Biochar may not be the miracle soil additive that many farmers and researchers hoped it to be, according to a new University of Illinois study. Biochar may boost the agricultural yield of some soils—especially poor quality ones—but there is no consensus on its effectiveness. Researchers tested different soils' responses to multiple biochar types and were unable to verify their ability to increase plant growth. However, the study did show biochar's ability to affect soil greenhouse gas emissions.
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