By means of the experimental data from dynamic triaxial stress-strain test of variable cyclic amplitude for frozen soil, the formative conditions of residual strain on frozen silt clay are studied.
基于不等幅值循环荷载作用下低温三轴振动试验资料，研究了冻结粉质粘土在分级往返加荷情况下的残余应变产生条件。
The released quantity of residual phosphate was opositively related to the content of clay and residual phosphate in soil, and the concentration of lignin in the extracting solution.
木质素用量越大，土壤粘粒越多，残余磷含量越高，木质素释放残余磷的数量越多。
We have seen the varied characteristic of nutrient residual quantity of slow release fertilizer in soil, Both possess activity of slow release in sand or clay soil.
从缓释肥料在土壤的养分残留量变化特点看出，无论在砂质或粘质土壤中，均具缓释作用。
We have seen the varied characteristic of nutrient residual quantity of slow release fertilizer in soil, Both possess activity of slow release in sand or clay soil.
从缓释肥料在土壤的养分残留量变化特点看出，无论在砂质或粘质土壤中，均具缓释作用。
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