00488nam a2200133 a 450000100080000000500110000800800410001910000250006024501220008526000980020730000110030565000240031665300140034018422882005-10-11       2001    bl uuuu  m   00u1 u    #d1 aESCOSTEGUY, P. A. V.  aExchangeability and formation constant of copper, zinc and cadmium with humic substances at indigenous concentration.  aDissertation (Doctor of Philosophy in Soil Science) - University of Wisconsin, Madison.c2001  a196 p.  aFertilidade do Solo  aModelagem