Estimated soil clay contents (P_0.002) obtained from consistency limits were evaluated by means of comparison with the results of the conventional hydrometer test (P_0.002h). In total, 180 soil samples were tested for Atterberg limits, linear shrinkage and clay content to generate the data used for statistical evaluation. It was found that there is a strong correlation between P_0.002 and P_0.002h, with realistic and valid statistical equality. However, the variability in P_0.002 estimations – up to 50% – is quite high for practical purposes. Nevertheless, the findings of the study confirm the credibility of the hydrometer method.

中文翻译：

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估算的粘土含量与比重计测量值之间的相关性

通过与常规比重计测试的结果（P _0.002h）进行比较，评估了从稠度极限得到的估计土壤黏土含量（P _0.002）。总共对180个土壤样品进行了Atterberg限值，线性收缩率和粘土含量的测试，以生成用于统计评估的数据。发现在P _0.002和P _0.002h之间有很强的相关性，具有现实和有效的统计相等性。但是，出于实际目的，P _0.002估计中的差异（高达50％）非常高。尽管如此，研究结果证实了比重计方法的可信度。