• Armstrong, W. (1979). Aeration in higher plants. In: Advances in Botanical Research, vol. 7 (Ed. by H. W.Woolhouse), pp. 225232. Academic Press, London .
  • Armstrong, W. (1982). Waterlogged soils. In: Enviroment and Plant Ecology, 2nd Edn. (Ed. by J. R.Etherington), pp 290330. Wiley, Chtchester .
  • Armstrong, W. & Healy, M T. (1984). Oxygen diffusion in pea. III. Changes in oxygen status of the primary root relative to seedling age. The New Phytologist, 96, 179185.
  • Ashenden, T. W., Stewart, W. S. & Williams, W. (1975). Growth responses of sand dune populations of Dactylis glomerata L. to different levels of water stress. Journal of Ecology, 63, 97107.
  • Charles, A. H. (1961). Differential survival of cultivars of Lolium, Dactylis and Phleum, Journal of the British Grassland Society, 16, 6975.
  • Clapham, A. R., Tutin, T. G. & Warburg, E. F. (1981) Excursion Flora of the British Isles, 3rd Edn. Cambridge University Press, Cambridge .
  • Crossley, G. K. & Brahshaw, A. D. (1968). Differences in response to mineral nutrients of populations of Rygrass (Lolium perenne L.) and Orchardgrass (Dactylis giomerata L.) Crop Science, 8, 383387.
  • Davidson, R. L. (1976). Root systems – the forgotten component of pastures. In: Plant Relations in Pastures (Ed. by J. R.Wilson), pp. 8694. CSIRO, Melbourne .
  • Davies, M. S. & Snaydon, R. W. (1973). Physiological differences among populations of Anthoxanthum adoration L. collected from the Park Grass Experiment, Rothamsted. I, Response to calcium. Journal of Applied Ecology, 10, 3345.
  • Eagles, C F. & Williams, D. H. (1971). Competition between natural populations of Dactylis Glomerata. 77, 18793.
  • Etherington, J. R. (1967). Measurement of photosynthesis and transpiration in controlled environments with particular reference to microclimate control in leaf cuvettes. Annals of Botany, 31, 653660.
  • Etherington, J. R. (1984). Comparative studies of plant growth and distribution in relation to waterlogging. X. Differential formation of adventitious roots and their experimental excision in Epilobium hirsutum and Chamerion angustifolium. Journal of Ecology, 72, 389404.
  • Evans, G., Ellis-Davies, W. & Charles, A. H. (1960). Shift and the production of authenticated seed of herbage cultivars. Report of the Welsh Plant Breeding Station 1960, pp. 99106, Aberystwyth.
  • Harris, W. (1976). Defoliation as a determinant of the growth, persistence and composition of pasture. In: Plant Relations in Pastures (Ed by J. R.Wilson), pp. 6785. CSIRO, Melbourne .
  • Healy, M. T. & Armstrong, W. (1972) The effectiveness of internal oxygen transport in a mesophyte (Pisum sativum L.). Planta, 103, 302309.
  • Humphries, M. O. (1980). Grass breeding: objectives, principles and potentials. In: Amenity Grassland: An Ecological Perspective (Ed. by I. H.Rorison & R.Hunt), pp. 5767. Wiley, Chichester .
  • Jones, H E. & Etherington, J. R. (1970). Comparative studies of plant growth and distribution in relation to waterlogging. I. The survival of Erica anerea L. and E. tetralix L. Journal of Ecology, 59, 167178.
  • Jones, R. (1972). Comparative studies of plant growth and distribution in relation to waterlogging. Y. The uptake of iron and manganese by dune and slack plants. Journal of Ecology, 60, 131140.
  • Jones, R. & Ethehington, J. R. (1971). Comparative studies of plant growth and distribution in relation to waterlogging IV. The growth of dune and slack plants. Journal of Ecology, 59, 793801.
  • Mahmoud, A., Grime, J. P. & Furness, S. B. (1975). Polymorphism in Arrhenatherum elatius Beauv. ex j. & C- Presl. The New Phytologist, 75, 769776.
  • McNaighton, S. J. (1983). Physiological and Ecological Implications of Herbivory. In: Encyclopedia of Plant Physiology, New Series, vol. 12C (Eds O. L.Lange, P. S.Nobel, C. B.Osmond & H.Zeigler), pp. 657677. Springer, Berlin .
  • Passopira, J. B. (1972). Effect of root geometry on the yield of wheat growing on stored water. Australian Journal of Agricultural Research, 23, 745752.
  • Rahman, M. S. & Rutter, A. J. (1980). A comparison of the ecology of Deschampsia cespitosa and Dactylis glomerata in relation to the water factor. II. Controlled experiments in glasshouse conditions. Journal of Ecology, 68, 479491.
  • Sestak, Z., Catsky, J. & Jarvis, P. G. (1971). Plant Photosynthetic Production: Manual of Methods, Junk. The Hague .
  • Stapledon, R. G. (3928). Cock's-foot grass (Dactylis glomerata I.: ecotypes in relation to the biotic factor. Journal of Ecology, 16, 71104.
  • Talbot, R. J. (1983). Biochemical, physiological and ecological studies of waterlogging tolerance in Salix species. Unpublished Ph.D. thesis. University of Wales.
  • Williams, W. T. & Barber, D. A. (1961) The functional significance of aerenchyma in plants. In: Mechanisms in Biological Competition (Ed. by F. L.Milthorpe), pp. 132144. Cambridge University Press, Cambridge .