International audienceThe northern Sierra Leone is an economically marginalized region. Production systems are not differentiated either in term of capital accumulation or specialization. In the studied region, the commodification of the labour force is explained both by production units split and monetization of the peasant income. Exchanges of labour force among the village account for the high level of agricultural income disparity, especially in a manual agriculture. But these disparities do not result into an enduring differentiation among the peasantry because of consumer/producer ratio heterogeneity, linked it self of the persistence of the children fosterage nowadays.Dans le nord de la Sierra Leone, région marginalisée sur le plan é...