色素混合液よりする土壌の色素吸収

概要

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One gram of soil was added with 100 c. c. of the mixed dye solution, containing methylene blue and acid fuchsin. After settled 48 hours, occasionally shakend, three c. c. of supernatant liquid was applied to electrophotometer. Transmittances of the liquid were determined respectively by the use of six mono-chromatic lights from purple (400 mμ) through blue (410 mμ) and etc. to red (680 mμ) (see Table 1). Of transmittances, the inclination was as follows : 1) of soils, low in SiO_2/Al_2O_3 or of so-called volcanic ash origin, transmittances decreased toward red side from purple side. 2) of soils, high in SiO_2/Al_2O_3,transmittances increased toward both sides red and purple from yellow area. Of soil types. Brown forest soil had the inclination of 1), while Reddish brown soil, designated tentatively by Kamoshita, had that of 2).
1954-03-05