在多孔土壤，例如，低流量灌溉不会蔓延到覆盖整个根系。
In porous soils, for example, low flow irrigation won't spread to cover an entire root system.
相比之下，干燥的土壤是沙质和多孔的，其粗糙的质地允许了水分的迅速流失。
By contrast, dry soils are sandy and porous, their coarse textures permitting water to drain rapidly.
大部分土壤和岩石都是多孔的。
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