THE MOVEMENT OF SALTS, AND THE EFFECTS ON CEREAL YIELDS RESULTING FROM THE APPLICATION OF POTASSIUM REFINERY DUST TO THE SOIL SURFACE

1 February 1974

journal article
Published by Canadian Science Publishing in Canadian Journal of Soil Science

Vol. 54 (1) , 45-51
https://doi.org/10.4141/cjss74-006

Abstract

Potassium mine refinery dust at rates from 1.12 to 11.2 ton/ha (½ to 5 ton per, acre) was applied to a Dark Brown Chernozemic silt loam and to a Black Chernozemic loam. Under dryland farming conditions, no significant effects on yields of cereal grains have been recorded. After 5 years there is no indication that any K has moved deeper than 46 cm (18 inches). The chlorides have been removed from the surface soil and about 50% have leached to below 213 cm (7 ft). The K replaced some of the exchangeable Ca and Mg which were subsequently leached to lower depths. Much of the added K is now in the exchangeable form; some may have become fixed in the clay lattice.

Keywords

POTASSIUM

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