アルミニウムの定量法及宇治地方茶園土壌の水溶性アルミニウムに就て

概要

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1. The present authors made several experiments on the determination of alumina in small quantity and found that aluminon method by WINTER etc. is the best and applicable to soil extract. 2. It was found by the above method that the tea garden soil in Uji-district contains remarkable water soluble alumina and that it has an intimate relation with pH of the extract. When the pH of the extract is smaller than 3.5,it is remarkable but with the increase of the pH, it decreases rapidly and is nearly zero or trace at pH 4.9 or more. In average, the pH of Uji-soil is 3.5 to 4.5 and the quantity of soluble alumina is 1 to 4. p. p. m. 3. It was also determined that pH is smaller in surface soil than in subsoil and that ruined tea garden soil has smaller pH than normal. The quantity of water soluble alumina in the soil shows a reverse relation with its PH value.
社団法人日本土壌肥料学会の論文
1935-06-20