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Soil Science Society of America Journal Abstract -

Potassium Release Characteristics of Several Soils from Ohio and New York1


This article in SSSAJ

  1. Vol. 21 No. 1, p. 52-58
    Received: Aug 13, 1955
    Accepted: July 9, 1956

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  1. William L. Garman2



Seventeen Ohio surface soils, 25 New York surface soils, and 21 New York subsoils were investigated. Potassium release characteristics were determined by continuous cropping and by four different chemical methods. A continuous leaching method employing the use of 0.01 N HCl gave the highest correlations with continuous cropping. Cumulative amounts of potassium removed by this leaching technique were plotted to produce a family of curves with specific characteristics for each great soil group. A measure of the rate of release of K from structural positions is indicated by the slope of the line drawn between the points plotted from 5 to 10 liters of leachate.

Potassium release from both surface and subsoils followed the order of Brown Forest>Gray-Brown Podzolic>Brown Podzolic>Podzol. The average K concentration in the last 5 liters (10 liters total) of leaching solution from surface soils was as follows: Brown Forest 0.31 ppm., Gray-Brown Podzolic 0.12 ppm., Brown Podzolic 0.05 ppm., and Podzol 0.04 ppm.

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