noun
: a unit of grazing value equivalent to one acre of land entirely covered with herbage that can be completely utilized by grazing animals — abbr. F.A.
noun
: a unit of grazing value equivalent to one acre of land entirely covered with herbage that can be completely utilized by grazing animals — abbr. F.A.
Webster's New International English Dictionary. Новый международный словарь английского языка Webster. 2012