In this study the relationships between the agricultural communities of « Les terres noires (black soils) of Napierville-Châteauguay » and the city of Montréal are examined. The urbanization of the countryside produces modifications of the social and production structures ; these structure are tightly related and constitute the fundamental and practical structures of society. The setting of this rural area was the result of a voluntary action, an act of colonization which, beginning in 1945, regrouped various demographic elements of diverse geographic and ethnic origins. This rural entity of recent formation was designated to experience the dynamic processus of integration into an urban society. The processus can be identified as socialization within the group and acculturation without. This socio-cultural evolution cannot be disassociated from the participation of producers in industrialised agriculture. Their agricultural activity is based above all upon a very high agro-pedological potential, which, when brought under cultivation, yields high value specialized vegetable production. One after the other the following analyses are made : the relationship of black soil to brown soil, the importance of functional buildings, variation of the relationship between man and machine, the relative importance of child labour, all important characteristics of « city surrounding » agriculture. This lowlands community functions autonomously, based on an original activity of production and family labour. No real forms of urbanization are presently observable, but urban influence is subtly making its presence felt.