The objective of this study was to determine the influence of branch type on the cutting ability of eight kola clones (Cola nitida). To this end, the clones were tested in a split-plot experimental design with the factors studied being the clone and the nature of the branch. After seven weeks of experimentation, survival rates were evaluated for each clone and for each type of cutting. The results showed that the clones were significantly different for the survival rates obtained (p = 0.00). The terminal branches were more suitable for cutting (70.62% survival) than the sub-terminal branches (33.95%). The age of cutting therefore influenced the success of cutting in the clones studied. At the end this work, we note that clones 305, 323, 330, 903A3 and 911A2 are promising for kola tree cutting from terminal branch and that clone 910A1 cut easily with both terminal and sub-terminal branch.

The clone PB 235 of Hevea brasiliensis is characterized by a rapid growth, homogeneity, and a virgin bark which is suitable for tapping. However, it is sensitive to the very intense latex systems harvesting technologies. This paper focuses on determining the incidence of strong frequencies of stimulation on two downward tapping systems of clone PB 215: low (d6) or moderate (d4). Rubber trees were planted with the density of 510 trees/ha (7 m x 2.8 m) in accordance with a randomized complete block design. Tapping at d6 frequency with 8 and 12 hormonal stimulations and the d4 stimulated 0 and 8 times per year were evaluated. The intensification of hormonal stimulation with the d6 did not have any worthy beneficial effect on the dry rubber yield of the rubber trees. In d4, the stimulation involved a reduction in the sucrose content which led to a significant increase of the dry rubber yield. However, it contributed to an increase in the tapping panel dryness. At moderate tapping, the application of hormonalstimulation allowed us to distinguish between the two latex harvesting technologies. At d6, the two treatments were similar regardless of the stimulation level. Tapping at d6 supports a reduction of tapping workforce and a longer economical durability of the trees, compared to tapping at d4. The intensification of hormonal stimulation applied to lower tapping frequencies (d6) did not have any negative incidence on the clone PB 235. However, it has promoted tapping panel dryness in tapping at d4 frequency.

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Notre etude realisee sur le mil (Pennisetumglaucum(L.) R. Br.), au Centre-Nord de la Cote dIvoire, avait pour objectif de determinerles effets de la date de semis et de la fertilisation sur la phenologie et les parametres de croissance dune variete precoce de mil. Deuxessaisontete mis en place selonundispositifexperimentalconstitue de blocs completsrandomises, a trois repetitions. Le facteur principal, la fertilisation a cinq niveaux (NPK [15-15-15 + 6S + 1B]) :fiente de poulet, dejections de lapin et de bœuf, temoin {Sans apport dengrais}). Les observations ontporte, essentiellement, sur la phenologie et les parametres de croissance. Par ailleurs les quantites de pluiestombees au cours de lexperimentationonteteenregistrees. Nos resultatsontmontre que la phenologie a eteinfluencee par les differentes dates de semis combinees a lutilisation des fumures. La fiente de poulet par rapport au temoin, a favoriseunereduction des delais de floraison et de durees de cycle au premier semis. Au second semis, la duree de cesdifferentsstades, a etereduitepar la dejection de lapin. Il ressort un raccourcissement de cesdelais au semis 1 comparativement a la date de semis 2. Ence qui concerne les parametres de croissance, la fumuremineralesestrevelee plus efficace. De plus, la croissance a etemeilleure a la premiere date de semis qua la seconde date.