In all the villages of this area, a two-year fallow system operates. One-half of the village land is sown one year, and the other left fallow and used for pasture (de Planhol (1958) pp. 3I7 ff.). The village herds and flocks are transferred from one side to the other after the harvest, to glean the harvested fields and eat the stubble. Soon after the completion of the harvest, autumn ploughing and sowing on the fallow land begins; the fields from which the crops have been reaped become fallow for the next year. This system prevents any individual from planting the same fields in successive years, except for a few walled fields immediately adjoining the village, where manuring and special crops make it agriculturally advantageous, and the animals can easily be kept off. Each man farms his own plots quite independently of his neighbours, so that he is free to plough and sow when he wishes, and to sow what crops he pleases. He may, should he wish, miss one or more turns of the cycle; that is, he can leave land fallow for three, five, or more, years instead of one, so long as he sows it in a year when it is part of the village pasture. On the other hand, he dare not lag behind his neighbours at the harvest, lest the flocks and herds are turned on to the land before his crops are reaped and away.