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References

  • Pate, J. S. (1961). Perennial nodules on native legumes in Britain. Nature, London, 192, 376.
  • Sprent, J. I. & Bradford, A. M. (1977). Nitrogen fixation in field beans (Vicia faba) as affected by population density, shading and its relationship with soil moisture. Journal of Agricultural Science, Cambridge, 88, 303.
  • Waughman, G. J. (1977). The effect of temperature on nitrogenase activity. Journal of Experimental Botany, 28, 949.