Evaluating the effects of manual hoeing and selective herbicides on maize (<i>Zea mays</i> L.) productivity and profitability.

Highly significant correlations (**: P ≤ 0.01) were found between total plant height and leaf area (R = 0.95), dry grain yield and leaf area (R = 90), leaf area and the chlorophyll content (R = 0.70).

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