TY JOUR TI The balance of humus in the cultivation of crops on the developed lands of the Non-Chernozem region, depending on the fertilizer system and methods of their sealing KW humus balance KW crop rotation crops KW fertilizer system KW organic waste KW crop and root residues JO INTERNATIONAL AGRICULTURAL JOURNAL AU Shevchenko, V.A. AU Solovyev, A.M. AU Bondareva, G.I. AU Popova, N.P. PY 2026 IS 0 PB Electronic science