Amorphous Materials of Andosols (Kuroboku) in Japan

JARQ : Japan Agricultural Research Quarterly
ISSN 00213551
書誌レコードID(総合目録DB) AA0068709X
本文フルテキスト

 With reference to the amount of amorphous materials of the selected soils, it is summarized that Andosols (Kuroboku soils) in Japan may be divided into three groups: 1) soils that have the amount of amorphous material of more than 20% on the oven-dry basis, and more than 50% in the clay fraction, deriving from wind-blown volcanic ash, 2) soil that have more than 10% on the oven-dry basis, and more than 20% in the clay fraction, deriving from ash influenced or redeposited and/or from wind-blown volcanic ash with well developed soil profile, and 3) soils that have less than 5% on the oven-dry basis, but more than 85% in the clay fraction, deriving from young coarse textured volcanic material.
 Phosphorus absorption coefficients ranged from 15.00 (3440) to 9.90 (2270) P mg/g (P2O5 mg /100 g) except for young coarse textured horizons, and it seems not directly related to the amount of amorphous material.

刊行年月日
作成者 KANJI KAWAI
オンライン掲載日
国立情報学研究所メタデータ主題語彙集(資源タイプ) Journal Article
12
3
開始ページ 132
終了ページ 137
言語 eng

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