Biochar is a stable form of recalcitrant carbon created by heating biomass in a low or no oxygen environment. When used as a soil amendment, biochar forms a dynamic substrate which provides numerous benefits, including increasing nutrient availability, increasing soil water retention, improving crop yield, and sequestering carbon for hundreds to thousands of years. However, biochar\u27s effectiveness largely depends on the biomass feedstock and the soil to which it is applied. Individual biochars made from different feedstocks perform differently against each other, and the magnitudes of their effects can be dependent on many factors within the soil. Testing different feedstocks under different soil conditions is needed in order to gain a full picture of the potential of biochar.
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