In order to promote Jatropha curcas as bioenergy without food crops are abandoned, the objective of this study is to evaluate the impact of intercropping J.curcas peanuts and corn on the parameters J.curcas growth and production J.curcas, corn and peanuts according to different types of gauges. A randomized block design was used and the R software was used for analysis of variance between the different tested objects. The association with the J.curcas has a significant effect on the weight of the ears of corn after two years of cultivation. The spacing 3x3 m performance and promotes more 4x2 m promotes vegetative growth. The association with peanut has no significant effect on growth and yield. The effect of the combination on the J.curcas is significant as regards the number of secondary branches, seeds and fruit weight. The interaction between intercropped crops is not detrimental to the J. curcas as speculation grown in association have a short cycle and do not develop a root system and strong shade to the J. curcas as speculation grown in association have a short cycle and do not develop a root system and strong shade to compete J. curcas.

Nauclea diderrichii, is a forest species whose seeds germination is difficult in its biotope. Its overexploitation for its very resistant wood against the attacks leads to its disappearance in Togo. In vitro micropropagation trials were carried out for his faster and massive regeneration. In vitro seedlings apexes had been cultivated on four media (MS, ½ MS, WPM and ½ WPM). The high ionic concentration in macroelements in the culture medium is harmful to N. diderrichii's seedlings development. Complete Woody Plant Medium (WPM) (41,54mM) allowed a better growth of the seedlings during initiation phase. Among both cytokinins (BAP and Kinetin) used, BAP at 2 mg/L, has gave a better multiplication rate (13,65d ± 5.71 nodes/seedling). Among three auxins (IBA, NAA and 2,4-D) used at 0,1mg/L, IBA has gave seedlings with vigorous roots which are better appropriate for weaning, that those obtained with NAA. 2,4-D produced only calluses. The weaning of the seedlings, realized on vermiculite was succeeds at 100%. Thus fast and massive multiplication of N. diderrichii can be done in vitro on WPM added with BAP at 2 mg/L. IBA at 0,1mg/L is the auxin which is better appropriate for improvement of seedlings' rooting.