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Rice husk. Rice hulls or husks are the hard protecting coverings of grains of rice. In addition to protecting rice during the growing season, rice hulls can be put to use as building material, fertilizer, insulation material, or fuel. Rice hulls are part of the chaff of the rice.
The efficiency of nutrient uptake by crops from fertilizers or residue release is generally thought to be similar. For example, about 50 percent recovery of N in the above-ground plant in the first year. There is some residual benefit of fertilizers as the crops take up a small amount of the nutrients two and three years later.
Rice plant (Oryza sativa) with branched panicles containing many grains on each stem Rice grains of different varieties at the International Rice Research Institute. Rice is a cereal grain and in its domesticated form is the staple food of over half of the world's population, particularly in Asia and Africa.
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Chaff (/ tʃ æ f /; also UK: / tʃ ɑː f /) [1] is dry, scale-like plant material such as the protective seed casings of cereal grains, the scale-like parts of flowers, or finely chopped straw. Chaff cannot be digested by humans, but it may be fed to livestock , ploughed into soil, or burned.
As with other plants in the family Asteraceae, each "flower" is actually a head of flowers, each 2–3 mm (0.08–0.1 in) in diameter. In this species, the "flowers" are themselves arranged in corymbs, the corymbs in branching heads containing from a few to hundreds of individual "flowers". The white or pinkish coloration is due to the papery ...