Role of Soil Iron Nodules/Concretions in the Soil Carbon Cycle
Presenter - Christophe Moni, Post Doc, Oregon State University
Monday, September 29, 2008 4:00 PM - 5:00 PM
Abstract: Soil nodules are indurate bodies formed by the accumulation of iron and manganese oxides as a result of periodic changes of the soil redox potential. However, even though nodules are common
soil features, they are partly excluded by conventional soil analysis that rejects coarse element > 2mm and the nature of associated OC, as well as, their ability to store substantial amounts of
OC has seldom been investigated. Our results show that organic carbon associated with iron nodules could represents a significant amount of the total soil organic matter and display an extremely high
turnover time.
