Abstract
To a highly acidic mineral soil of diluvial series added slaked lime so that 25,50,75,100,125 and 150% of the exchangeable hydrogen was neutralized, and cultivated Mulberry tree. The following results are obtained. (1) The growth and yield of Mulberry tree are best on the soil which 50% of the exchangeable hydrogen was neutralized. (2) The percentage of nitrogen, lime and crude ash in mulberry leaves increase with increasing additions of slaked lime, but the total carbohydrate and crude fibre are the reverse. The protein content, water soluble carbohydrate, ether soluble substances, phosphorus and potash in leaves are maximum on the 50% neutralized soil. (3) The reaction and exchangeable lime content of each plot are showed in a following table.[table]From the above results it appears to be that the optimum degree of neutralization of soil on mulberry cultivation is about 60% of exchangeable hydrogen.
