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Response of Soil Microbiological Activities to Cadmium, Lead, and Zinc Salt Amendments

^a Institute of Soil Science and Plant Cultivation, Pulawy, Poland
^b Environmental Quality Laboratory, Building 007, Room 202, BARC-West, Beltsville, MD 20705

View larger version (18K): [in a new window]   Fig. 1. Relationships between (A) organic matter and increases in CaCl2–extractable Zn, (B) organic matter and change in soil pH, and (C) soil pH and increases in CaCl2–extractable Zn for soils amended with Zn.

View larger version (30K): [in a new window]   Fig. 2. Ranges in response of biological activities (inhibition or stimulation) for Cd-, Pb-, and Zn-amended soils. The whiskers represent the 10th and 90th percentiles, boxes the 25th and 75th percentiles, and solid lines the mean.

View larger version (21K): [in a new window]   Fig. 3. Relationship between change in pH and biological activity response in Cd-, Pb-, and Zn-amended soils.