Hydraulic Conductivity and Soil Water Retention of Soil-Biochar Mixtures

We measured hydraulic conductivity and soil water retention of biochar amended sand to better constrain infiltration and understand plant available water. Our results show that Adding up to 6 wt% biochar can decrease hydraulic conductivity (K) by up to 78%; Adding up to 10 wt% biochar can increase field capacity (from 3-12%), permanent wilting point (from 2-8%) and plant available water (from 1-4%); Biochar grain size alters K; however, neither biochar grain size nor pyrolysis temperature have a large effect on plant available water.
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Zuolin Liu
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