An Example of the Aegd Paddy Soil : Investigation on the Soils, once Used as the Bed for Young Plants, of Cryptomeria-Japonica and Chamaecyparis-Obtusa.

Abstract

Investigation was made on the soils from Iwane, Koga-gun, Shiga Pref. The soils were used as the bed for young plants Cryptomeria-Japonica and Chamaecyparis-Obtusa, since 1892,and have aged, pecentry for rice plant cultivation. The results were as follows : - 1) The soils were strongly acidic. 2) Owings to the reaction 1), the hydrolysis of soil minerals seemed to easily occur and to cause the soils to age.