undisturbed ground

Spatiotemporal variation of land disturbance on large opencast coal mine area;

大型露天煤矿区土地扰动的时空变化

This paper reviews four aspects of land application of sewage sludge including agricultural application ,forest application,horticultural application and amending damaged soil.

阐述了污泥土地利用的几个主要方面 :农田利用 ;林地利用 ;园林绿化利用 ;严重扰动土地的改良 。