• Anderson, W. P., Aikman, D. P. & Meiri, A. (1970). Excised root exudation–a standing-gradient osmotic flow. Proc. R. Soc, B, 174, 445.
  • Anderson, W. P. & Collins, J. C. (1969). The exudation from excised maize roots bathed in sulphate media. J. exp. Hot., 20, 72.
  • Anderson, W. P. & House, C. R. (1967). A correlation between structure and function in the root of Zea mays. J. exp. Bot., 18, 544.
  • Arisz, W. H., Helder, R. J. & Nie, R. Van (1951). Analysis of the exudation process in tomato plants. J. exp. Bol., 2, 257.
  • Boyer, J. S. (1971). Resistances to water transport in soybean, bean and sunflower. Crop Sci., 11, 403.
  • Brouwer, R. (1953a). Water absorption by the roots of Vicia faba at various transpiration strengths. I. Analysis of the uptake and the factors determining it. Proc. K. ned. Akad. Wet., c, 56, 106.
  • Bhouweer, R. (1953b). Water absorption by the roots of Vicia faba at various transpiration strengths. II. Causal relation between suction tension, resistance and uptake. Proc. K. ned. Akad. Wet., c, 56, 129.
  • Bkouwer, R. (1954). The regulating influence of transpiration and suction tension on the water and salt uptake by the roots of intact Vicia faba plants. Acta bot. neerl., 3, 264.
  • Gardner, W. R. (1960). Dynamic aspects of water availability to plants. Soil Sci., 89, 63.
  • Hay, R. K. M. & Anderson, W. P. (1972). Characterization of exudation from excised roots of onion, Allium cepa. J. exp. Hot., 23, 577.
  • House, C. R. & Findlay, N. (1966a). Mechanism of fluid exudation from isolated maize roots. Nature, Lond., 211, 649.
  • House, C. R. & Findlay, N. (1966b). Water transport in isolated maize roots. J. exp. Bot., 17, 344.
  • House, C. R. & Findlay, N. (1966c). Analysis of transient changes in fluid exudation from isolated maize roots. J. exp. Bol., 17, 627.
  • Kramer, P. J. (1969). Plant and Soil Water Relationships: a Modern Synthesis. McGraw-Hill, New York .
  • Kuiper, P. J. C. (1963). Some considerations on water transport across living cell membranes. Bull. Connecticut agric. Exp. Stn., 664, 59.
  • Lawlor, D. W. (1970). Absorption of polyethylene glycols by plants and their effects on plant growth. New Phytol., 69, 501.
  • Lawlor, D. W. (1972). Growth and water use of Lolium perenne. I. Water transport. J. appl. Ecol., 9, 79.
  • Mees, G. C. & Wkatherley, P. E. (1957). The mechanism of water absorption by roots. I. Preliminary studies on the effects of hydrostatic pressure gradients. Proc. R. Soc, B, 147, 367.
  • Newman, E. I. (1060). Resistance to water flow in soil and plant. I. Soil resistance in relation to amounts of root: theoretical estimates. J. appl. Ecol., 6, 1.
  • Newman, E. I. (1973). Root and soil water relations. In: The Plant Root and Its Environment (Ed. by E. W.Carson). University of Virginia Press, Blacksburg , Virginia . (In press.).
  • Slatyer, R. O. (1967). Plant-water Relationships. Academic Press, New York .
  • Stoker, R. & Weatherley, P. E. (1971). The influence of the root system on the relationship between the rate of transpiration and depression of the leaf water potential. New Phytol, 70, 547.