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Peer-reviewed Article

Diagnosing potassium deficiency by soil analysis


A. L. Brown, Agricultural Experiment Station
James Quick, Agricultural Extension Service and Gerard
Gerard J. De Boer, University of California

publication information

California Agriculture 27(6):13-14. June 1973.


Soil analysis, especially nitric acid extraction of potassium appears to be a very useful means of diagnosing potassium-deficient soils in California. Studies reported here compared two analytical methods for determining soil potassium levels. Plant growth responses were determined by greenhouse pot tests.

author affiliations

A. L. Brown is Lecturer and Specialist in the Agricultural Experiment Station; James Quick is Agriculturist, Agricultural Extension Service and Gerard; J. de Boer is Staff Research Associate. University of California Davis;