TY JOUR TI PROBLEMS OF RATIONAL USE OF LAND OF THE RAVINE-GULF COMPLEX KW geoecology KW gully-valley complex KW water erosion KW anti-erosion measures KW and agricultural land use KW agricultural landscape JO MOSCOW ECONOMIC JOURNAL AU Maslyaev, V.N. AU Lagutenkov, I.S. AU Evseev, A.D. AU Kurochkin, D.V. AU Terehin, D.Y. PY 2025 IS 10 PB Electronic science