Influence of mineral fertilizers on potash nutrition and productivity of columnar apple

The columnar form of apple tree is promising for growing in super-intensive orchards. mineral nutrition study with crown relevant due to high density planting. article presents the results on effect fertilizers potash and yield tree. experiments were carried out an experimental orchard located forest-steppe zone Central Russian Upland (Oryol region). soil loamy haplic Luvisol a content organic matter. Fruit plantations are represented by trees Poezia variety 62-396 rootstock planted 2016. Urea ((NH 2 ) CO) potassium sulfate (K SO 4 used as doses N60K80; N90K120; N120K160 which introduced early spring. exchange was determined annually layers (0-20 cm 20-40 cm), concentration leaves fruits, yield. use contributed increase both 0-20 layer (45 - 53%) (18-31%). amount fruits also increased. However, (0.77 … 0.95% dry matter) remained significantly below optimum (1.5% matter). A significant average fruit weight revealed options N90K120 N120K160.