Abstract
The great proportion of the surface with agricultural vocation dedicated to a precarious extensive ranching has explained the low agricultural productivity in Colombia, with very serious consequences for the human and sustainable development. The extensive ranching produces very little employment and economic value in comparison with the agriculture and generates a negative impact on the environment. The poverty, the social exclusion and the violence that faces the country are the expressions of a problem that arose from an agrarian anachronistic structure, and that has deep roots in the excessive concentration of the land. This article provides an approximation from the incentives that this agrarian structure generates on the predominance of the extensive ranching. These incentive dice the extensive ranching is the most feasible activity and understands itself as a consequence of the agrarian structure