Objective of the research: to study the influence of the norms of mineral fertilizers on the yield and quality of seeds of oil flax varieties in the conditions of the northern forest-steppe of the Tyumen region. The studies were carried out on the experimental field of the State Agrarian University of the Northern Trans-Urals in 2019-2020. The soil of the experimental field is leached chernozem, thin, heavy loamy. Experimental options included: control, without fertilizers; NPK based on seed yield 2 t/ha; NPK based on seed yield of 3 t/ha. Increases in yield from the use of fertilizers in the studied varieties August and Sokol were obtained in 2019, the growing season of which was characterized by the amount of precipitation close to the long-term level. In 2020, when there was a shortage of precipitation, only the Sokol variety showed a positive reaction to fertilizers. Under the influence of fertilizers, the seed oil content of the August variety decreased, while the Sokol variety was at the same level in all variants.

Barley is cultivated mainly for feed purposes in the Tyumen region. At the same time, there is a need to obtain brewing barley grain. This research is aimed at establishing the influence of elements of cultivation technology on the productivity of barley varieties and identifying the compliance of grain quality indicators with the established requirements. The studies were performed in three field experiments on the experimental field of the of the Northern Trans-Ural State Agricultural University in the northern forest-steppe of the Tyumen region in 2014 - 2016. In terms of the complex indicator – the collection of protein from a unit area – the Lamador Pro + Rostok variant stood out: for the Acha variety, this indicator was 612 kg/ha, for the Abalak variety - 646 kg/ha. The best indicators were obtained in the variant with the use of Hydromix complex for treating the seeds: for the Acha variety, the yield was 4.55 t/ha, for the Abalak variety - 4.62 t/ha, the protein content in the grain was 13.1 and 13.3%, respectively. In terms of yield, Omsky 85, Payjazz and Beatrice varieties surpassed the standard. The obtained research results are recommended for implementation at the enterprises of the agro-industrial complex of the Tyumen region.

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