At this century, the primary sector got an enormous avance due to some innovations. The Norfolk system divided land into 4 plots, in wich different plants were cultivated. Some plants were for the farmers, and other ones for the animals, wich faeces were used as fertilizer. This replaced the fallow system, in wich farmers couldn't use a third of the land. Also, the land was given to the farmers and not to a superior entity (a noble), and new machines were invented, such as the iron plow.