soil humus meaning in English

土壤腐植质
土壤腐殖质

The influences of reinforcing cement soil on soil humus
土体腐殖质对水泥土固化的影响
The division between subtropical zone and warm temperate zone according to the compositions and properties of soil humus
试从土壤腐殖质组成和性质论伏牛山南侧亚热带北界的划分
( 4 ) the results of ftir showed that the ftir spectrum of decaying remainders at all periods was near to that of original samples , and was far to that of soil humus
( 4 )红外光谱分析结果，腐解物原样的红外光谱各主要吸收带均较窄且强度较大，而腐殖酸的红外光谱各主要吸收带均较宽且峰尖平缓。
The c / n ratios of corn residues and soybean residues still kept at 26 - 29 , 29 - 36 at the end of experiment respectively , and were much higher than that of soil humus . it showed that the humification did n ' t complete after 13 months " decaying at the end of experiment
试验结束时，玉米秸和大豆秸c n比分别为26 - 29和29 - 36 ，远大于土壤腐殖酸的c n比，说明腐殖化作用还未完成。