4 · Society, Civilization, Culture
47 · crafts and industries
47I · agriculture, cattle-breeding, horticulture, flowerculture, etc.
47I1 · agriculture
47I11 · plants ~ agriculture
47I111 · cereal, grain, corn (grass with grains, grown for food, e.g.: wheat, rice, rye, oats, maize, buckwheat, millet)