David Yarrow and the folks at Four Oaks Community Farm in Topeka, Kansas, are making some exciting strides towards an efficient small-scale TLUD (Top-Lit Updraft) biochar stove. They’ve done 6 experimental test-burns thus far, and are learning more with each one.  Biochar is produced through a controlled process of heating up biomass in a lo/no oxygen [...]

Project is for: Farmers who need a flexible, multi-purpose, cultivating tool–  most likely vegetable farmers. Range of cost: $750 – $1500 Skills needed: Simple metalworking (welding steel, or finding someone who can);  also available commercially with an Allis G belly mount from Roeter’s Farm Equipment, but their version may not be optimized for your application. [...]