Abstract
Abstract Chemical changes ordinarily occuring in flooded paddy soils in Japan had been investigated in detail by Dr. SHIOIRI and his coworkers (1). The problem of degraded paddy soils had also been discussed by them on the basis of the experimental results on the deficiency of free iron oxides which affect the root of rice plant. As described in the previous report (2), causes for low rice production in the peaty Paddy fields seemed to be different from those in the degraded paddy ones. Thereupon, for a comprehensive understanding of the properties of peaty paddy soils, many important aspects such as the nature and role of each soil layer, and the behaviour of iron and nitrogen in soil Will have to be studied.
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