Optimization of Organic Potato Cultivation Technology with Due Account for Changing Weather Conditions on Northern Territories

The research aimed developing a cultivation method of organic potato in the northern territories. The field experiment with Udacha potato variety was a part of the crop rotation started on experimental facilities of IEEP. The test field had a soddy-podzolic, light loamy, gleyic soil with neutral reaction and high organic matter content. The technology of organic potato cultivation was developed in IEEP. It included application of one or two doses (from 60 to 160 kg N ha-1) of BIAGUM compost, prepared from poultry manure, and polyfunctional biologic Kartofin. Weather conditions differed by the experiment years (2019–2023). The driest summer period was in 2021. The dependence of nitrification rate on the air temperature and precipitation for the period from the end May to the end June was found statistically reliable. Potato productivity depended on weather conditions too. The maximum yield (more than 30 or about 30 t ha-1) was achieved when using the maximum dose of compost in 2019, 2020 and 2023. The study established statistically reliable dependence of the standard tuber yield on the soil nitrate content, compost application dose and hydrothermal coefficient in some summer months. The Biologic Kartofin was most efficient against a complex of fungal diseases.