Development in the rural economy, though certainly slow, was continuous from the 8th to the beginning of the 14th century. Areas close to the sea featuring cereal crops, vines, and olive groves (the interior of the Balkans, and Asia Minor concentrated on stock raising) were relatively well-favored, and appear to have played an important role in the development of the Byzantine economy. The peasantry's tools changed little through the ages, and remained rudimentary, which resulted in a low ratio of productivity to labor. Nevertheless, according to certain scholars, the permanence of techniques, and tools are evidence of their successful adaptation to the environment.