Head of the Division Agronomy since 1st of October, 2017

Strategies for increasing crop production while reducing its environmental footprint, impact of climate change and climate variability on crop growth and yield, crop modeling, development and analysis of big datasets on the use of water, land and nutrients for crop production, sole and combined effect of abiotic stress (drought, heat, frost, nutrient deficiency) on crop growth and yield, integrated assessment of drought risk and drought impact in crop production

Current projects
(2019 - 2022)
Enhancing productivity and nutrient efficiency in organic crop production by irrigation management (BOELN) (2018 - 2021)
GRoW GlobeDrought (2017 - 2020)
Development, update, and maintenance of the Digital Global Map of Irrigation Areas (1997 - )

PAG 0020 -- Scientific writing and publishing in crop sciences
M.Agr. 0001 -- Acker- und pflanzenbauliche Übungen
M.Agr. 0005 -- Crop production and pasture management
M.Agr. 0035 -- Methodisches Arbeiten: Interdisziplinäres Seminar
M.Agr. 0078 -- Umweltindikatoren und Ökobilanzen
B.Agr. 0014 -- Pflanzenbau
B.Agr. 0319 -- Wissenschaftliches Arbeiten und professionelles Präsentieren in der Pflanzenproduktion
B.Agr. 0323 -- Nachhaltigkeit von Produktionssystemen
B.Agr. 0329 -- Pflanzenbau und Pflanzenzüchtung
B.Agr. 0351 -- Übungen zur Nutzpflanzenkunde (from SS 2020)
B.Agr. 0365 -- Ökologischer Pflanzenbau (from SS 2020)

Selected publications
Qin, Y., N.D. Mueller, S. Siebert, R.B. Jackson, A. AghaKouchak, J.B. Zimmerman, D. Tong, C. Hong, S.J. Davis, 2019. Flexibility and intensity of global water use. Nature Sustainability 2, 515-523. DOI:10.1038/s41893-019-0294-2

Smith, W.K., E. Nelson, J.A. Johnson, S. Polasky, J.C. Milder, J.S. Gerber, P.C. West, S. Siebert, K.A. Brauman, K.M. Carlson, M. Arbuthnot, J.P. Rozza, D.N. Pennington, 2019. Voluntary sustainability standards could significantly reduce detrimental impacts of global agriculture. Proceedings of the National Academy of Sciences 116, 2130-2137. DOI:10.1073/pnas.1707812116

Webber, H., F. Ewert, J.E. Olesen, C. Müller, S. Fronzek, A.C. Ruane, M. Bourgault, P. Martre, B. Ababaei, M. Bindi, R. Ferrise, R. Finger, N. Fodor, C. Gabaldón-Leal, T. Gaiser, M. Jabloun, K.-C. Kersebaum, J.I. Lizaso, I.J. Lorite, L. Manceau, M. Moriondo, C. Nendel, A. Rodríguez, M. Ruiz-Ramos, M.A. Semenov, S. Siebert, T. Stella, P. Stratonovitch, G. Trombi, D. Wallach, 2018. Diverging importance of drought stress for maize and winter wheat in Europe. Nature Communications 9, 4249. DOI:10.1038/s41467-018-06525-2

Eyshi Rezaei, E., S. Siebert, H. Hüging, F. Ewert (2018). Climate change effect on wheat phenology depends on cultivar change. Scientific Reports 8, 4891. DOI:10.1038/s41598-018-23101-2

Heino, M., M. Puma, P. Ward, D. Gerten, V. Heck, S. Siebert, M. Kummu (2018). Two-thirds of global cropland area impacted by climate oscillations. Nature Communications 9, 1257. DOI:10.1038/s41467-017-02071-5

Siebert, S., H. Webber, G. Zhao, F. Ewert (2017). Heat stress is overestimated in climate impact studies for irrigated agriculture. Environmental Research Letters 12, 05402310. DOI:10.1088/1748-9326/aa702f

Kummu, M., J.H.A. Guillaume, H. de Moel, S. Eisner, M. Flörke, M. Porkka, S. Siebert, T.I.E. Veldkamp, P.J. Ward (2016). The world’s road to water scarcity: shortage and stress in the 20th century and pathways towards sustainability. Scientific Reports 6, 38495. DOI:10.1038/srep38495

Eyshi Rezaei, E., S. Siebert, F. Ewert (2015). Intensity of heat stress in winter wheat—phenology compensates for the adverse effect of global warming. Environmental Research Letters 10, 024012. DOI:10.1088/1748-9326/10/2/024012

Siebert, S., Kummu, M., Porkka, M., Döll, P., Ramankutty, N., Scanlon, B.R. (2015). A global data set of the extent of irrigated land from 1900 to 2005. Hydrology and Earth System Sciences 19, 1521-1545. DOI:10.5194/hess-19-1521-2015

West, P.C., Gerber, J.S., Mueller, N.D., Brauman, K.A., Carlson, K.M., Cassidy, E.S., Engstrom, P.M., Johnston, M., MacDonald, G.K., Ray, D.K., Siebert, S. (2014). Leverage points for improving food security and the environment. Science 345, 325-328. DOI:10.1126/science.1246067

Siebert, S., Ewert, F., Eyshi Rezaei, E., Kage, H., Graß, R. (2014). Impact of heat stress on crop yield—on the importance of considering canopy temperature. Environmental Research Letters 9, 044012. DOI:10.1088/1748-9326/9/4/044012

Siebert, S., Ewert, F. (2012). Spatio-temporal patterns of phenological development in Germany in relation to temperature and day length. Agricultural and Forest Meteorology 152(1), 44-57, DOI:10.1016/j.agrformet.2011.08.007

Foley, J.A., Ramankutty, N., Brauman, K.A., Cassidy, E.S., Gerber, J.S., Johnston, M., Mueller, N.D., O’Connell, C., Ray, D.K., West, P.C., Balze, C., Bennett, E.M., Carpenter, S.R., Hill, J., Monfreda, C., Polasky, S., Rockström, J. Sheehan, J., Siebert, S., Tilman, D., Zaks, D.P.M. (2011). Solutions for a cultivated planet. Nature 478, 337-342, DOI:10.1038/nature10452

Ellis, E.C., K.K. Goldewijk, S. Siebert, D. Lightman, N. Ramankutty, 2010. Anthropogenic transformation of the biomes, 1700 to 2000. Global Ecology and Biogeography 19, 589-606. DOI:10.1111/j.1466-8238.2010.00540.x

Additional information
Details at:
Personal website: http://www.simplace.net/home/siebert/
Research Gate: https://www.researchgate.net/profile/Stefan_Siebert2/
ORCID: http://orcid.org/0000-0002-9998-0672
Researcher ID: http://www.researcherid.com/rid/B-8621-2009