00648naa a2200181 a 450000100080000000500110000800800410001910000140006024501930007426000090026765000170027665300270029365300250032065300200034570000140036570000210037977300660040020182992015-06-22       2014    bl uuuu     u00u1 u    #d1 aBOENI, M.  aOrganic matter composition in density fractions of Cerrado Ferralsols as revealed by CPMAS 13C NMRbInfluence of pastureland, cropland and Integrated crop-livestock.h[electronic resource]  c2014  aspectroscopy  aPhysical fractionation  aSodium polytungstate  aSoil use system1 aBAYER, C.1 aMACEDO, M. C. M.  tAgriculture, Ecosystems & Environmentgv.190, p. 80-86, 2014.