(XXXVII) The things which are harmful to corn land are to plough the ground when it is rotten, and to plant chick peas which are harvested with the straw and are salt. Barley, fenugreek and pulse all exhaust corn land, as well as all other things which are harvested with the straw. Do not plant nut trees in the corn land. On the other hand, lupines, field beans and vetch manure corn land.
(VI) Where the soil is rich and fertile, without shade, there the corn land ought to be. Where the land lies low, plant rape, millet, and panic grass.