Abstract

The extractability of exchangeable and reactive aluminum by 0.5M KCL, IM NH4OAc,) 0.33 LaCI3 and 0.5M CuCI2 from surface and sub-surface soils of Niger Delta of Nigeria decreased with the order of effectiveness as shown:Cu2+>La3+>NH+4>K+. The amounts of CuCI2-AI were significantly higher (P

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