USE OF CERAMIC POINTS FOR THE SAMPLING OF SOIL SOLUTION

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Abstract
A technique for sampling soil solution in situ for analysis of its constituents is described. It is based on the absorption of soil water by porous ceramic points inserted into the soil which are subsequently leached; the leachate is analyzedand the original solute content in the soil solution calculated. The solute tested was nitrate ion. In relatively moist soils a 2-hour insertion period was sufficient to obtain representative samples of soil solution; in relatively dry soils, vapor transfer and chromatographic separation apparently caused discrepancies between solute concentration in the soil and the ceramic. These descrepancies could be minimized by longer insertion period.

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