1. Adjahossou F, Vierra Da Silva J (1978) Teneur en glucides solubles et en amidon et résistance à la sécheresse chez le palmier à huile. Oléagineux 33(12):559–604
2. Annerose D, Cornaire B (1994) Approche physiologique de l’adaptation à la sécheresse des espèces cultivées pour l'amélioration de la production en zones sèches. In: Reyniers F-N, Netoyo L (eds) Bilan hydrique agricole et sécheresse en Afrique tropicale. John Libbey Eurotext, Paris, pp 137–150
3. Atkinson D (1986) The nutrient requirement of fruit trees: some current considerations. Adv in Plant Nutr 2:93–128
4. Cao KF (2000) Water relations and gas exchange of tropical saplings during a prolonged drought in a Bornean heath forest, with reference to root architecture. J Trop Ecol 16:101–116
5. Chopart JL (1996) Comparison of several methods of studying the maize deep root system under field conditions. In: Int. Soc. of Root Res. (Ed) 5th Symposium, Clemson University, South Carolina (USA), p 138