Analysis of peasant practices for the sustainable soy production has been achieved in the district of Kalalé. The objective of this research is to make the census of the different peasant practices which characterize that production, in order to have a compared analysis with the sustainable soy production methods recommended in Benin. The methodological approach use dis based on the structured interview for the farmers and the semi-structured interview for the farmers’ technical coaching agents of Kalalé. The sampling has taken into account 88 soy producers and 09 farmers’ technical coaching agents (TS and ACIPV) from the Kalalé agricultural area. The obtained results indicate that extensive production practices based on rampant increase of farming lands for better yield, has remained low. The Jupiter variety is dominantly farmed (79.54%) followed with the TGX (20.45%). The majority of the farmers (82.95%) take away their seeds from their former stocks, instead of referring to certified seeds. The seeds then are submitted to no prior treatment, nor any inoculation before being sown. Moreover, crops rotation is a common practice in the study area (62.79 %) and the mostly practiced farming system is soy in pure (79.55 %). For the land plowing, most soy farmers (64.77 %) do direct hillocking with bullfinch plought against 3.40 % of farmers who practice the recommended flat plowing, followed with 31.83 % farmer who used big hoes with their hands. All the inquired farmers have densities inferior to the recommended ones (10 cm x 50 cm). Despite the high poverty of soils, the use of organic fertilizers has been observed with none the inquired farmers. The mineral fertilizing is used by very few farmers (04.55 %). Also, dates, periods and doses for handling the fertilizers are not usually respected by those farmers who use them. The phytosanitary protection is totally absent from the study area.

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.