Kazakhstan

After World War II, a decision by the Soviet authorities plowed 250.000 square kilometers of the Kazakh steppe and turned it into farmland.

An excerpt from the article 32 facts about Kazakhstan

After the collapse of the Soviet Union and the collapse of the Kolkhozes, most of this land became uncultivated farmland. It is comforting to note the recent resurgence of the steppe's grassland ecosystem.