Surface area sown with the individual types of grains for use as cereals, divided into spring crops and winter crops. The following surface areas are defined: spring and winter wheat, rye, spring and winter barley, oats, spring and winter rye-wheat. spring and winter cereal mixtures, buckwheat, millets (as well as other cereals, seed corn as well as leguminous grain mixtures (e.g., vetch rye, field peas and oats).