Subject: period for which weeds are associated with the crop gen. Контекст: The critical period of weed control refers to the part of the crop-growing season in which weeds should be removed in order to prevent crop loss due to weed competition. This depends not only on the nature of weed and crop, environmental conditions and weed density, but also on the period for which weeds are associated with the crop. Понимаю, что имеется в виду то время, когда сорняк растет одновременно с культурой, но не могу красиво выразить.
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