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The ecological toxicity of cadmium (Cd, 10 mg kg−1 of dry weight soil) and butachlor (10, 50 and100 mg kg−1 of dry weight soil) in both their single and combined effects on soil urease and phosphatase was studied after 1, 3, 7, 14, 21 and 28 days exposure under controlled conditions in paddy and phaeozem soils. The results showed that Cd reduced the activities of urease and phosphatase at early incubation...
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