島根農科大学研究報告

Shimane Agricultural College

ISSN:0559-8311

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島根農科大学研究報告 9

1961-03-31 発行

島根県耕作地土壌の理化学的性質

Some physical and chemical Properties of the Farm Soils in Shimane Prefecture

Misu, Hideo

Koshiba, Naohiro

Sano, Yutaka

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d0020009n022.pdf 2.82 MB

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Some physical and chemical properties of the farm soils in Izumo district, were measured and the average results are as follows :
1. Mechanical analysis :
<tt>
──────────────────────────────────────────
Soils │ Coarse Sand │ Fine Sand │ Silt │ Clay │ Siol Class
━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━
Paddy │ 28.28 (%) │ 30.04 (%) │ 19.61(%)│ 20.18(%)│ Sandy loam
──────────────────────────────────────────
Field │ 28.61 (%) │ 23.87 (%) │ 17.98(%)│ 29.67(%)│ Loam
──────────────────────────────────────────
</tt>
2. True specific grayity :
Paddy soils 2.51
Field soils 2.61
3. Apparent specific gravity :
Paddy soils 1.06
Field soils 1.12
4. Porosity :
Paddy soils 57.98%
Field soils 57.39%
5.Water capacity :
Paddy soils 51.62%
Field soils 45.97%
6.Total nitrogen :
Paddy soils 0.91%
Field soils 0.91%
7. Humus :
Paddy soils 3.37%
Field soils 4.01%
8. Exchange acidity (y_1) :
Paddy soils 3.80
Field soils 4.87

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d0020009n022.pdf 2.82 MB

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