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The roots of trees are of primary importance in preventing soil erosion, because they physically hold the soil in place, and also because they transport water up from the ground, thus supporting other plants and preventing salinisation of the soil.

The leaf canopies are also important for soil conservation, because they shelter the soil and smaller plants from the drying effects of sunshine and wind and the erosive effects of wind and heavy rain.

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Q: Which part of trees help in preventing soil erosion?
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