Several hybrid corns and grain sorghums were grown in adjacent plots and given identical treatments in so far as possible for three consecutive years. Mineral composition of plant tissues taken at several growth stages were compared. Values were found to be quite similar in seedling whole‐plant samples, but major differences were demonstrated in vegetative, bloom, and fruiting stage leaf samples. There is a need for specific grain sorghum nutrient sufficiency values.
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Raymond B. Lockman (1972) studied this question.
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