1. Allsopp, A., The significance for development of water supply, osmotic relations and nutrition. Handbuch der Pflanzenphysiologie15 (Part 1), 504–522 (1965).
2. Brouwer, R., The influence of temperature on the growth and development of peas. Jaarb. Inst. Biol. Scheik. Wageningen1959, 17–37 (1959).
3. Brown, R. and Sutcliffe, F. J., The effects of sugar and potassium on extension growth in the root. J. Exp. Botany1, 88–113 (1950).
4. Campbell, J. C., The influence of low root zone temperature on the growth and chemical composition of corn. Ph.D. Thesis, Cornell University, Ithaca (1965).
5. Friend, D. J. C., Helson, V. A., and Fisher, J. E., The rate of dry weight accumulation in Marquis wheat as affected by temperature and light intensity. Canad. J. Botany40, 939–958 (1962).