Fig. 4From: Heavy metal remediation in soil with chemical amendments and its impact on activity of antioxidant enzymes in Lettuce (Lactuca sativa) and soil enzymesSoil enzyme activities in each treatments a β-glucosidase, b Phosphatase. All value was an average of triplicate measurement and error bar represent standard deviation. Different letters represent statistical difference at the significance of p < 0.05Back to article page