Wheat field weed survey was conducted using an inverted W-pattern with 9 sampling points in the north region of Heilongjiang province.
运用倒置“W”9点取样法，对黑龙江省北部大豆小麦轮作区小麦田做杂草调查。
Evaluation of novel transgenic lines is initially in small-scale field trials, where it is likely that rare events, such as hybridization with weed species, may have insignificant consequences.
新的转基因品种的最初评估是在小规模田间试验中进行的，在此试验条件下，稀有事件例如与杂草种的杂交可能不会产生明显的结果。
On the field of agriculture and plant protection, weed identification technology in machine vision research at home and abroad has made part of the results.
在农业植保领域中，杂草识别在机器视觉技术的研究国内外已经取得了部分成果，绝大多数研究都集中在杂草植株的个体上。
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