Contact: Roland Giller
USDA Forest Service - Pacific Southwest Research Station
Caption: Janis Haraguchi, an Institute of Pacific Islands Forestry biologist, measures the diameter of an Acacia koa tree. Haraguchi and other US Forest Service scientists found the stem diameter of koa trees with timber potential doubled through a combination of treatments that included thinning, herbicides and fertilizers.
Credit: U.S. Forest Service
Usage Restrictions: None
Related news release: Faster koa tree growth without adverse ecosystem effects