The industrialization of the agricultural sector has resolved, at least in Europe and in the United States, the thousand year-old problem of the lack of food. Unfortunately, during the last years the limits of such an agriculture clearly exploded. The modernized agriculture, in fact, produces...

Rural areas in Europe are characterized by several agricultural models and paths. We can schematically divide them in two typologies of agriculture: the modernized and the traditional agriculture. The first typology is characterized by agricultural techniques of production pervaded by industrial...

In the first section we recall Bak Sneppen model and its evolutions. In this paper we wish to present some simplified cases in which explicit computations via Markov chains are possible, hence reaching a better understanding of some rather hidden phenomena of the general case: in particular...