北海道におけるいわゆる重粘性土壌の分類的位置について
スポンサーリンク
概要
- 論文の詳細を見る
The following three kinds of soils have been regarded as the specific soils of Hokkaido, i.e. Volcanic ash soils, Peat soils and Heavy clay soils. But the term of the "Heavy soils" seems to be rather empirical or arbitrary than taxonomical from the pedogenetical point of view. Therefore, the author tried to set a suitable taxonomic situation with these soils, mainly distributed in northern Hokkaido especially along the coast of the Okhotsk Sea. In general, the extraordinally heavy texture, very sticky (when wet) and extreemly hard (when dry) consistency, which characterize these soils practically, could be explained by either the result of pedogenesis or the inherent abundant clay contents of parent materials of these soils. The former reason, however, may not be probable in these soils, because several genetic soil types are included in the so-called "Heavy clay soils", and no specific soil forming process responsible for the creation and the development of aforesaid diagnostic characteristics of these soils, could be found. Then, these "heavy" characteristics may be due to the latter reason, i.e. to the abundant clay contents of parent materials, whether they have been derived from originally clayey terrace deposits or from the ancient weathering crusts which are sporadically preserved on the highest terraces or more older gentle slopes along the coasts of the Okhotsk and Japan Sea. Thus, in order to set a suitable taxonomic situation to the so-called "Heavy clay soils" of Hokkaido, the dualistic, i. e. genetic in higher orders but non-genetic or geographic in lower orders, system of the soil classification as adopted by U.S.D.A., was found to be quite unsatisfactory. While the descending monistic sytem of the genetic soil classification adopted in USSR and the other European countries, could make it possible to give the proper taxonomical situation to the peculier property of the parent materials of these soils, at the category of the soil genus. Accordingly, a unifying scheme of the genetical soil classification was obtained on the so-called. "Heavy clay soils", including their diagnostic charactestic which is very significant both in practical and in taxonomical meanings.
- 日本ペドロジー学会の論文
- 1964-06-30
著者
関連論文
- 33.荒廃草地の更新に関する研究(第1報) : 北海道天北地帯の荒廃草地について(草地の造成管理に関する問題,日本草地学会第7回大会講演要旨)
- 5D・5 ジャモン岩の風化に関する研究(第2報) : ジャモン岩上に発達した褐色土について(土壌の生成, 分類および調査)
- 東天北地域の表層地質と成因的土壌型
- 117 北海道のオーツク海沿岸に発達した古赤色土について(第2報) : 構成鉱物,とくに粘土鉱物組成の特徴について(秋季臨時大会講演要旨)
- 116 北海道のオーツク海沿岸に発達した古赤色土について(第1報) : 土壌断面形態と二三の理化学的性質について(秋季臨時大会講演要旨)
- 1D・10 ジャモン岩の風化に関する研究(第1報) : ジャモン岩上に発達したポドゾール土について(土壌の生成,分類および調査)
- 1D・12 台地土壌の生成論的研究(第3報) : 透水性と土壌の形態的特性の関係について(土壌の生成,分類および調査)
- 1D・11 台地土壌の生成論的研究(第2報) : 母材の特性の影響について(土壌の生成,分類および調査)
- 5D11 台地土壤の生成論的研究 : 第1報 雄武町におけるcatinaの1例(土壌の生成・分類及び調査)
- 想い出(山田忍教授の業績をたたえて,前会長山田忍教授退官記念号)
- 北海道における古赤色土の意義とその問題点(日本の赤色土)
- 北海道におけるいわゆる重粘性土壌の分類的位置について
- オホーツク海沿岸地域に発達した古赤色土(風化殻)について : 第1報 分布と土壌断面形態
- Paleosols in Hokkaido