JEQ -- Chaudri et al. 30 (5): 1575 Figure IG1

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Fig. 1. Relationship between total soil Cd and (a) soil pore water soluble Cd and (b) soil pore water free Cd²⁺. (c) Relationship between soil pore water soluble Cd and soil pore water free Cd²⁺. Treatments: ${circ}$ no-sludge control, ${square}$ uncontaminated control sludge, ${triangleup}$ Zn-sludge, ${triangledown}$ Cu-sludge, ${diamond}$ Ni-sludge, ${blacktriangleup}$ Cr-sludge.