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MCAT Biology

Category - Biology

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Fertilizers can enable farmers to grow the same crop in a ﬁeld for several years in a row. Farmers who use less fertilizer often rotate their crops by planting the crop one year and legumes, such as beans and clover, the following year. Fertilizer use and crop rotation with legumes both increase the availability of which of the following nutrients in soil?

calcium
nitrogen
oxygen
protein

Explanation

Answer: B - nitrogen

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