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。
Wheat field weed survey was conducted using an inverted W-pattern with 9 sampling points in the north region of Heilongjiang province.
动态取样应当避免对洁净区造成不良影响。
Sampling methods used in operation should not negatively impact cleanliness level in the zone.
森林土壤取样的研究结果表明：基于设计的取样策略主要建立于传统的调查取样的基础上，需要多少样本，研究区应设定多大范围是设计考虑的主要内容。
Result of forest soil sampling indicates that: design-based approach is mainly based on the traditional investigation, the number of samples and study area are mostly considered by this approach.
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