In Senegal since the 2000s, different agricultural policies and public programs have been enacted by the regimes of Abdoulaye Wade (2000-2012) and Macky Sall (2010 to the present) with the goal of, among others, opening up the sector to more liberal policies that they have supported. This desire to liberalize comes during a national context characterized by reforms enacted in 1996 giving an increased autonomy to the local collectivities in their management of land resources. The international context was similarly marked by the international financial institutions, notably the World Bank, advocating similar liberal policies, pushing for the modernization of the sector and an increase in productivity. By examining the installation of two agro-industrial companies (Senhuile and West Africa Farms) in the commune of Ngnith in the Saint Louis region, this study attempts to reveal to what degree this commune exercises its decentralized land management responsibilities in this new context of liberalization. The case studies retrace the different steps in the acquisition of land by these companies and the roles of the different actors involved in this process (the State, agro-industrial companies, rural communities, the commune of Ngnith, local populations, etc.). The study also analyses the different modes of production of these companies as well as the impacts and multiple risks resulting from their establishment. The results obtained, principally through interviews and semi-structured surveys conducted near the different locations of these companies, have generally shown that the current practice of decentralization in this commune cannot alone explain the establishment of these companies. Rather, the analysis reveals a three-fold process: the strong involvement of the State despite transferring the authority to the commune, the decisive role of a part of the local population, and the complexity of land acquisition strategies used by the companies.