老朽化水田土壌に関する研究(第2報) : "あらし"(田畑輪換)が黒ボク系老朽化水田土壌に及ぼす影響について

概要

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In reference to the previous report, in this paper, we investigated the effet of "Arashi" to the chemical and physical properties of paddy field soil in Ando soil area of low yield. The results obtained were as follows : (1) "Arashi" seemed to change chemical and physical properties of the paddy soil in accordance with the kind of geological formation. (2) With the above treatment (Arashi), a large amount of humus in the Ando soil was changed into the rotted product, and true humic acid was decreased. This product seemed to raise the productive power of the field. (3) On the other hand, free iron oxide relatively decreased, the rotted product was decomposed, and hydrogen sulfide was developed; consequently an increase of rice-yield in this Ando soil was not necessarily expected.
社団法人日本土壌肥料学会の論文
1956-03-05