根据国内外资料提出了使用比重计法分析土颗粒的精度要求。
The requirement in accuracy for mechanical analysis with the hydrometer is presented also.
与比重计法测定结果的对比分析表明，显微图像分析法是可靠的。
Compared with the testing result of densimeter method, it is shown that the testing result of microscopic image analysis method is credible.
本文介绍了三种快速预测畜禽粪便肥料成分含量的方法，包括比重计测定法、电导仪测定法以及近红外光谱分析法。
In this article, we review three rapid methods to predict manure nutrient content, including hydrometer, conductivity meter and Near Infrared Reflectance Spectroscopy.
本文介绍了三种快速预测畜禽粪便肥料成分含量的方法，包括比重计测定法、电导仪测定法以及近红外光谱分析法。
In this article, we review three rapid methods to predict manure nutrient content, including hydrometer, conductivity meter and Near Infrared Reflectance Spectroscopy.
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