The paper presents the size and structure of raw materials and commodities flow in agricultural farms from the aspect of production simplification. The assumed aim was carried out based on the research conducted in 80 farms of Southern Poland. Facilities for research were divided according to a simplification degree. The highest I°degree of simplification includes only one group of plants. Subsequent degrees of simplification respond to an increasing number of plants, since the number of cultivated groups of technological plants decides on the simplification degree. As a result of the research which was carried out, the size and structure of raw materials and goods flows was assessed within 3 main areas of logistics - supply, production and distribution. The final effect of the research was development of raw materials and commodities flow in the researched groups of farms.