00550naa#a2200181#i#450# EN\\bibl\11639 20241126102336.2 2073-0462 20160325b2016####ek#y0engy0150####ca RUS RU DENSITY COMPOSITION OF TOPSOIL, DEPENDING ON VARIETY AND METHODS OF BASIC SOIL CULTIVATION Journal article Kazan Kazan state agrarian University 2016 3 с. Journal article local Shashkarov Leonid Ovchinnikov Aleksandr naukaru.ru