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The reaction of early-ripening potato varieties to the planting rate in the Middle Urals

The article presents the yield of early potato varieties, considering the different planting rates of tubers. A two-factor field experiment was conducted in 2013 - 2015 at the experimental field of the Perm State Agro-Technological University named after Academician. The purpose of the research is to find ways to cultivate early-ripening potato varieties to obtain a yield of 35 t/ha. The soils of the experimental site are sod-finely podzolic medium loamy. The humus content is 1.9 - 3.2%, pH (KCl) 4.4-5.1, P2O5 185-300 mg/kg, K2O 143-431 mg/kg. The meteorological conditions of the growing seasons were opposite in terms of weather conditions and did not equally affect the yield. It was found that, on average, over three years, the goal of the experiment was achieved only in one variant of the experiment - in the Rosalind variety with a maximum thickening of 71.4 thousand tubers per hectare. The limit of thickening in the Red Scarlett variety was at the maximum thickening of tubers when planting 71.4 thousand. The limit of thickening of the Luck variety was 47.6 thousand tubers, the limit of compaction of plantings in the Rosalind variety was 57.1 thousand tubers. Keywords: POTATO, VARIETY, YIELD, PLANTING RATE