EN
Professional knowledge management becomes nowadays a key factor of successful running a farm business. The following article focuses on ways of gathering professional knowledge by modern farmers and its sources as well as on the ways of this knowledge functioning in agriculture. The author concentrates on the ineffectiveness of farmer trainings, collective and local character of agricultural knowledge as well as discusses farmers' traditionalism in their certain activities. The paper is based on the material gathered by the author during her long-lasting ethnographic research conducted from 2004 to 2007 in villages of Zambrów county.