島根農科大学研究報告

Shimane Agricultural College

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島根農科大学研究報告 9

1961-03-31 発行

水田および畑土壌の粒団化度

On the Degree of Aggregation of the Farm Soils

Misu, Hideo

Koshiba, Naohiro

Sano, Yutaka

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We have studied about the degree of aggregation of the paddy and field soils. The results are as follows :
<tt>
1. Average percent aggregate
─────────────────────────
Particle size(mm) │Paddy soils(%) │field soils(%)
─────────────────────────
2.0-1.0 │ 4.08 │ 6.03
1.0-0.5 │ 7.29 │ 8.03
0.5-0.2 │ 14.00 │ 16.43
0.2-0.1 │ 7.87 │ 11.79
─────────────────────────
2. Average stage of aggregation.
─────────────────────────
Lowest particle │Paddy soils(%) │field soils(%)
size(mm) │ │
─────────────────────────
1.0 │ 4.08 │ 6.03
0.5 │ 12.30 │ 14.78
0.2 │ 26.30 │ 31.22
0.1 │ 34.17 │ 42.44
─────────────────────────
3. Average degree of aggregation.
─────────────────────────
Lowest particle │Paddy soils(%) │field soils(%)
size(mm) │ │
─────────────────────────
1.0 │ 4.58 │ 6.57
0.5 │ 13.16 │ 17.28
0.2 │ 31.53 │ 33.38
0.1 │ 46.85 │ 55.99
─────────────────────────
</tt>

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d0020009n020.pdf 856 KB

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