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agricultural Arctic Arctic Ocean Asiatic Baku Baltic Batumi Belorussia belt Black Sea boundaries brackets indicate percentage Caspian cent centres Cereals climate coking coal cotton crops decline desert districts Dnepr Donbass East eastern economic regions European plain European Russia European U.S.S.R. expansion farming Figures in brackets forest zone frontier groups growth important increase industry Karaganda Kazakh Kazakh Upland Kazakhstan Khrebet Kola peninsula Kuzbass land latitude latter less mainly major million tons Moscow Moscow basin mountain national average nearly North Caucasus north-west northern oblasts output particularly period Plateau population Pptn production railway rainfall range rapid republics rivers Russian Empire semi-desert Siberia Slav soil south-west southern southward Soviet Central Asia Soviet Union sown area steppe Table taiga Tatars temperatures territory textile timber Transcaucasia transport Turkic Ukraine Urals urban vegetation Volga Vozvyshennost West Siberian Lowland western wooded steppe Yenisey