Effect of Charcoal Quantity on Microbial Biomass and Activity in Temperate Soils Kolb, Simone E. ; Fermanich, Kevin J. ; Dornbush, Mathew E. Abstract Publication: Soil Science Society of America Journal Pub Date: 2009 DOI: 10.2136/sssaj2008.0232 Bibcode: 2009SSASJ..73.1173K