@inbook{inbook5c7c301e, title = {Changes in organic matter in an Oxisol from the Central Amazonia forest during eight years as pasture, determined by 13C isotopic composition}, author = {Chone, T and Andreux, F and Correa, J C and Volkoff, B and Cerri, Carlos Clemente}, year = {1991}, publisher = {Elsevier}, journal = {Diversity of Environmental Biogeochemistry} }