1. The highly acid mineral soil originated from tertiary strata was used for this experiment. The soil was divided into 8 parts, and each of them was mixed with various amount of CaCo_3 ranging from 0% to 2.5 % of the soil, so as they indicate respectively various pH values at the range of about 4.5-8.0; after that the definite amount of the manure was added to each part. The soil thus prepared was put in a Wagner pot or a glazed pot and was employed for cultivation of the plant. 2. Plants can grow well over a wide range of soil acidity from acid soil to alkaline one. It can be said, therefore, that the plant is not so sensitive to the soil acidity and the lime content of the soil; yet it is also acceptable from the experiment that the plants rather prefer to grow on the acid soil with a little lime (pH 4.5-6.7; CaCo_3 0-0.8%) than the calcareous alkaline soil (pH 7-8; CaCo_3 content of 0.6-0.8%. 3. It was observed that the plants grown on the acid soil with a little lime possessed a physiognomy different drom that on the calcareous alkaline soils.
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