Researchers are conducting soil sampling.

研究人员正在进行土壤采样。

Weeds removal, plowing and bedding, and soil sampling;

除草、翻犛与作畦，采土样；

That was certainly the case in 1949, as soil-sampling showed.

正如土壤采样所示，1949年的火山喷发确实释放出了汞元素。

NOTE CAREFULLY: Before fumigation, soil sampling for the type and quantity of pests present is recommended.

值得注意的： 在熏蒸，土壤类型和目前的建议害虫数量取样。

Inherent limitation involved in the traditional soil sampling techniques makes it imperative to explore alternative new techniques.

传统的土壤采样技术存在着诸多的不足，使得新技术的探索势在必行。