TY JOUR TI MODERN METHODS OF FORMATION AND ASSESSMENT OF SUSTAINABILITY OF AGRICULTURAL LANDSCAPES KW sustainability of the agricultural landscape KW agroecosystem KW ecological stability KW biotic element KW productivity KW coefficient KW self-regulation KW land use JO MOSCOW ECONOMIC JOURNAL AU Dzhafarov, V.V. AU Kutavin, I.A. PY 2025 IS 10 PB Electronic science