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田间取土的代表性、均匀性非常关键。将地块按地力分为几个单元,每单元多点取样、混匀,按对角线法取其部分,土样每袋0.5～1.0kg,写好标签,放入室内风干。风干后研细过筛,直至化验阶段。
The representativeness of earth-taking in the field, the uniformity is very crucial. Divide the plots into several units according to the geotechnical force. Take samples at multiple points per unit and mix well. Take diagonal lines for part of them. Take 0.5 ~ 1.0kg of soil samples per bag. Write the labels and put them into the air-dry indoors. Finely sieved after drying, until the test phase.