00643naa#a2200205#i#450# EN\\bibl\78308 20260220074053.5 1819-4036 20140625b2014####ek#y0engy0150####ca RUS RU THE ARABLE LAND PRODUCTIVITY DEPENDING ON THE PRIMARY TILLAGE SYSTEM OF THE DARK-GRAY FOREST SOIL IN THE TYUMEN REGION Journal article Krasnoyarsk Krasnoyarsk State Agrarian University 2014 4 с. Journal article local . 631.4:574(571.12) RUS Perfiliev N V Skipin L N Gaevaya E V sej.kgau.ru