Fig. 2From: Heavy metal remediation in soil with chemical amendments and its impact on activity of antioxidant enzymes in Lettuce (Lactuca sativa) and soil enzymesHeavy metal concentration in the crop and fresh weight of lettuce (Lactuca satva) after 30 days of treatment. 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