تلخیص
Copper (Cu) deficiencies are common in calcareous soils. We investigated the adsorption ofCu by a range of Calcareous soils at low solution concentrations Sorption of Cu at <0.5 fjM solution concentrations, was inhibited by the formation of soluble Cu organic complexes in aqueous solution as indicated by S-Curve isotherms. The Calcareous soils with relatively high organic matter and high iron and manganese oxides exhibited lower solution copper activity (Cu2
*). At low Cu concentrations organic complexation. played a domi- ..
nant role in regulating the concentration of soluble Cu in calcareous soils. Thus, in calcareous soils it is the Cu2+ activity which is more important than total solution Cu. for plant uptake. Further studies are waranted to explore the solution chemistry of copper in calcareous soils.
Muhammad Bashir Chaudhri*, D.L. Rowel!** prog . (1993) ADSORPTION OF COPPER IN SOME CALCAREOUS SOILS AT LOW EQUILIBRIUM SOLUTION CONCENTRATION, The Journal Soil & Environment , Volume 8, Issue (1-2).
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