Carbon implications of Virgin Lands Campaign cropland expansion and post-Soviet agricultural land abandonment in Russia and Kazakhstan

Alexander V. Prishchepov1, Irina Kurganova2, Florian Schierhorn3, Valentin Lopes de Gerenyu2, Daniel Müller4, Yakov Kuzyakov5 and IAMO Land System Group, (1)University of Copenhagen, Copenhagen, Denmark, (2)Institute of physicochemical and biological problems in soil science, Laboratory of soil cycles of nitrogen and carbon, Puschino, Russia, (3)Leibniz Institute of Agricultural Development in Transition Economies, Structural Development of Farms and Rural Areas, Halle Saale, Germany, (4)Leibniz Institute of Agricultural Development in Transition Economies (IAMO), Structural Development of Farms and Rural Areas, Halle (Saale), Germany, (5)Department of Soil Science of Temperate Ecosystems, University of Göttingen, Göttingen, Germany