Abstract
In order to obtain some fundamental information for potato cultivation, this experiment was performed to study responses of the plant to temperature during its growing season. Judging from the mode of the top growth in earlier and later stages each, divided at the flowering time of the 1st cluster, the development of which closely relates to the tuber yield, we distinguished 4 types, namely, A) normal-normal, B) normal-abnormal, C) abnormal-normal, and D) abnormal-abnormal. The types A, B and C are all common in Japan, and main factors deciding the type are the localitiy and the growing season, which are closely related with air temperature.
