TY JOUR TI THE POTENTIAL FOR FOOD FOREST HARVESTING REVENUE INCREASE KW food forest resources KW mushrooms KW berries KW production dynamics KW import KW export KW biological stock KW de facto harvesting KW revenue forecast JO MOSCOW ECONOMIC JOURNAL AU Rusova, I.G. AU Koryakin, V.A. AU Degtev, V.V. AU Golotovskaya, A.V. PY 2026 IS 11 PB Electronic science