Abstract
The effect of soil treatments on growth of tea plant, yield of tea leaves, tea qualities and physical and chemical properties of soil in tea field was investigated from 1960 to 1968. To improve soil condition following three treatments were carried out, plowing deeply several fagots and pieces of stone into the ground and inverting subsoil about one meter depth. The result obtained was as follows:1. The growth of young tea plant did not differ with the soil treatments.2. The yield of tea leaves was increased by the soil treatments, especially being increased year by year owing to plowing fagots into the ground. Tea quality was scarcely influenced by these treatments.3. Soil being treated, many fine roots were seen in the land between rows and extended deeply into the ground. The amount of roots was increased by these treatments, too.4. The physical and chemical properties of soil improved by these treatments, especially plowing several pieces of stone into the ground, was superior to those of non-plowing.
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