• Clarkson, D. (1974). Ion Transport and Cell Structure in Plants. 350 pp. John Wiley, New York .
  • Cooper, A. J. (1973). Root Temperature and Plant Growth: A Review. Res. Rev. 4, Commonwealth Bur. Hort. and Plantation Crops, Commonwealth Agr. Bur., East Mailing, Maidstone, Kent. 73 pp.
  • Ehlig, C. F. (1961). Measurement of the energy status of water in plants with a thermocouple psychrometer. Plant Physiology, 37, 288.
  • Gardner, W. R. (1973). Internal water status and plant response in relation to the external water regime. In: Plant Response to Climatic Factors (Ed. by R. O.Slatyer), pp. 221225. Unesco, Paris .
  • Giese, A. C. (1962). Cell Physiology. 592 pp. W. B. Saunders Co., Philadelphia .
  • Kanemasu, E. T., Thurtell, G. W. & Tanner, C. B. (1969). Design, calibration and field use of a stomatal diffusion porometer. Plant Physiology, 44, 881.
  • Kirkham, M. B. & Ahring, R. M. (1978). Leaf temperature and internal water status of wheat grown at different root temperatures. Agronomy Journal, 70, 657.
  • Kirkham, M. B., Gardner, W. R. & GERLOFF, G. C. (1969). Leaf water potential of differentially salinized plants. Plant Physiology, 44, 1378.
  • Nielsen, K. F. (1974). Roots and root temperatures. In: The Plant Root and Its Environment (Ed. by E. W.Carson), pp. 293333. University Press of Virginia. Charlottesville .
  • Perrier, A. (1971). Leaf temperature measurement. In: Plant Photosynthetic Production. Manual of Methods (Ed. by Šesták, J.Čatsk$yA and P. G.Jarvis), pp. 632671 Dr W. Junk N.V. Publishers, The Hague .
  • Rawson, H. M., Gifford, R. M. & Bremner, P. M. (1976). Carbon dioxide exchange in relation to sink demand in wheat. Planta, 132, 19.
  • Steel, R. G. D. & Torrie, J. H. (1960). Principles and Procedures of Statistics. 481 pp. McGraw-Hill, New York .
  • Todd, G. W. & Webster, D. L. (1965). Effects of repeated drought periods on photosynthesis and survival of cereal seedlings. Agronomy Journal, 57, 399.
  • Torrey, J. G. (1976). Root hormones and plant growth. Annual Review of Plant Physiology, 27, 435.
  • Walker, J. M. (1970). Effects of alternating versus constant soil temperatures on maize seedling growth. Soil Science Society of American Proceedings, 34, 889.
  • Willis, W. O., Larson, W. E. & Kirkham, D. (1957). Corn growth as affected by soil temperature and mulch. Agronomy Journal, 49, 323.