Discussion
The method of plantation of high water-consuming trees like Eucalyptus, Casuarina and Acacia for withdrawal of groundwater is termed as-
Answer: B
The method is Bio-drainage.
Bio-drainage uses deep-rooted, fast-growing trees that transpire large amounts of water, such as Eucalyptus, Casuarina and Acacia, to pump groundwater out of waterlogged land through their roots and leaves. It lowers the water table without channels or pumps.
Mole drainage forms unlined channels in clay subsoil with a mole plough. Tube drainage uses perforated pipes, and gravity drainage relies on surface or subsurface flow by gravity. None of them uses trees.
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