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Humus Composition of the Plow Layers of Paddy Soils in Yamaguchi Prefecture

Bulletin of the Faculty of Agriculture, Yamaguchi University Volume 36 Page 13-20
published_at 1998
Title
山口県下における水田作土の腐植組成
Humus Composition of the Plow Layers of Paddy Soils in Yamaguchi Prefecture
Creators Shindo Haruo
Creators Higashi Toshio
Source Identifiers
The humus cmposition of the plow layers of 15 paddy fields which belong to major soil groups in Yamaguchi Prefecture was analyzed by the method of Kumada and Ohta. The soils, namely 5 gray lowland soils, 3 gley soils, 3 yellow soils, 2 gray upland soils, and 2 brown lowland soils, were used. The results are as follows: 1) No definite relationship was found between the soil groups and the amounts of total humus. However, the degree of humification of humic acids tended to be lower in the gley soils than in the other soils studied. 2) The rations of extracted gumus were free form. 3) The rations of humic acid in extracted humus were around 55% in all soils. 4) Many humic acid showed the combination type of R_P ・ P_O.
Subjects
農学 ( Other)
Languages jpn
Resource Type departmental bulletin paper
Publishers 山口大学農学部
Date Issued 1998
File Version Not Applicable (or Unknown)
Access Rights metadata only access
Relations
[ISSN]0513-1715
[NCID]AN00244250
Schools 農学部