SOME ASPECTS ON WATER REPELLENCY OF SOILS

概要

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The changes of water repellency of soils, such as peat soil and volcanic ash soil, were measured with the one water drop method. Bibai peat soil and A_0 or A_1 horizons of the forest soil were difficult to wet when they were dried at 105℃, and it became wettable when it was heated to temperatures above 250℃. The peat soil heated to 200℃ was wettable when the puddled soil was shrinked and dried, on the other hand it was nonwettable when it was crushed or sieved. By heating to temperatures above 250℃, all samples became completely wettable. Bibai peat soil was more nonwettable when it was treated with hydrogen peroxide. It was also found that forest soil was more nonwettable than the cultivated soils even if the organic matter content of both soils were nearly equal.
社団法人日本土壌肥料学会の論文