Complex sentence: This created many directly owned agricultural enterprises known as folwarks (feudal rent payments were replaced with forced labor on the lord's land), which limited the rights of cities and pushed most of the peasants into serfdom.
Split into simpler sentences: This created many directly owned agricultural enterprises known as folwarks in which feudal rent payments were replaced with forced labor on the lord's land. This limited the rights of cities and forced most of the peasants into serfdom.