Table 1.

Mean metal concentrations in the Luddington soil

TreatmentMean concn (mg kg of dry soil−1) ofa:
Uncontaminated sludge1866120.2216
No sludge2467120.2321
Low Cu125*145*170.54*48*
High Cu282*222*210.85*81*
Low Zn20207*130.36*25*
High Zn26359*130.56*38*
Low Ni30150*69*0.55*51*
High Ni29167*89*0.51*50*
Mean SE5.624.
  • a Asterisks indicate significant difference from the uncontaminated-sludge treatment (n= 4, P < 0.05; mean SE from ANOVA).