基于苜蓿长期连续种植定位试验，研究了不同施肥与采样位置差异对苜蓿草地地上部分生物量和土壤水分的影响。
Impacts of fertilization and sampling position on soil moisture and aboveground biomass of Medicago sativa were studied in a long term, in situ experiment.
该测量仪采用立式回转轴结构，优点是避免产生挠度变形，提高了测量精度，该仪器采用数据自动采集装置，采样位置准确，速度快。
The vertical construction which can avoid deflection deformation is used. Data auto-sampling device is used in the measurement, so the sampling position is accurate and the sampling speed is high.
地下水污染监测网的设计包括取样点在空间上的采样位置和时间上的取样频率这两方面的确定，其目的是为了准确刻画污染羽在含水层中随时间的变化状况。
The groundwater monitoring network design involves the determination of the sampling locations and sampling frequencies to characterize the contaminant plume in an aquifer over space and time.
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