The market gardening sector is a sector of activity admired by women and men. With a view to improving market gardening production, an experiment was carried out at the Superior Normal School of Bongor (ENS/B) the main objective of this work is to evaluate the effects of pigeon droppings and cow dung on the development parameters of sesame in order to determine the optimal dose of organic fertilizer provided to the plants for a better yield. For this to do so, the agro-phenological parameters were observed, noted and measured. From the result, it appears that the number of flowers and capsules per plant, the number of seeds per capsule, the weight of seeds per capsule, the yields in grams per plant and ton per hectare were obtained in the plants having received the combination 20 g of cow dung and 20 g of pigeon droppings.

Inadequate use of mineral fertilizers causes leaching and impoverishment of soil which results in a considerable drop in yield. The use of organic fertilizers seems to be a reliable alternative to improve yield. The objective of the work is to evaluate the effect of goat waste at different levels in order to determine the optimal dose for better rice production. It also aims to verify the idea that mineral fertilizer modifies the organoleptic quality of food. For this the length of the plants was measured and the associated maximum growth speed was determined. The number of tillers per plot, the number of panicles per plot, the number of grains per tiller, the weight of grains per tiller were recorded and the yield was estimated. The results showed that the parameters studied were significantly influenced by the fertilizer inputs. Thus the highest height (77.33 cm) was observed in the plants having received the dose of 2.5 kg/m2 of goat waste with the maximum growth speed of 5.11 cm per day reached on the 85th day after sowing. The same goes for the number of tillers per plot (336) and the number of panicles per plot (329.33). While the highest number of grains per tiller (1253), weight of grains per tiller (26.42) and yield were noted in plants treated with 10 g NPK and 5g Urea. In addition, the rice having been treated with goat waste is sweet (60 %) and presents a good floury appearance (86.67 %). The dose of 2 kg/m2 of goat waste seem to be optimal for the cultivation of rain fed rice. Thus goat waste could validly replace mineral fertilizer in soil fertilization.

This study was conducted to evaluate the morphological and agronomic performance of ten varieties of sweet potato grown in Bongor in Chad during the dry season. The average length of internodes of the main stem and means the collar diameters were measured and maximum growth rates associates were determined, the length and diameter of tuber were measured, the number of tuber per plant were recorded tuber yield, the diameter/length ratio of the tuber, the average weight of tuber and dry matter aboveground biomass were determined. The results, it appears that varieties BF 59 and BF 40 have the longest and varieties BF 108 and TIB have diameters in the larger collar internodes. The highest growth rates were noted between the 37th and 51st JAP and between the 23rd and 72nd JAP respectively for the length of internodes and the collar diameter. For agronomic parameters, variety BF 108 was more effective for most of the studied parameters. This variety seems interesting for the selection of work.

The objective of this study was to highlight the physiological, morphological and agronomic performance of varieties and descendants of sesame (Sesamum indicum) grown in Burkina Faso. Experimentation was conducted at the Gampela educational agro station located at 12