Assertion: cowpea | /r/CapableOf | grow the topmost soil
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text: Cowpea is an important economic crop, because of its various attributes such as: ability to adapt to different type of soils and suitability for intercropping, it grows and covers the topmost soil which in turn prevents erosion, all parts of Cowpea are useful even the leaves which can produce 9 times the calories, 15 times the protein, 90 times the calcium and thousands of times