topsoil词根词缀

Magnetic Susceptibility Characteristic and Its Environmental Significance in Urban Topsoil around the East Lake, Wuhan, China

武汉市东湖周边近地表土壤磁化率特征及其环境意义

The three environmental trends —— the shortage of fresh water, the loss of topsoil and the rising temperatures —— are making it increasingly hard to expand the world's grain supply fast enough to keep up with demand.

当前的三大环境趋势——淡水资源短缺、表层土壤流失和气温不断上升——使得加速扩大粮食供应以跟上需求越来越难。

NPM separately increases hydrolysable N, aminoacid N and amino sugar N in topsoil by 192.58 mg/ kg, 223.44 mg/ kg and 25.66 mg/ kg, but ammoniacal N content is decreased.

NPM处理土壤耕层水解总氮与对照相比增加192.58mg/kg、氨基酸氮增加223.44mg/kg、氨基糖氮增加25.66mg/kg，而氨态氮含量则大幅度降低；