Articles written for the GLP list the source as Genetic Literacy Project. All other articles were written for the sources noted with excerpts provided by the GLP.
biocharwheel sjp

Treating nutrient-stripped soil with charcoal made from plants could boost US crop yields 6%

Physics World | 
Farmers in the US can expect to see an increase in crop yield of between 4.7 and 6.4%, on average, ...