How can woody material for fuel be sustainably produced?

Commercial Production of Tree Energy Crops
Increasing Plantation Biomass Availability
State and Federal Forest Policies
Landowner Practices and Biomass Availability in Northern Forests
Understanding Forest Residue Recovery and Sustainability
Chemical and Thermal Properties of Poplar and Willow
Environmental Impacts of Woody Biomass Plantations
Improving Yields of Poplar and Willow Energy Plantations