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  • Author or Editor: W. Derby Laws x
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Close plant spacing in bush snap beans (Phaseolus vulgaris L.), sweet corn (Zea mays L.), and onions (Allium cepa L.) resulted in less weed competition, as measured by crop plant reproductive parts, than wider row spacings. Early weed competition was important in all crops but weed competition at any time reduced onion yields significantly. Corn required 2 weeks and bush snap beans 3 weeks of cultivation after emergence to eliminate losses due to weed competition. Fresh weights of weed at harvest time were significantly less (0.8 kg) in plots of bush snap beans at the narrow row spacing than in plots with the medium and wide spacings (2.8 and 2.4 kg) in an 0.81 m2 area.

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