The Effect of a Controlled Nitrogen Supply with Different Temperatures and Photoperiods upon the Development of the Potato Plant

Abstract

The potato (Solanum tuberosum Linn.) is grown under a great variety of conditions with regard to temperature, length of day, intensity and character of light, texture, fertility, and moisture of soil, and atmospheric humidity. There is need for a better understanding concerning the internal response of the potato plant to these external conditions when they are applied, either singly or in combination with each other, and the resulting morphological response, especially with regard to the tuberization process. It has been the object of this investigation to determine the relation of the nitrogen supply to the processes of stolon and tuber formation with different temperatures and with photoperiods of different lengths, and at the same time to determine some of the internal physiological responses accompanying these morphological responses.