30 Years of Nitrogen Fertilization in Spruce-Fir Forest

Rocks and sediments bind up almost 98 percent of all nitrogen. The remaining 2 percent is in motion, part of a global chemical cycle that includes humans, bacteria, plants, and the atmosphere. “Plants need nitrogen to grow,” says U.S. Forest Service research ecologist Steve McNulty. “However, excess nitrogen can harm plants.” Nitrogen and sulfur can…  More 

Mount Ascutney Visitors Enjoy the View and Learn Something, Too

Over the past decade, countless visitors on southeastern Vermont’s Mount Ascutney have read the words on two interpretive panels describing ongoing research that began as a graduate student’s research project there. Through the years, the panels have faded and weathered, but now they are new again after U.S. Forest Service researchers installed updated replacements in…  More 

After the Acid Rain

“Rain has become much less acidic since the Clean Air Act was strengthened in the 1990s,” says U.S. Forest Service Southern Research Station (SRS) soil scientist Jennifer Knoepp. “However, some high elevation streams still have chronic or episodic acidity.” Acid rain, as well as other forms of acidic deposition such as acid fog and acid…  More 

Jennifer Knoepp Named Soil Science Society of America Fellow

U.S. Forest Service scientist Jennifer Knoepp was recently selected as a Soil Science Society of America (SSSA) Fellow for 2014.  Fellow is the highest recognition bestowed by SSSA, an international scientific society whose more than 6,000 members are dedicated to advancing the field of soil science and fostering the transfer of knowledge and practices to…  More 

Future Wilderness Area Benefits from Clean Air Act

A newly published report by the U.S. Forest Service Southern Research Station shows that soil conditions in two Western North Carolina wilderness areas will keep improving over the next century as a result of continued reductions in air pollution resulting from the implementation of the Clean Air Act and other ongoing air pollution emission reductions.…  More