The study on the effect of the organic fertilizers on the productivity of the two tomato varieties has been achieved in the municipality of Parakou in the northern Benin. The objective of this study is to evaluate the effect of the cow, chicken and goat dungs on the growth and fruit yield of two varieties of tomato (F1 Mongal and F1 jaguar). Treatments consisted of three organic fertilizer types (cow, chicken and goat dung) with a control without fertilizer. The dose of applied organic manure is 40t/ha (15kg/ridge). The treatments were randomly distributed into a complete randomized block design and replicated four times. The organic manure was dried and applied three week before transplanting. The results showed that the variety F1 Mongal is significantly (P <0.05) more productive (103kg/are ± 14.65kg/are) than the variety F1 jaguar (49kg/are ±13.22 kg/are). The study revealed that the droppings of chicken increased the forwardness of apparition of the floral buttons and the flowers of two (02) days compared to the witness. With regard to the height and the number of twining stems, they are significantly (P <0.05) increased with the application of chicken droppings (81,5cm ± 7.15cm and 85.5 ± 9.88cm) whereas the circumference to the collar of the tomato plants was significantly (p <0, 05) increased with the application of cow dungs (5.72cm ± 0.05cm). The best outputs (286.4kg/Are ±17.53kg/are) have been obtained with the chicken droppings. It is evident from this study that the combination of chicken droppings with the variety F1 Mongal is more productive than the variety F1 Jaguar with the same organic fertilizer in the municipality of Parakou.

From the market gardening activities that they carry out the urban farmers play an important economic role in contributing in a significant way, to the revenue of their households. The aim of the present article is to characterize the urban market gardening and to analyze its economic profitability in Parakou (north Benin) on the basis of the net margin of production. In that respect, some data have been collected from 125 producers and resource persons selected in a rational way in the city of Parakou. The analysis of the data collected on the basis of a questionnaire has been made with the help of descriptive statistics and tests of Khi-deux (χ2) of Pearson. The results have shown that the market gardening activity is exercised by men (84.67 %) and women (15.33 %) of 19 to 70 years old with 1 to 50 years experience. The tools used are still rudimentary and archaic. The application of fertilizer (organic and mineral) has brought out a cost which is up to 53.71 % of the expenses. The gross revenue of such exploitation is up to 11 150 F CFA with a gross margin of 6775 F CFA. The net monthly salary of the producers is on average up to 172 621 F CFA corresponding to a monthly salary of a senior staff in the Beninese public administration which is four times the GDMS (Guaranteed Decent Minimum Salary). This is to say that market gardening in Parakou is economically profitable in terms of net margin of production. It is then useful for the actors to work in synergy in view of a sustainable development of that activity through the improvement of agricultural practices, land securing and the access of the producers to adapted credits.