To deal with the soil fertility decrease, farmers in general and farmers producing vegetables in particular adopt various cropping practices of soils fertility management and conservation. This survey aims at identifying the cropping practices which allow the farmers to carry out the maximum of yield and maximize the return to production factors. To reach this objective, investigations have been led by one hundred and twenty (120) vegetable producers in Malanville. These producers have been carried out at random. The data concerning their socioeconomic characteristics and the cropping practices of soils fertility management and conservation have been collected through an enquiry questionnaire. From the data collected, it comes out that the cropping practices of soils fertility management and conservation permit to increase the crops’ outputs. This contribution to the output improvement varies significantly from a practice to another for tomato and gumbo but stay invariant for onion and pimento. All cropping practices of soils fertility management and conservation are economically and financially profitable. Actually, five (05) factors determine producers’ economic efficiency level. These are about the total land size in use for vegetable production, the grouping adherence, the household size, the number of agricultural workers and the producer's experience in vegetable production.

This paper investigates the determinants of the economic profitability of cashew nuts marketing in North-Eastern Benin. The study was conducted in the municipality of Tchaourou by using survey methods on respondents randomly selected from different categories of actors interacting on the market. Primary data were collected with respect to the marketing year 2013-2014 on up to 160 cashew nut traders such as 91 collectors, 25 retailers, 31 semi-wholesalers and 13 wholesalers. The methodological approach used was based on the paradigm Structure-Conduct-Performance (SCP). As a result, four types of marketing systems of cashew nuts were identified in the municipality of Tchaourou. The analysis of the net margins showed that the cashew nuts marketing in Tchaourou generates average net margins of about 9.08fcfa/Kg for the collectors; 13.12 fcfa/Kg for the retailers, 10.56 fcfa/Kg for the semi-wholesalers and 21.16 fcfa/Kg of cashew nut for the wholesalers.The test of ANOVA highlighted a significant difference between these average values of net margins recorded by the different actors. Moreover the marital status, the experience in marketing, the invested capital in the campaign, the cost of commercial labor and the category of commercial actor determine the level of economic profitability of cashew nuts marketing. As a matter of fact, a particular attention has to be given to these determinants in order to sustain the cashew nuts marketing field in North-Eastern Benin.