土質改良剤に関する研究(第1報)

概要

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1. The amounts of water stable aggregate of various soils treated with several so-called soil conditioners (Krilium, Aerotil, C.M.C. etc.), humic acid and lignin were estimated. These soil conditioners formed considerable amounts of aggregate and their abilities varied with the soils. Humic acid and lignin were ineffective for aggregate formation. (Table 1.) 2. Between the treatment of soil with N/100 HCl, N-NaCl, N-CaCl_2 or 6% H_2O_2 and formation of water stable aggregate by soil conditioners no specific relation was observed. (Table 2.) 3. The aggregate was formed increasingly with the increased addition of soil conditioners, but when the addition exceeded more than 0.5% the formation was observed to decrease in some cases. (Table 3,4.) 4. When Uji soil treated with aerotil was air dried the quantity of aggregate was decreased than held in wet chamber. On the other hand, in the case of C.M.C. an increase was observed. No change was observed in the case of A-22 (one of the Napolyacrylate products.). (Table 5,6.) 5. The favourable quantity of water to dissolve soil conditioner was about 90 per cent of water capacity of the soil. (Table 7.)
社団法人日本土壌肥料学会の論文
1953-10-01