The Effects of Day Length and Light Intensity on Tile Growth of Barley

Abstract

The acceleration of flowering in barley due to the inclusion of incandescent illumination in the light source has been shown to be due to the far·red content of the light. A linear relationship between floral development and intensity of far·red light in a 16·hr photoperiod has been established with the cultivar CI5611. Barley appears to be relatively unresponsive to blue light, however.