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ID 70
Eprint ID
70
FullText URL
Title Alternative
A Study on Polder Soils in Japan : XII. On the Young Polder Soils of the East Fukuda Polder in Okayama Prefecture.
Author
Kochi, Tomomichi
Yoneda, Shigeo
Abstract
The purpose of this paper was to study the effects of iron sulfides which had been formed in marine deposits under an anaerobic condition on the chemical compositions and the soil forming processes of soils in East Fukuda Polder. These polder soils examined contained a large amount of soluble salts; especially chlorides constituted the dominant salt among them. Sulfates content was also high and soluble salts appeared to accumulate in surface layers. Air-dried surface soils showed fairly strong acidities, due to the presence of soluble acid compounds formed in the course of oxidation of iron sulfides contained in these soils. The content of FeS2 was found to be between 0.305% and 1.682% as SO3 in the original soils ; and 10% HCl sol. CaO contents were very poor. Soil reactions and soluble salts were determined after the incubation of soils during several weeks at 30℃ under the condition of the moisture content of field capacity. Consequently, in all soils, the pH value became extremely acid, and total solids and water soluble sulfates were greatly increased in the incubated soils; and a relatively good correlation was found between decreased pH values and increased sulfates contents in the incubated soils. It has been concluded that iron sulfides had a marked influence on the chemical compositions of soils and on the prospective soil forming processes of these polder soils.
Published Date
1957
Publication Title
岡山大学農学部学術報告
Publication Title Alternative
Scientific Reports of the Faculty of Agriculture Okayama University
Volume
volume10
Issue
issue1
Publisher
岡山大学農学部
Publisher Alternative
Faculty of Agriculture, Okayama University
Start Page
11
End Page
18
ISSN
0474-0254
NCID
AN00033029
Content Type
Departmental Bulletin Paper
language
日本語
File Version
publisher
Refereed
False
Eprints Journal Name
srfa