土壌調整剤に関する研究(第2報)

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Previous research with Aerotil has shown that this chemical stabilized soil aggregates under water-logged condition. The purpose of this study was to compare the effectieveness of this chemical in the following two cases : A) The water is percolating through soil column. B) The water is logged still. The results were as follows : 1) The soil column treated with Aerotil in glass cylinder, 5cm in diameter and 20cm in height, was separated into three layers for determing moisture content, moisture equivalent and water stable aggregate. The results showed that their values increased with the cocentration of this chemical. (Table 2). 2) The water percolation rate through the soil column, treated with 0.4% of Aerotil, increased about five hundred fold over untreated soil at the beginning of experiment, but became to decrease and constant after 2 days, and the soil volume ceased to decrease. (Fig. 1 and Table 4). 3) The results of both experiments above mentioned showed that the formation of water stable agregates by this chemical were the same in both cases, so these aggregates were fairly stable under water-logged condition. (Table 3 and 5). 4) The increase of water stable aggregates was directly related to the increased application of Aerotil, for the treatment of Aerotil caused the soil to increase its aggregate > 10 mesh in diameter and to decraease the smaller particles. (Table 3,5 and Fig. 2). 5) The water stable aggregates in paddy soils : remained essentially unchanged during 5 weeks. (Table 7). 6) These data induced the conclusion that the stabilized aggreagation by the treatment of soil conditioner under water-logged condition would be durable for some period.
社団法人日本土壌肥料学会の論文
1956-08-05

土壌調整剤に関する研究(第2報)

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