coefficient of humus decrease是什么意思

用法例句

The study on the mineralization rate and humification coefficient of cake fertilizer in soil of tobacco field;

饼肥在植烟土壤中的矿化速率和腐殖化系数分析

Study on decomposition and humification coefficient of organic fertilizer in arid region;

干旱地区有机肥料腐解及腐殖化系数的研究

Humification coefficients and decomposition ratio of 7 sorts of organic matter,mineralization ratio of soil organic matter have then tested.

采用砂滤管法和田间试验，结合室内分析，测定了７种有机物料的腐殖化系数、分解量以及土壤有机质矿化率。