Delivery of Hydrologic and Microbial Services by Shrub Rhizospheres to Increase Crop productivity and Stability in the Sahel. Shrubs do hydraulic lift – during night when photosynthesis stops – but water keeps moving up through roots because of low water potential in surface and high water potential in subsoil – so water moves passively through roots because of the structure of roots facilitates faster movement of water then through the soils.
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