Productivity of varieties of Jerusalem artichoke with different density of standing

The work presents the results of a three-year field three-factor experiment. The productivity of Jerusalem artichoke (Skorospelka and Interest varieties) has been researched on the soddy podzolic soil with different plant stand: 47,6; 31,7; 20,4 thousand plants/ha; with two variants of mineral nutrition (calculated dose by the balance method and for full compensation of nutrient removal). It has been found that the best productivity has the Interest variety in raw (69,8 t/ha) and absolutely dry (15,4 t/ha) biomass. The most optimal plant stand for both varieties is 47,6 thousand plants / ha (planting pattern 70 x 30 cm), which provides 27,0 t/ha of tops, 54,6 t/ha of tubers from Skorospelka variety, 17,4 t/ha of absolutely dry biomass and the efficiency factor is 0,61, in the Interest variety: 53,4 t/ha of tops, 40,1 t/ha of tubers, 18,8 t/ha of dry biomass, the efficiency factor is 0,42.