由于岩石边坡缺土、缺水、缺肥，生态条件十分恶劣，因此在岩石边坡上栽树、种草的难度相当大。
Because of the lack of soil, water, fertilize and hard ecological conditions in rock slope, there are lots of difficulties when planting trees or grasses on the slope.
因此，以疏浚污泥作为生活垃圾填埋场覆盖土，可同时解决平原型填埋场缺土和疏浚污泥的最终出路问题。
So this sort of use can not only solve the problem of lackings of soil for a plain type landfill, but also make a way out for the dredging silt.
缺镁常常发生在中雨量或高雨量区的酸性砂质土。
Magnesium deficiency most commonly occurs in acid, sandy soils in areas of moderate to high rainfall.
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