Banana Tree Planted in Biochar (IMAGE) DOE/Pacific Northwest National Laboratory Caption A farmer in India demonstrates what he described as vigorous root growth on one of the banana trees he planted in biochar, the black, powdery material in the soil. Credit Rob Bryant, Swansea University Usage Restrictions Credit Rob Bryant, Swansea University License Licensed content Disclaimer: AAAS and EurekAlert! are not responsible for the accuracy of news releases posted to EurekAlert! by contributing institutions or for the use of any information through the EurekAlert system.