抄録
1. This experiment has been made to find out the main factors which induce the abnormal tuberization on potato tuber. 2. In 1st. experiment, the abnormal tuberization were obtained under the condition of darkness, ordinary temperature, dryness in soil, and darkness, ordinary temperature, moist air. 3. In 2nd. experiment, in which the sand contained 60, 10 and 5% of saturate moisture were used, only the short small buds were sprouted in the 5% moisture of sand, but abnormal tuberizetion were occured at the 10, 60% of moisture. 4. Under the condition of 10% saturate moisture, the new potato grew directry on the old pieces or on the stem just like rhizome. In the case of 60% saturate moisture, on the contrary it may be considered, as the top of buds were corrupted and could not grow further, then the new potato were formed at the axil. 5. From the results of this experiments, it could be suggested that (1) the condition of 60-10% moisture may be the causes of the abnormal tuberization of potato which showed at the end of storage and (2) the dryness of soil, about 10% of moisture may be the cause of the sprout tuber which showed at the field.
