The test of grazing of different intensity indicated that the grazing intensity had different influence for water content in soil top layer, vegetation characteristic, and sheep increasing weight.

通过不同强度的放牧试验表明，不同的放牧强度对土壤表层含水量、植被特征和绵羊增重都有程度不同的影响。

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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。

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A top dressing of fertilizer should be added to improve growth as mint impoverishes the soil quickly.

应施顶肥以促进生长，因为薄荷会使土壤迅速变得贫瘠。

《柯林斯英汉双解大词典》

There should be about one centimeter of space between the soil and the top of the container.

VOA: special.2010.10.12

Farmers may keep the remains of maize or other crops on top of the soil.

VOA: special.2009.06.30

A piece of sod has grass on the top and soil on the bottom.

VOA: special.2009.07.07

George W. Bush had made the protection of American citizens and the prevention of future terror attacks on U.S. soil his top priority.

MSN: Read an excerpt of Joe Scarborough's new book

It's been sold to the developer so they can use the open space to park JCBs on, dump top soil, brick piles, things like that.

BBC: By Richard Haugh

More importantly, the meat from which I source also contributes to the building and replenishment of top soil, ie pastured animals on small farms that eat much closer to a natural diet, are thoughtfully managed, and raised by people who are passionate.

FORBES: Why Butchers Are Sexy And Cutting Meat Is An Art Form