大阪中河内地区の堆積層序とその土壌

概要

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記事区分：原著The character of soil horizon sequences was studied in relation to the past and present surface of the soil. The soil horizon sequences at sampled locations showed the processes of soil accumulation, but each soil layer accompanies the action of soil formation at the surface of the ground. Plain formation by an alluvium shows a shallow underground water level, and is piled up in reductive soil according to each period and the microconfiguration on the ground. In the soil horizon sequences, the content of organic matter in layers of oxidative soil was low, and iron was seen as a reddish mottling. In reductive layers, organic matter decomposed slowly, so the content of organic matter was high. The iron content was the same as in the oxidative layer. The mean phosphate content of the soil samples reseached were 34% of the mean value for farm lands in Japan, and the phosphate and iron concentrations were correlated. The fertility of buried field soils that had been used from the Yayoi to the Edo period for rice culture was comparable to that of present paddy field soil. From these results, it seems likely that manure in early rice culture of Tanan had been practised.
近畿大学の論文
1992-03-15