The earth dam foundation at Heilongtan Reservoir in Lunan county, Yunnan province is consisted of silty sand Layer and silty soil with low bearing capacity and poor shear strength.
云南省路南县黑龙潭水库土坝基础属粉细沙层及低液限粉质土，允许承载力低，抗剪强度差，不足以维持坝体稳定。
Soil magnetism of the plough layer is in relatively good correlation with organic carbon and P but shows a rather poor correlation with N and K.
耕作层的土壤磁化率与有机碳、磷含量具有较好的相关性，而与氮、钾含量相关性较差。
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