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Registro Completo |
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Biblioteca(s): |
Embrapa Cerrados. |
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Data corrente: |
24/08/2016 |
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Data da última atualização: |
24/08/2016 |
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Tipo da produção científica: |
Artigo em Periódico Indexado |
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Autoria: |
RUSINAMHODZI, L.; DAHLIN, S.; CORBEELS, M. |
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Afiliação: |
MARC CORBEELS, CIRAD CPAC. |
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Título: |
Living within their means: Reallocation of farm resources can help smallholder farmers improve crop yields and soil fertility. |
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Ano de publicação: |
2016 |
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Fonte/Imprenta: |
Agriculture, Ecosystems and Environment, v. 216, p. 125-136, 2016. |
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DOI: |
10.1016/j.agee.2015.09.033 |
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Idioma: |
Inglês |
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Conteúdo: |
Abstract: Slash and burn agriculture is no longer feasible due to the rising population pressure and a dwindling resource base. Crop production intensification is required to produce more food per unit area of land, while rebuilding soil fertility. We explored the impact of reallocation of limited resources on crop productivity across farms of different resource endowment in central Mozambique. The results suggested that decreasing the cropped area and concentrating resources (fertiliser, manure and labour within the farmers' means) to smaller fields can increase total farm maize production for poor as well as relatively richer farmers in central Mozambique, but that the fertility of the retained and abandoned land is important for the overall outcome. Concentrating resources to smaller areas would in most cases also lead to increased concentrations of soil organic carbon (SOC), indicating positive effects on soil fertility and crop productivity in the long term. However, this apparently does not apply when only fertiliser is used and if harvest residues and weeds are removed or burnt. Organic inputs are thus also required, such as retention of crop residues, and applications of manure if available can further increase SOC. The study has revealed that sustainable intensification or crop production requires that multiple constraints be addressed simultaneously. Success of crop intensification options will also depend on proper targeting to different farm types as well as variability in soil fertility. Differences in resource ownership and bio-physical circumstances lead to different opportunities for individual farmers even within the same area. While targeted interventions for individual farmers might not be feasible, targeting defined farmer/endowment groups may be a sustainable pathway to increase productivity. Although smallholder farmers in sub-Saharan Africa (SSA) have limited assets, the study revealed opportunities to increase crop productivity without substantial capital inputs, but more efficient use and targeting. MenosAbstract: Slash and burn agriculture is no longer feasible due to the rising population pressure and a dwindling resource base. Crop production intensification is required to produce more food per unit area of land, while rebuilding soil fertility. We explored the impact of reallocation of limited resources on crop productivity across farms of different resource endowment in central Mozambique. The results suggested that decreasing the cropped area and concentrating resources (fertiliser, manure and labour within the farmers' means) to smaller fields can increase total farm maize production for poor as well as relatively richer farmers in central Mozambique, but that the fertility of the retained and abandoned land is important for the overall outcome. Concentrating resources to smaller areas would in most cases also lead to increased concentrations of soil organic carbon (SOC), indicating positive effects on soil fertility and crop productivity in the long term. However, this apparently does not apply when only fertiliser is used and if harvest residues and weeds are removed or burnt. Organic inputs are thus also required, such as retention of crop residues, and applications of manure if available can further increase SOC. The study has revealed that sustainable intensification or crop production requires that multiple constraints be addressed simultaneously. Success of crop intensification options will also depend on proper targeting to different farm types as well as vari... Mostrar Tudo |
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Palavras-Chave: |
Consórcio milho e legumes; Insumos de nutrientes; Intensificação; Pressão de ervas daninhas; Recursos limitados; Rendimento de colheita; Tipologias agrícolas. |
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Thesagro: |
Agricultura Familiar; Fertilidade do Solo. |
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Categoria do assunto: |
B Sociologia Rural |
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Marc: |
LEADER 02924naa a2200265 a 4500
001 2051541
005 2016-08-24
008 2016 bl uuuu u00u1 u #d
024 7 $a10.1016/j.agee.2015.09.033$2DOI
100 1 $aRUSINAMHODZI, L.
245 $aLiving within their means$bReallocation of farm resources can help smallholder farmers improve crop yields and soil fertility.
260 $c2016
520 $aAbstract: Slash and burn agriculture is no longer feasible due to the rising population pressure and a dwindling resource base. Crop production intensification is required to produce more food per unit area of land, while rebuilding soil fertility. We explored the impact of reallocation of limited resources on crop productivity across farms of different resource endowment in central Mozambique. The results suggested that decreasing the cropped area and concentrating resources (fertiliser, manure and labour within the farmers' means) to smaller fields can increase total farm maize production for poor as well as relatively richer farmers in central Mozambique, but that the fertility of the retained and abandoned land is important for the overall outcome. Concentrating resources to smaller areas would in most cases also lead to increased concentrations of soil organic carbon (SOC), indicating positive effects on soil fertility and crop productivity in the long term. However, this apparently does not apply when only fertiliser is used and if harvest residues and weeds are removed or burnt. Organic inputs are thus also required, such as retention of crop residues, and applications of manure if available can further increase SOC. The study has revealed that sustainable intensification or crop production requires that multiple constraints be addressed simultaneously. Success of crop intensification options will also depend on proper targeting to different farm types as well as variability in soil fertility. Differences in resource ownership and bio-physical circumstances lead to different opportunities for individual farmers even within the same area. While targeted interventions for individual farmers might not be feasible, targeting defined farmer/endowment groups may be a sustainable pathway to increase productivity. Although smallholder farmers in sub-Saharan Africa (SSA) have limited assets, the study revealed opportunities to increase crop productivity without substantial capital inputs, but more efficient use and targeting.
650 $aAgricultura Familiar
650 $aFertilidade do Solo
653 $aConsórcio milho e legumes
653 $aInsumos de nutrientes
653 $aIntensificação
653 $aPressão de ervas daninhas
653 $aRecursos limitados
653 $aRendimento de colheita
653 $aTipologias agrícolas
700 1 $aDAHLIN, S.
700 1 $aCORBEELS, M.
773 $tAgriculture, Ecosystems and Environment$gv. 216, p. 125-136, 2016.
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