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Review
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TFO Final Conference: “Sustainable Land Management – Challenges and Opportunities”, Berlin, Germany 7-9 March 2016
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TFO Final Dissemination Tour: Workshop in Huambo, Angola 27th July 2015
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TFO Final Dissemination Tour: Workshop in Chitembo, Angola 24th July 2015
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TFO Final Dissemination Tour: Workshops in Rundu and Mashare, Namibia, 20.-21. July 2015
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The Final TFO Dissemination Tour: 3rd Workshop Seronga 18 July
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The Final TFO Dissemination Tour: 2nd Workshop Maun 16 July
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TFO Final Dissemination Tour - Book Launch in Windhoek, Namibia, 13 July
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Workshop: Hamburg, Germany, 27 to 29 April 2015
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Workshop: Chitembo, Bie /Angola, 16 to 28 March 2015
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Mid-Term Seminar and 3rd Advisory Board Meeting October 8th, 2014 Bonn, Germany
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Forestry Research Day Semptember, 23rd 2014
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AZEF-Forum: Grahamtown, South Africa, 8 to 11 September 2014
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Workshop: Hamburg, Germany, 2-3 September 2014
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Training Workshop Mashare, 28 July to 8 August 2014
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Workshop: Hamburg, Germany, 4-5 June 2014
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Scientific symposium, Rundu, Namibia, 24 - 27 Feb 2014
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Scenario Meeting: Rundu, 27 February 2014
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Workshop: Hamburg, Germany, 19-22 November 2013
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Angola Meeting, Hamburg, Germany, 23 October 2013
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Workshop Trier, 26.-28. August 2013
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OBIS-Workshop, Jena, Germany, 22-23 May 2013
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LAMA status conference, Berlin, Germany, 17-19 Apr 2013
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Workshop Berlin, 16-17 Apr 2013
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Workshop Gießen, 7-8 Feb 2013
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AAKNet Workshop Nairobi, 5-6 February 2013
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Workshop Braunschweig, 31 January - 1 February 2013
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Workshop Hamburg, 11-12 Dec 2012
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Workshop Hamburg, 1-2 Nov 2012
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TFO review tour, 27-31 August 2012
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Workshop Luanda, 31 July - 3 August 2012
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Workshop Gießen, 6 June 2012
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Workshop Hamburg, 3-4 May 2012
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Workshop Braunschweig, 2-3 February 2012
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Workshop Marburg, 13 December 2011
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Workshop Maun, 11-13 October 2011
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Workshop Braunschweig, 2-3 March 2011
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Meeting Pevestorf, 9-10 September 2010
- Mediathek
- OBIS
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Ongoing Research
SP04 - Analysis of microbial nutrient cycling, GHG production, BNF and plant growth promotion for sustainable land use management
Fig. 1: In situ stimulation of microbial nutrient cycling on study plots representing different types of land management in the Kavango at Mashare station/Namibia. Repeated additions of different inorganic and organic nutrient sources (including ammonium nitrate, potassium phosphate, potassium phytate, artificial root exudates) were conducted over 6 days between November 1 and 6, 2011. After termination of the short-term stimulation experiments, samples were frozen in liquid nitrogen and transported back to DSMZ (Braunschweig) for analysis. During the current growing season, nutrient cycling on the same plots will be followed using the stable isotope pool dilution technique in cooperation with Dr. Percy Chimwamurombe (Microbiology and Molecular Biology, Faculty of Biological Sciences, University of Namibia).
Fig. 2: Long-term (November 2011 through February 2012) study of different agricultural practices on nutrient cycling in the Kavango at Mashare station/Namibia. Field trials with cow pea and maize were initiated in November 2011. In cooperation with Dr. Ibo Zimmermann (Department of Agriculture, Polytechnic of Namibia, Windhoek), traditional and conservative agricultural practices, including different fertilization and mulching schemes are tested on representative experimental plots that are maintained by local farmers. The multifactorial trials encompass 84 different sites. Before harvest, corresponding soil samples will be collected and the microbial activity, nutrient regeneration and nutrient cycling potential will be determined at DSMZ (Braunschweig).
Fig. 3: N 2-fixing symbiosis for pulses for more productive and sustainable agriculture. In fields of subsistence farmers in the Kavango region, local grain legumes are often poorly nodulated by rhizobial symbionts (Left, middle panel). This does not allow to obtain high yield potentials which can be reached by nitrogen fixation. In a screening of local grain legumes like cowpea, peanut and Bambara groundnut (University of Bremen), nodulated (arrow) plants were identified in cooperation with the Mashare Irrigation Center, Namibia (right panel). Rhizobia were isolated taxonomically characterized.
Fig. 4: N 2-fixing symbiosis for pulses for more productive and sustainable agriculture. Rhizobial isolates from Namibian local grain legumes were tested for nodulation of cowpea in N-free substrate (Kav. 7-2) (University of Bremen). In comparison to uninoculated plants (left), inoculated plants showed a positive response with respect to plant growth, N-status and nodulation. In cooperation with Dr. Ibo Zimmermann (Department of Agriculture, Polytechnic of Namibia, Windhoek), and M. Simfukwe and colleagues from Livelihoods Conservation Agriculture, Namibia, the rhizobial inoculant will be tested under field conditions with subsistence farmers at the Mashare site. The first on site inoculant test will start in December 2011.
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