"The plants recommended as most valuable for this use are locally adapted strains of the following crop plants: Alfalfa, Beggarweed, Buckwheat, Bur Clover, Chufa, Clover, Corn, Cowpea, Flax, Hemp, Lespedeza, Millet, Oats, Peanut, Rice (upland), Rye, Sesame, Sesbania, Sorghum, Soybean, Sudan Grass, Sunflower, Vetch, Wheat, and Winter Pea." . . . .