Relative resistance of willow and poplar biomass production clones across a continuum of herbivorous insect specialization: Univariate and multivariate Shrub Willow Biomass Producer's Handbook Planting willow with Step Planter 3-year old willow — ready to harvest Harvesting willow with New Holland forage PUBLIC BUILDINGS / ECONOMIC ANALYSIS Willow Park II Community Center . and Electric Company : biomass energy activities , 81 : 6014 PUBLIC UTILITIESpoplar and willow with the production of biomass provides major public health benefits (Donovan et al. Shrub Willow Biomass Producer's Handbook.