01298naa a2200217 a 450000100080000000500110000800800410001902400470006010000170010724501060012426000090023052006260023965000130086565000180087865000140089665000210091070000190093170000210095070000170097177300920098821352302021-10-08       2001    bl uuuu     u00u1 u    #d7 ahttps://doi.org/10.1081/CSS-1200002622DOI1 aBARRA, C. M.  aEvaluation of four aluminum extraction methods using selected Brazilian soils.h[electronic resource]  c2001  aThirty-two soil samples from different locations of the Rio de Janeiro State, Brazil, were studied in order to evaluate the amount of aluminum (Al) obtained by three extractants (1 M KCl, 1 M NH4OAc, 0.5 M CuCl2) and by the extraction of humic and fulvic acids (0.5 M NaOH, following purification). The results were discussed in relation to statistical correlations with soil organic matter content and soil pH (water). In general, the displacement of Al followed the order: CuCl2 &gt NH4OAc &gt KCl &gt humus extraction. The greater amounts of Al extracted by CuCl2 were attributed mainly to Al from soil organic matter.  aAluminum  aSoil analysis  aAlumínio  aAnálise do Solo1 aCURTIUS, A. J.1 aCAMPOS, R. C. de1 aPEREZ, D. V.  tCommunications in Soil Science and Plant Analysisgv. 32, n. 11/12, p. 1969-1980, 2001.