| 土壤机械分析比重计法的研究 |
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| 引用本文： | 邓时琴,夏家淇,熊毅.土壤机械分析比重计法的研究[J].土壤学报,1958,6(1):70-83. |
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| 作者姓名： | 邓时琴 夏家淇 熊毅 |
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| 作者单位： | 中国科学院土壤研究所;中国科学院土壤研究所;中国科学院土壤研究所 |
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| 摘 要： | 目前在国内进行土壤机械分析工作,多采用此重计法,因其简而易行,也有试行速测的研究。为着工作上广大要求,我们会在比重计机械分析中进行一系列的研究,如比重计校正、比重计速测和土粒分散等方面都得了一些结果,现搜集报告以供大家的参考和讨论。
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HYDROMETER METHOD OF MECHANICAL ANALYSIS OF SOILS |
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| S. C. TENG,C. C. HSIA and Y. HSEUNG.HYDROMETER METHOD OF MECHANICAL ANALYSIS OF SOILS[J].Acta Pedologica Sinica,1958,6(1):70-83. |
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| Authors: | S C TENG C C HSIA and Y HSEUNG |
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| Institution: | Soil Institute, Academia Sinica;Soil Institute, Academia Sinica;Soil Institute, Academia Sinica |
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| Abstract: | A definite type of hydrometer with linear and fine stem and parabolic bulb is suggested. Before measurement, the hydrometer should be well calibrated. The contents of soil particles of different size can be directly determined at different time after sedimentation of particles. Grinding the soil sample for five minutes is available for mechanical dispersion of soil particles. 60 ml of 0.5 N NaPO3 for 50 grams of soils is suggested for calcareous soils and 60ml of 0.5 N NaOH for 50 grams of soils is suggested for lateritic soils. |
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