black top soil 暗色表土
compact top soil 紧凑型顶土 ; 协约上土壤 ; 压缩层土壤
tilth top soil 耕层 ; 熟化土壤
top soil plow 表土犁
top soil erosion 表土侵蚀
top soil pollution 表层土污染
sub-top soil 亚表层土壤
N-UNCOUNT Topsoil is the layer of soil nearest the surface of the ground. 顶层土
However, plowing is blamed for causing severe damage to top soil by removing the plants that protect soil from being blown or washed away.
然而，耕地被认为是对表层土壤造成严重损害的罪魁祸首，因为它清除了那些保护土壤不被吹走或冲走的植物。
Heavy rain can quickly wash away the rich top soil on flat, open land.
飘泼大雨能很快地冲走那里的平坦开阔的表层土壤。
Jonathan Lynch: For some nutrients like phosphorous which are in the top soil, we want shallow roots.
纳森•林奇：为有效吸取表土磷等营养物，浅根更适合。
The land became so dry that wind easily blew away the top soil.
VOA: special.2010.06.13
Some gardeners prepare an area by removing the existing top soil and grass.
VOA: special.2009.07.07
There should be about one centimeter of space between the soil and the top of the container.
VOA: special.2010.10.12
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