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Effect of Phosphate Fertilizer Rates on Cowpea Planted at Three Different Spacing Intervals in Tana River County, Kenya
(KeMU, 2016-07)
Cowpea (Vigna unguiculata) is a major source of dietary protein for both humans and animals in many parts of the world along tropical and sub-tropical belt. Annual world production was estimated at 3.3 million tons of grain ...