The agrarian zone of Thangone is located 30 kilometres North far from Vientiane, capital of the Lao P.D.R., near the Nam Ngum valley. The farmers of this area have in common the flooded and irrigated culture of rice crops. However, for a disparity of access to the land and irrigation, the rice yields are quite various. This is the cause for the apparition of different levels of cumulation. In this way, we can find farmers practising an intensive breeding of poultry, farmers practising an associated porcine and fish breeding, and finally fanners practising crops allowing a big income (corn, sugar cane, vegetables, fruit trees). On the contrary, there are farmers who need to have another job in order to improve their weak income, due to bad rice yields. For this class of fanners, we should encourage and facilitate the access to pork and poultry breeding, and to fertilisers. This could be done by means of developing subsidised prices or micro-credit bank. (Résumé d'auteur