Oryza sativa . Rice is the only grain grown entirely for human food, not animal feed. Vegetative and cultural characteristics Extensive air chambers in stem and roots, allows aeration of submerged parts. Fern has pockets in leaves, filled with cyanobacterium Anabaena which fixes nitrogen from the air, makes it available to fern. Grain cultivation, harvesting and milling Paddies are drained for harvesting, either by hand or combine.
Brown rice is dehulled whole grain, has more vitamins and oil than polished white rice.
Due to hybridization and natural selection, there are now several kinds of weedy rice which are a threat to cultivate rice Extensively cultivated and globally consumed, including the United States . Hordeum vulgare , brewing, animal feed. Fourth most important cultivated grass. Sorghum is the fifth most important cultivated grass. Grain sorghum .