RESPONSE OF OILSEED FLAX OF VNIIMK 620 AND SEVERNUY VARIETIES TO FALL-PLOUGHING IN THE MIDDLE URAL
In 2016-2017 on the experimental areas of JSC “Uchkhoz Iyulskoe of Izhevsk State Agricultural Academy” the studies were conducted to identify the reaction of oilseed flax of VNIIMK 620 and Severny varieties to spraying with Zero herbicide after harvesting its predecessor and the methods of fall-tillage by forming the yield of seeds. The soil of the experimental plot is sod-podzolic medium loamy. The predecessor is winter triticale. On average, over two years of research of the oilseed flax of VNIIMK 620 and Severnuy varieties, they increased seed productivity by 2.2-7.2 centners per hectare or 1.6-2.8 times in variants with fall-tillage KN-4, PLN-4 -35, BDT-3, relative to the same indicator in the variants without fall-ploughing. In the variant with soilless autumn-tillage of KN-4, the productivity of oilseed flax VNIIMK 620 (11.0-11.3 centners per hectare) and Northern (10.6-11.4 centners per hectare) was on the same level as the seed yield in option with dump soil treatment PLN-4-35 (10.9-11.2 centners per hectare and 11.3-11.5 centners per hectare, respectively). However, in the version without the use of the herbicide Zero with the small tillage of the BDT-3, since autumn the seed yield decreased by 1.8-2.0 centners per hectare (16-18%) in the variety VNIIMK 620 and by 1.9 centners per hectare ( 17%) for the Northern variety, in comparison with the yield in the variants with the treatment of KN-4 and PLN-4-35. In the variant with spraying with Zero herbicide and ground treatment of BDT-3 soil, the yield of oilseed flax VNIIMK 620 and Severny did not have significant differences with seed yield in variants with KN-4 and PLN-4-35.