Manorial System: A system within feudalism where manors were self-sufficient estates controlled by lords who had authority over the peasants living on them.
Serfdom: A condition in which peasants were legally bound to the land they worked on and were obligated to provide labor services to their lords.
Crop Rotation: A farming practice that involves growing different crops on the same piece of land in sequential seasons or years to improve soil fertility and prevent pest infestation.