1. Austin, R. B., Yield of onions from seed as affected by place and method of seed production. J. Hort. Sci.38, 277?285 (1963).
2. Austin, R. B., The growth of watercress (Rorippa nasturtium-aquaticum (L) Hayek) from seed as affected by the phosphorus nutrition of the parent plant. Plant and Soil24, 000?000 (1966).
3. Black, J. N., Seed size in herbage legumes. Herb. Abstr.29, 235?241 (1959).
4. Crean, D. E. C. and Haisman, D. R., A note on the slow rehydration of some dried peas. Hort. Research2, 121?125 (1963).
5. Haworth, F. and Cleaver, T. J., The effects of the uptake of different amounts of potassium on the rate of growth of carrot seedlings. J. Hort. Sci.38, 40?45 (1963).