00597nam a2200205 a 450000100080000000500110000800800410001910000170006024500650007726001070014265000130024965000160026265000090027870000130028770000170030070000210031770000150033870000160035370000220036919571652022-12-05       2006    bl uuuu     u00u1 u    #d1 aCOSTA, J. A.  aGeochemistry of dark earth Amazonian.h[electronic resource]  aIn: WORLD CONGRESS OF SOIL SCIENCE, 18., 2006, Philadelphia. Abstracts... Madison: ASA-CSSA-SSSAc2006  aAmazonia  aGeoquímica  aSolo1 aKERN, D.1 aCOSTA, M. L.1 aRODRIGUES, T. E.1 aKAMPFM, N.1 aLEHMANN, J.1 aFRAZÃO, F. J. L.