Small plants requiring shallow soil depths were chiefly selected.

需要较浅土壤的小型植物是首选植物。

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In Australia, a shallow soil is scraped into ridges on which trees are planted.

在澳大利亚把表层土壤作垄，果树栽在垄上。

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Magnetism and hydrocarbon content of shallow soil show interrelated characteristics.

层土壤的磁性与烃含量之间呈明显的相关特征。

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Where stones are scattered in rivers and shallow soil, as in Sierra Leone or Angola, armed rivals are likelier to scrap over them.

ECONOMIST: Botswana

It is true, they say, that tree roots can trap sliding soil but only for shallow landslides of up to a metre in depth.

ECONOMIST: Deforestation and floods