Non-traditional equipment is tested for harvesting small trees as an energy crop. The red attachment is a sheer felling head, and allows the skidsteer to accumulate several small stems at a time. Photo by Dana Mitchell, U.S. Forest Service.
Woody biomass includes stems, small branches, treetops, needles, leaves, and sometimes the roots of trees and shrubs. These materials are byproducts of forest management activities such as thinning, but they can also be a valuable source of bioenergy.
Five U.S. Forest Service Southern Research Station (SRS) scientists – John Stanturf, Emile Gardiner, Leslie Groom, Dana Mitchell and James Perdue – recently contributed to four review articles that were part of a special issue of the journal BioEnergy Research. SRS researchers collaborated on the journal articles with scientists and engineers from a number of universities and other agencies, including the Forest Service Northern Research Station, Pacific Northwest Research Station, and Forest Products Laboratory, as well as the USDA Agricultural Research Service and Natural Resources Conservation Service.