In this paper we seek to make a reconstruction of the institutional trajectory of the Granja-Escuela department of San Rafael (Mendoza), a project of the provincial government to generate and disseminate knowledge among farmers who had no access to the Escuela Nacional de Vitivinicultura, the latter located in the city of Mendoza. The initiative went through various difficulties in meeting its objective foundation, so it is interesting to analyze also the performance of the regional agronomist, a figure created by the Agriculture Ministry's Office for training on agricultural techniques to farmers who had no access to formal education systems. Searching, thus establishing a relationship between the teaching of guidance technical-productive and agro-economy in a period of modernization.