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dc.contributor.authorNhamo, N.en_US
dc.contributor.authorRodenburg, J.en_US
dc.contributor.authorZenna, N.en_US
dc.contributor.authorMakombe, G.en_US
dc.contributor.authorLuzi-Kihupi, A.en_US
dc.date.accessioned2016-07-11T08:42:03Zen_US
dc.date.available2016-07-11T08:42:03Zen_US
dc.date.issued2014en_US
dc.identifier.citationNhamo, N., Rodenburg, J., Zenna, N., Makombe, G. & Luzi-Kihupi, A. (2014). Narrowing the rice yield gap in East and Southern Africa: using and adapting existing technologies. Agricultural Systems, 131, 45-55.en_US
dc.identifier.issn0308-521Xen_US
dc.identifier.urihttps://hdl.handle.net/10568/76106en_US
dc.description.abstractThe importance of rice production in sub-Saharan Africa (SSA) has significantly increased over the past decades. Currently, rice plays a pivotal role in improving household food security and national economies in SSA. However, current rice productivity of smallholder farms is low due to a myriad of production constraints and suboptimal production methods, while future productivity is threatened by climate change, water shortage and soil degradation. Improved rice cultivars and agronomic management techniques, to enhance nutrient and water availability and use efficiencies and to control weeds, have the potential to increase yields. The aim of this study was to assess the relative contribution of such technologies to enhanced rice productivity. Relative yield gains emanating from nutrient, water and weed management were surveyed and calculated from literature. Partial budgeting was used to evaluate viability of fertilizer technology under GAP. Substantial yield gains ranging from 0.5 t ha1 to 2.9 t ha1 are projected following the use of improved technologies. Relative yield gains decreased in the following order: weed management (91.6%) > organic fertilizer application (90.4%) > bunding (86.7%) > mineral fertilizer application (51.9%) > tied ridges (42.6%). Combining fertilizer with unimproved rice cultivars led to negative returns. The lack of integration of improved technologies, to increase synergies and alleviate socio-economic constraints, largely explained the existing yield gaps. The gains obtained through improved rice cultivars can be further enhanced through application of Good Agricultural Practices (GAP), improving nutrient, water and weed management technologies, based on the local resource availabilities of small farms. We therefore propose adapting technologies to local conditions and developing and using rice production decision tools based on GAP to enable rice farmers in SSA to improve resource-use efficiencies and crop productivity at the farm level. The importance of rice production in sub-Saharan Africa (SSA) has significantly increased over the past decades. Currently, rice plays a pivotal role in improving household food security and national economies in SSA. However, current rice productivity of smallholder farms is low due to a myriad of production constraints and suboptimal production methods, while future productivity is threatened by climate change, water shortage and soil degradation. Improved rice cultivars and agronomic management techniques, to enhance nutrient and water availability and use efficiencies and to control weeds, have the potential to increase yields. The aim of this study was to assess the relative contribution of such technologies to enhanced rice productivity. Relative yield gains emanating from nutrient, water and weed management were surveyed and calculated from literature. Partial budgeting was used to evaluate viability of fertilizer technology under GAP. Substantial yield gains ranging from 0.5 t ha1 to 2.9 t ha1 are projected following the use of improved technologies. Relative yield gains decreased in the following order: weed management (91.6%) > organic fertilizer application (90.4%) > bunding (86.7%) > mineral fertilizer application (51.9%) > tied ridges (42.6%). Combining fertilizer with unimproved rice cultivars led to negative returns. The lack of integration of improved technologies, to increase synergies and alleviate socio-economic constraints, largely explained the existing yield gaps. The gains obtained through improved rice cultivars can be further enhanced through application of Good Agricultural Practices (GAP), improving nutrient, water and weed management technologies, based on the local resource availabilities of small farms. We therefore propose adapting technologies to local conditions and developing and using rice production decision tools based on GAP to enable rice farmers in SSA to improve resource-use efficiencies and crop productivity at the farm level. The importance of rice production in sub-Saharan Africa (SSA) has significantly increased over the past decades. Currently, rice plays a pivotal role in improving household food security and national economies in SSA. However, current rice productivity of smallholder farms is low due to a myriad of production constraints and suboptimal production methods, while future productivity is threatened by climate change, water shortage and soil degradation. Improved rice cultivars and agronomic management techniques, to enhance nutrient and water availability and use efficiencies and to control weeds, have the potential to increase yields. The aim of this study was to assess the relative contribution of such technologies to enhanced rice productivity. Relative yield gains emanating from nutrient, water and weed management were surveyed and calculated from literature. Partial budgeting was used to evaluate viability of fertilizer technology under GAP. Substantial yield gains ranging from 0.5 t ha1 to 2.9 t ha1 are projected following the use of improved technologies. Relative yield gains decreased in the following order: weed management (91.6%) > organic fertilizer application (90.4%) > bunding (86.7%) > mineral fertilizer application (51.9%) > tied ridges (42.6%). Combining fertilizer with unimproved rice cultivars led to negative returns. The lack of integration of improved technologies, to increase synergies and alleviate socio-economic constraints, largely explained the existing yield gaps. The gains obtained through improved rice cultivars can be further enhanced through application of Good Agricultural Practices (GAP), improving nutrient, water and weed management technologies, based on the local resource availabilities of small farms. We therefore propose adapting technologies to local conditions and developing and using rice production decision tools based on GAP to enable rice farmers in SSA to improve resource-use efficiencies and crop productivity at the farm level. The importance of rice production in sub-Saharan Africa (SSA) has significantly increased over the past decades. Currently, rice plays a pivotal role in improving household food security and national economies in SSA. However, current rice productivity of smallholder farms is low due to a myriad of production constraints and suboptimal production methods, while future productivity is threatened by climate change, water shortage and soil degradation. Improved rice cultivars and agronomic management techniques, to enhance nutrient and water availability and use efficiencies and to control weeds, have the potential to increase yields. The aim of this study was to assess the relative contribution of such technologies to enhanced rice productivity. Relative yield gains emanating from nutrient, water and weed management were surveyed and calculated from literature. Partial budgeting was used to evaluate viability of fertilizer technology under GAP. Substantial yield gains ranging from 0.5 t ha1 to 2.9 t ha1 are projected following the use of improved technologies. Relative yield gains decreased in the following order: weed management (91.6%) > organic fertilizer application (90.4%) > bunding (86.7%) > mineral fertilizer application (51.9%) > tied ridges (42.6%). Combining fertilizer with unimproved rice cultivars led to negative returns. The lack of integration of improved technologies, to increase synergies and alleviate socio-economic constraints, largely explained the existing yield gaps. The gains obtained through improved rice cultivars can be further enhanced through application of Good Agricultural Practices (GAP), improving nutrient, water and weed management technologies, based on the local resource availabilities of small farms. We therefore propose adapting technologies to local conditions and developing and using rice production decision tools based on GAP to enable rice farmers in SSA to improve resource-use efficiencies and crop productivity at the farm level. The importance of rice production in sub-Saharan Africa (SSA) has significantly increased over the past decades. Currently, rice plays a pivotal role in improving household food security and national economies in SSA. However, current rice productivity of smallholder farms is low due to a myriad of production constraints and suboptimal production methods, while future productivity is threatened by climate change, water shortage and soil degradation. Improved rice cultivars and agronomic management techniques, to enhance nutrient and water availability and use efficiencies and to control weeds, have the potential to increase yields. The aim of this study was to assess the relative contribution of such technologies to enhanced rice productivity. Relative yield gains emanating from nutrient, water and weed management were surveyed and calculated from literature. Partial budgeting was used to evaluate viability of fertilizer technology under GAP. Substantial yield gains ranging from 0.5 t ha1 to 2.9 t ha1 are projected following the use of improved technologies. Relative yield gains decreased in the following order: weed management (91.6%) > organic fertilizer application (90.4%) > bunding (86.7%) > mineral fertilizer application (51.9%) > tied ridges (42.6%). Combining fertilizer with unimproved rice cultivars led to negative returns. The lack of integration of improved technologies, to increase synergies and alleviate socio-economic constraints, largely explained the existing yield gaps. The gains obtained through improved rice cultivars can be further enhanced through application of Good Agricultural Practices (GAP), improving nutrient, water and weed management technologies, based on the local resource availabilities of small farms. We therefore propose adapting technologies to local conditions and developing and using rice production decision tools based on GAP to enable rice farmers in SSA to improve resource-use efficiencies and crop productivity at the farm level. The importance of rice production in sub-Saharan Africa (SSA) has significantly increased over the past decades. Currently, rice plays a pivotal role in improving household food security and national economies in SSA. However, current rice productivity of smallholder farms is low due to a myriad of production constraints and suboptimal production methods, while future productivity is threatened by climate change, water shortage and soil degradation. Improved rice cultivars and agronomic management techniques, to enhance nutrient and water availability and use efficiencies and to control weeds, have the potential to increase yields. The aim of this study was to assess the relative contribution of such technologies to enhanced rice productivity. Relative yield gains emanating from nutrient, water and weed management were surveyed and calculated from literature. Partial budgeting was used to evaluate viability of fertilizer technology under GAP. Substantial yield gains ranging from 0.5 t ha1 to 2.9 t ha1 are projected following the use of improved technologies. Relative yield gains decreased in the following order: weed management (91.6%) > organic fertilizer application (90.4%) > bunding (86.7%) > mineral fertilizer application (51.9%) > tied ridges (42.6%). Combining fertilizer with unimproved rice cultivars led to negative returns. The lack of integration of improved technologies, to increase synergies and alleviate socio-economic constraints, largely explained the existing yield gaps. The gains obtained through improved rice cultivars can be further enhanced through application of Good Agricultural Practices (GAP), improving nutrient, water and weed management technologies, based on the local resource availabilities of small farms. We therefore propose adapting technologies to local conditions and developing and using rice production decision tools based on GAP to enable rice farmers in SSA to improve resource-use efficiencies and crop productivity at the farm level.en_US
dc.language.isoenen_US
dc.sourceAgricultural Systemsen_US
dc.subjectSOIL DEGRADATIONen_US
dc.subjectCULTIVARSen_US
dc.subjectSYSTEMSen_US
dc.titleNarrowing the rice yield gap in East and Southern Africa: using and adapting existing technologiesen_US
dc.description.versionPeer Reviewen_US
dc.typeJournal Articleen_US
cg.authorship.typesCGIAR and developing country instituteen_US
cg.subject.iitaRICEen_US
cg.identifier.statusLimited Accessen_US
cg.contributor.affiliationInternational Institute of Tropical Agricultureen_US
cg.contributor.affiliationUniversity of Limpopoen_US
cg.contributor.affiliationSokoine University of Agricultureen_US
cg.fulltextstatusFormally Publisheden_US
cg.identifier.doihttps://dx.doi.org/10.1016/j.agsy.2014.08.003en_US
cg.isijournalISI Journalen_US
cg.coverage.regionEAST AFRICAen_US
cg.coverage.regionSOUTHERN AFRICAen_US


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