2010
Djumaniyazova, Y., R. Sommer, N. Ibragimov, J. Ruzimov, J. Lamers, and P. Vlek.
2010.
Simulating water use and N response of winter wheat in the irrigated floodplains of Northwest Uzbekistan.
Field Crops Research,
116
: 239-251
.
2009
Mac Carthy, D.S., Sommer R. and P.L.G. Vlek.
2009.
Modeling the impacts of contrasting nutrient and residue management practices on grain yield of sorghum (Sorghum bicolour (L.) Moench) in a semi-arid region of Ghana using APSIM.
Field Crops Research,
113
: 105-115
.
2008
Sommer, R., Kienzler, K., Conrad, C., Ibragimov, N., Lamers, J.P.A., Martius, C. and P.L.G. Vlek.
2008.
Evaluation of CropSyst for simulating the potential yield of cotton in Uzbekistan.
Agronomy for Sustainable Development,
28(2)
: 345-354
.
Further Information
2007
Sommer, R., P.C. Wall and B. Govaerts.
2007.
Model-based assessment of maize cropping under conventional and zero-tillage in highland Mexico.
Soil & Tillage Research,
94
: 83-100
.
2005
Sommer, R., C. Martius, M. Müller, J.P.A. Lamers, G. Rücker, S. Shumilov, B. Tischbein and P.L.G. Vlek.
2005.
Integrated Farm-Scale Modelling of Land, Water and Resource Allocation in the Khorezm Region of Uzbekistan.
In: Proceedings of the International Conference “The Global Food & Product Chain – Dynamics, Innovations, Conflicts, Strategies”. Centre for Agriculture in the Tropics and Subtropics, University of Hohenheim, Stuttgart
2004
Sommer, R., P.L.G. Vlek, T.D.d.A. Sá, K. Vielhauer, R.d.F.R. Coelho, and H. Fölster.
2004.
Nutrient balance of shifting cultivation by burning or mulching in the Eastern Amazon – evidence for subsoil nutrient accumulation.
Nutrient Cycling in Agroecosystems,
68
: 257–271
.
2003
Sommer, R., J.W. White, P.C. Wall and K.D. Sayre.
2003.
Model-based assessment of maize cropping under conventional and zero-tillage in highland Mexico – preliminary results.
Poster presented at the 2003 Annual Meetings of the ASA-CSSA-SSSA, Denver
2001
Sommer, R., T.D. de A. Sá, K. Vielhauer, H. Fölster and P.L.G. Vlek.
2001.
Water and nutrient balance under slash-and-burn agriculture in the Eastern Amazon, Brazil - The role of a deep rooting fallow vegetation.
In: W.J.Horst, M.K.Schenk, A.Bürkert, N.Claassen, H.Flessa, W.B.Frommer, H.E.Goldbach, H.-W.Olfs, V.Römheld, U.Sattelmacher, U.Schmidhalter, S.Schubert, N.v.Wirén, and L.Wittenmeyer (eds.):
Plant Nutrition Food Security and Sustainability of Agro-Ecosystems through Basic and Applied Research.
Kluwer Academic Publishers.
1014-1015.
2000
Sommer, R.
2000.
Water and nutrient dynamic of slash-and-mulch agriculture in the Eastern Amazon.
Doctoral thesis at
Faculty of Agriculture, University of Göttingen.
Cuvillier Verlag Göttingen
Further Information