MATERIAL REMOVED BY JEFFRIES' MAGNESIUM-RIBBON-POTAS-SIUM-OXALATE METHOD FOR CLEANING SOIL PARTICLES

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Abstract
In 1946, Jeffries proposed a method using magnesium ribbon and a potassium oxalate-oxalic acid buffer soln. for cleaning soil particles for the identification of soil minerals. Little information has been published to show what quantities of silica, alumina and iron oxide may be removed by the treatment. Results are presented from 51 soil samples, representing the horizons of 6 profiles, 2 each from the grey-brown podzolic, brown podzolic and brown forest soils. When high values for one horizon were omitted, the range for SiO2 removed was 0.09 to 0.59%, for Al2O3,0.25 to 2.15% and for Fe2O3,0.26 to 3.11%. P was detd. for one brown forest profile on the solns. obtained by treating the soil with H2O2 and subsequently by Jeffries'' procedure and on the residual sand, silt and clay fractions. Most of the P was found in the solns. and in the sand fractions. The P content of the clay fractions was low.

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