Kinetics of the hot water soluble boron soil test

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Abstract
A first order reversible reaction rate equation was modified to fit the conditions of the hot water soluble boron soil test. This equation was fitted to a boiling time study on one soil fertilized to three different boron levels. The common S‐minute boiling time did not remove enough boron to reach the plateau region of the fitted curve for any sample. It was also found that boiling for too short a time causes more error than excessive boiling. For these samples a boiling time could be more than a minute too short before a 10% error was introduced in the amount of boron extracted. A 10‐minute boiling time would reduce the timing error for these samples by removing enough boron to reach the plateau region of the extraction curve.

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