Assertion: cowpea's grain | /r/MadeOf | 64% carbohydrate
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Source sentences:
text: Its nutritious grains contain about 21–31% protein and 64% carbohydrate (Bressani, 1985; Timko and Singh, 2008; Gerrano et al., 2019), while it has been reported that cowpea fodder could contain up to 18.6 g protein per 100 g dry weight (Duke, 1990).