Add 1.5% Biochar to a 3.5% SOC Soil And Wait 9 Years.

Add 1.5% biochar to a 3.5% (0-100mm sampled) soil organic carbon soil, wait 9 years and it begins to positively prime. Clearly they didn’t add enough to reach a tipping point faster, or compost it. I assume it was surface applied as the study is paywalled.

Screenshot from 2017-05-21 07-29-17

Paywalled: Biochar built soil carbon over a decade by stabilizing rhizodeposits : Nature Climate Change : Nature Research

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