Desert control of Hexi corridor has representative significance in desert areas of northwest China.

河西走廊的防沙治沙在我国西北沙区具有一定的代表性。

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The main problems of desert control in practice are follows: (1) It is not clear about the suitable extent for desert control with plants.

治沙措施的应用在实践中表现出来的问题主要是：①植物治沙的适用范围不清，提取地下水造林成为生态环境继续恶化的因素之一；

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All subjects need experiment. In every experiment there is different degree error, it is the same to the forestry and desert control subject.

各门学科都离不开实验，一切实验都有不同程度的误差，对于林业和治沙学科更是如此。

youdao

Mali's March 22 coup precipitated the fall of the country's north to a mix of secular and Islamist rebels, who now control a desert region the size of France at the heart of the Sahara.

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France says its troops will start pulling out of Mali in March, and hand over control of the vast northern desert area to African forces.

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