1. Allison, J. C. S. and Watson, D. J., The production and distribution of dry matter in maize after flowering. Ann. Bot.30, 365–381 (1966).
2. Ambler, J. E. and Brown, J. C., Causes of differential susceptibility to zinc deficiency in two varieties of navy beans (Phaseolus vulgaris L.). Argon J.61, 41–43 (1969).
3. Asana, R. D., In quest of yield. Indian J. Plant Physiol.11, 1–10 (1968).
4. Chandler, R. F., Plant morphology and stand geometry in relation to nitrogen.In Physiological aspects of crop yield eds. J. D. Eastin, F. A. Haskins, C. Y. Sullivan and C. H. M. Van Bavel, American Society of Agronomy, Madison, Wisconsin, USA, 265–285 (1969).
5. Fischer, R. A., Yield potential in a dwarf spring wheat and the effect of shading. Crop Sci.15, 607–613 (1975).