This document summarizes the peer-reviewed evidence on how biochar changes two
linked soil properties central to irrigation efficiency: water retention (how much water the
soil holds and how much of it plants can use) and water movement (how quickly water
infiltrates, redistributes, and drains). It emphasizes where the effects are strong, where
they are weak or absent, and what governs the difference, so that the science can be
matched honestly to field decisions.
Biochar Effects on Soil Water Retention and Water Movement
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