1. Nitrogen cycling;Johnson;Encyclopedia Agric. Sci.,1994
2. 2 Dickson, R.E. (1989) Carbon and nitrogen allocation in trees In: Forest Tree Physiology, Annales des Sciences Forestière (Dreyer, E., Aussenac, G., Bonnet-Massimbert, M., Dizengremel, P., Favre, J.M., Garrec, J.P., Le Tacon, F. and Martin, F., Eds.), Vol. 46, pp. 631â647. Elsevier, INRA, Paris.
3. 3 Harley, J.L. and Smith, S.E. (1983) Mycorrhizal Symbiosis, 483 pp. Academic Press, London.
4. 4 Smith, S.E. and Read, F.A. (1996) Mycorrhizal Symbiosis, 605 pp. Academic Press, London.
5. Nutrient and water uptake by roots of forest trees;George;Z. Pflanzenernähr. Bodenk.,1996