00643naa#a2200193#i#450# EN\\bibl\8239 20241228142034.6 2073-0462 20150915b2015####ek#y0engy0150####ca RUS RU POTATO PRODUCTIVITY OF DIFFERENT GROUPS OF RIPENESS, DEPENDING ON METHODS OF AGRO-MACHINERY CULTIVATION ON GRAY FOREST SOILS OF THE MIDDLE VOLGA STEPPE Journal article Kazan Kazan state agrarian University 2015 4 с. Journal article local Chekmarev Petr Gareev Ilgiz Vladimirov Vladimir Petrovich zh-szf.ru