Complex sentence: The plan focused on rapid development of heavy industry and (eventually futile) collectivization of agriculture, the land was seized from prewar large landowners was redistributed to the poorer peasants-but subsequent attempts at taking the land from them met wide resentment.
Split into simpler sentences: The plan focused on rapid development of heavy industry and (eventually futile) collectivization of agriculture. The land seized from prewar large landowners was redistributed to the poorer peasants, but subsequent attempts at taking the land from farmers met wide resentment.