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首页> 美国政府科技报告 >Measurement of Moisture Content and Dry Bulk-Density of the Top Layer of Agricultural Soils, with Minimum Calibration, Using a gamma-Ray Attenuation Method
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Measurement of Moisture Content and Dry Bulk-Density of the Top Layer of Agricultural Soils, with Minimum Calibration, Using a gamma-Ray Attenuation Method

机译：使用伽马射线衰减方法测量农业土壤顶层的含水量和干堆积密度，进行最小校准

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Various methods of measuring moisture content and dry bulk-density of soil by means of gamma-ray attenuation are discussed. A new method is described in which the same parameters can be measured in consecutive determinations, but for which only one sample of unknown volume is needed for calibration. This method employs a radioactive source in a lead container in an aluminium tube in the soil. From the container the gamma rays follow a path at an angle upwards through the soil towards the detector. The method was tested in a number of experiments and the results are given in tables and graphs. The conclusion is that this method, which is fairly easy and quick to use, is accurate enough for most applications. (Atomindex citation 09:414619)

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