In this project we study dynamics of soil C in the eastern deciduous forest region. Millions of acres of formerly agricultural sites have reverted to forest in this region. We sampled associated native forest, present agricultural sites and reforested plots to determine total C and N storage. Acid hydrolysis in conjunction with 14 C dating is used to determine the resistant old soil C pool. A differentiation between POM within versus between aggregates is made.
Decision making involves information on past and future effects of various management scenarios.
We use the data base from our sites and the improved Century model to predict realistic effects of management on future soil C and CO 2 levels. These include effects of tillage, decreased fallow, CRP land, cover crops, increased crop residues and roots from higher yielding crops attributable to fertilization, improved genetics and higher CO 2 . From this we can make much better predictions to be used by decision makers responsible for possible mitigation options. Funded by the Department of Energy.