Hypotheses of biochar’s role in the development of fertile soils have become strong arguments in favor of its intentional soil application. However, field research trials demonstrate a range of results that contrast overwhelming yield improvements in some places with neutral or even negative results in other places. The mixture of hype and science has clouded the search for a mechanistic understanding of soil biochar additions. Appreciating the fact that biochar materials produce widely different results depending on soil, climate and type of biochar, the question remains: How does biochar work in soil?
Source: Kelpie Wilson, The Biochar Journal, Arbaz, Switzerland. ISSN 2297-1114
Version of 31 th October 2014