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。
A hydrometer used to determine the specific gravity of acid solutions.
比重计：量度液体或溶液的比重的仪器。
The requirement in accuracy for mechanical analysis with the hydrometer is presented also.
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。
A curve fitting and revising methods to solve hydrometer grain analysis is presented, and proved good satisfactory.
提出了密度计法颗粒分析试验的一种曲线拟合及修正方法，经验证效果较好。
Hydrometer: An instrument used for measuring the specific gravity of a liquid or solution.
比重计：量度液体或溶液的比重的仪器。
Hydrometer: An instrument used for measuring the specific gravity of a liquid or solution.
比重计：量度液体或溶液的比重的仪器。
应用推荐