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Leguminous plants, such as clover, are able to survive in soil in low nitrate conditions. Explain why. Use the information below to help you answer the question in your book Clover is a type of Legume. These are a group of plants that are adapted to take in nitrogen from the air. Other plants are not able to do this despite the high amount of nitrogen available in the air. They are able to do this due to the symbiotic relationship they have with the bacteria found on the root nodules. The ability to form this mutualism reduces fertilizer costs for farmers and gardeners who grow legumes, and allows legumes to be used in a crop rotation to replenish soil that has been depleted of nitrogen. Legume seed and foliage have a comparatively higher protein content than non-legume material, probably due to the additional nitrogen that legumes receive through nitrogen-fixation symbiosis. The high protein content makes them desirable crops in agriculture.