🌾 Oka–Don Lowland

The Oka–Don Lowlands, is a flat plain in European Russia, bounded on the north by the Oka River, on the south by the Don River, on the west by the Central Russian Upland, and on the east by the Volga Upland. The area is part of the larger East European Plain. The terrain is flat, with altitude averaging 160 meters above sea level, and the rivers meander on broad floodplains. Agricultural use of the plain is high, mostly for grain growing – wheat, barley and rye. The plain provides a flat south–north route for transportation, situated between uplands. Until a line of forts was built across the territory by the Russian government in the 1640s, the plain was a route for Tatar invasion from the south.