Extraction and Colorimetric Determinatio
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Douglas, L. A.; Bremner, J. M.
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Article
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1970
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The American Society of Agronomy
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English
β 150 KB
## Abstract A simple colorimetric method of determining urea in soils is described. The soil sample is extracted with 2__M__ KCl containing a urease inhibitor (phenylmercuric acetate), and the extract is analyzed for urea by measurement of the red color formed when an aliquot is heated with diacety