Framework / Assessment New Hampshire Forest Resources Plan Revision -- Assessment 2010 Summary The US Forest Service (USFS) plays a key role in forestry and forest ecology in the US. The research arm of the USFS is a trusted entity by manyThe US Forest Service (USFS) plays a key role in forestry and forest ecology in the US. The research arm of the USFS is a trusted entity by many involved in often contentious discussions about forestry. involved in often contentious discussions about forestry.