"8242","18","archive","128",,,"disk0/00/00/82/42","2014-07-25 08:57:09","2017-10-31 03:35:02","2014-07-25 08:57:09","article",,,"show","Library-ICRISAT@CGIAR.ORG",,,"","","","","","","","","","",,,,"Homann-Kee Tui","S","","","","","","","Homann-Kee Tui","S","","","","",,,,,"","",,,,,"","","ICRISAT(Bulawayo)","Zimbabwe","Economic trade-offs of biomass use in crop-livestock systems: Exploring more sustainable options in semi-arid Zimbabwe","pub","s2.4","D6","crp1.1","restricted",,,"Crop-livestock intensification, Biomass trade-offs, Farm types, Economic impacts, Zimbabwe",,"The data for this paper were generated by the study on ‘Optimizing
livelihood and environmental benefits from CR in smallholder
crop-livestock system in Sub-Saharan Africa and South
Asia: South African case study’, supported by the Systemwide Livestock
Programme (SLP, Homann-Kee Tui et al., 2013). We thank the
CGIAR Research Programs Resilient Dryland Systems and Policies,
Institutions and Markets for support. Special thanks also to Roberto
Valdivia and John Antle for capacitating on TOA-MD, Albert Chirima
for GIS support, Swathi Sridharan for editing and the anonymous
reviewers for their constructive comments. The views
expressed in this paper are the authors’ and do not necessarily
reflect the views of the SLP or the authors’ institutions.","In complex mixed crop-livestock systems with limited resources and biomass scarcity, crop residues play an important but increasingly contested role. This paper focuses on farming systems in the semi-arid areas of Zimbabwe, where biomass production is limited and farmers integrate crop and livestock activities. Conservation Agriculture (CA) is promoted to intensify crop production, emphasizing the retention of surface mulch with crop residues (CR). This paper quantifies the associated potential economic trade-offs and profitability of using residues for soil amendment or as livestock feed, and explores alternative biomass production options. We draw on household surveys, stakeholder feedback, crop, livestock and economic modeling tools. We use the Trade-Off Analysis Model for Multi Dimensional Impact Assessment (TOA-MD) to compare different CR use scenarios at community level and for different farm types: particularly the current base system (cattle grazing of maize residues) and sustainable intensification alternatives based on a CA option (mulching using maize residues ± inorganic fertilizer) and a maize–mucuna (Mucuna pruriens) rotation. Our results indicate that a maize–mucuna rotation can reduce trade-offs between CR uses for feed and mulch, providing locally available organic soil enhancement, supplementary feed and a potential source of income. Conservation Agriculture without fertilizer application and at non-subsidized fertilizer prices is not financially viable; whereas with subsidized fertilizer it can benefit half the farm population. The poverty effects of all considered alternative biomass options are however limited; they do not raise income sufficiently to lift farmers out of poverty. Further research is needed to establish the competitiveness of alternative biomass enhancing technologies and the socio-economic processes that can facilitate sustainable intensification of mixed crop-livestock systems, particularly in semi-arid environments.","2015","published",,"Agricultural Systems","134",,"Elsevier Science Ltd",,"48-60",,,,,,,,,,,"TRUE",,"0308-521X",,,,,,"","http://dx.doi.org/10.1016/j.agsy.2014.06.009","http://scholar.google.co.in/scholar?as_q=%22Economic+trade-offs+of+biomass+use+in+crop-livestock+systems%3A+Exploring+more+sustainable+options+in+semi-arid+Zimbabwe%22&as_epq=&as_oq=&as_eq=&as_occt=title&as_sauthors=&as_publication=&as_ylo=&as_yhi=&btnG=&","pub",,"","",,,,,,"",,,,,,,"",,,,,"",,,,,"","",,,,,"","",,,,,
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