TY JOUR TI INFLUENCE OF THE SOLID FRACTION OF PIG MANURE ON THE STRUCTURAL STATE OF QUASI-GLEYIC AGROCHERNOZEM KW solid fraction of pig manure KW quasi-gleyic agrochernozem KW structural-aggregate composition KW water resistance JO Vestnik of Omsk SAU AU ALEKSEEVA, Z.L. AU AZARENKO, Y.A. PY 2023 IS 51 PB FSBEI HE Omsk SAU