What line of work are you in? <a href=" http://www.clearofclouds.ch/rfid-attendance-system-thesis/#disable ">dissertation abstracts database</a> First author Sarah Batterman, a postdoctoral research associate in Hedin's research group, said legumes, or nitrogen fixers, are especially important for forests recovering from agricultural use, logging, fire or other human activities. The researchers studied 16 forest plots that were formerly pasture and are maintained by the Smithsonian Tropical Research Institute (STRI).