The planting of crops such as peas and beans (leguminous plants), which add nitrogen to the soil, on an alternating basis with crops such as corn, wheat, etc., which take nitrogen from the soil.
The number of cubic feet in a building, measured from the exterior surfaces of the exterior walls and roof, and the interior surface of an unfinished floor or six inches below the finished surface of the floor.
A system of measuring volume or space by using cubic units. One cubic inch is 1 inch long by 1 inch wide by 1 inch high; 1728 cubic inches equals 1 cubic foot; 27 cubic feet equals 1 cubic yard.