only for the formation of a stable forage base, but also for increasing and maintaining the soil fertility. Optimisation of crop rotations favours the efficient use of water and energy resources, as well as improves the soil fertility. The methodological basis for the research was a comprehensive assessment of soils, green mass of annual and perennial plants, as well as potato tubers on the territory of a long-term field experiment launched in 1978 by the Institute of Agrobiotechnologies, Komi Science Centre of the Ural Branch of the Russian Academy of Sciences. By the obtained results, the combined use of organic and mineral fertilisers in high doses increased the yield of potato up to 3.3–5.5 t dry weight/ha, green mass of perennial grasses up to 9.2–12.0 t dry weight/ha and 4.0–5.3 t feed units/ha, green mass of annual grasses up to 2.9–3.4 t dry weight/ha and 2.5–2.9 t feed units/ha. This logically increased the quality of green feeds.