In Wisconsin lime recommendations are based on soil pH, organic matter and SMP buffer pH. The SMP buffer pH does not contribute significantly to the lime recommendation for a soil. Additionally, the SMP buffer contains potassium chromate which poses a health risk to laboratory technicians and creates a problem for waste disposal. For these two reasons, alternate buffers were evaluated to improve the lime recommendation and increase safety.
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See more of The ASA-CSSA-SSSA International Annual Meetings (November 6-10, 2005)