島根大学農学部
ISSN:0370-940X
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島根大学農学部研究報告 22
1988-12-21 発行
牧草栽培による干拓地の土壌構造の変化 : 安来地区の事例
Change of Soil Structure in Drained Area by Grass Culture : Study Case in YASUGI Resion
福桜 盛一
今尾 昭夫
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内容記述（抄録等）
In order to clarify the index of a maturation of plow layer soil of drained area by the method of civil engineering, the change of soil structure(ped and void of soil) caused by grass culture was investigated in YASUGI region of NAKAUMI drained area.
The results obtained are as follows :
1) The change of structure of soil ped by grass culture is showed in the subdivision of ped structure, namely, coarse peds(25-10mm) are reduced and fine peds(under 5mm) increase as compared with the soil left as it is.
2) The change of structure of void is showed in the reduction of the gross volume of void, namely, coarse void(pF1.8-0) decreases and fine one(above pF4.0) increases.
3) These tendency are recognized more conspicuously in fine(clayey) soil.
The results obtained are as follows :
1) The change of structure of soil ped by grass culture is showed in the subdivision of ped structure, namely, coarse peds(25-10mm) are reduced and fine peds(under 5mm) increase as compared with the soil left as it is.
2) The change of structure of void is showed in the reduction of the gross volume of void, namely, coarse void(pF1.8-0) decreases and fine one(above pF4.0) increases.
3) These tendency are recognized more conspicuously in fine(clayey) soil.
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