TY JOUR TI FARMING SYSTEM DEVELOPMENT IN THE SOUTH OF CENTRAL SIBERIA: LESSONS AND ISSUES KW agrolandscape KW agriculture KW arable land KW area under crops KW harvest KW crop KW deflation KW erosion JO Bulletin of KSAU AU Chebochakov, E.Y. PY 2013 IS PB Krasnoyarsk State Agrarian University