土壌のカリ固定に関する実験法の検討

Four methods of K-fixation were examined by two kinds of soils as follows :
(1) Drying soils for 12 hours at 100℃.
(2) Drying soils on water bath.
(3) Alternately watting and drying the soils on water bath five times.
(4) Warming the soils for 30 days at 30℃.
The results of this exprriment were as follows :
<tt>
│ Treatment
├───────────────────
Soil │ (1) │ (2) │ (3) │ (4)
─────────────────────────
No. 1 │ 16.5 │ 3.7 │ 7.6 │ 7.1
─────────────────────────
No. 2 │ 21.4 │ 7.3 │ 22.3 │ 12.1
─────────────────────────
</tt>