Seed certification and maize, rice and cowpea productivity in Nigeria: An insight based on nationally representative farm household data and seed company location data
Despite the potential importance of seed quality to agricultural productivity growth, many governments in sub-Saharan Africa lack the capacity to expand quality assurance systems even where there is expressed interest. This study aims to evidence the value of quality assurance systems with an analys...
| Autores principales: | , , , , , , , , , , |
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| Formato: | Artículo preliminar |
| Lenguaje: | Inglés |
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International Food Policy Research Institute
2022
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| Materias: | |
| Acceso en línea: | https://hdl.handle.net/10568/127256 |
| _version_ | 1855516394582441984 |
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| author | Takeshima, Hiroyuki Abdoulaye, Tahirou Andam, Kwaw S. Edeh, Hyacinth O. Fasoranti, Adetunji Haile, Beliyou Kumar, P. Lava Nwagboso, Chibuzo Ragasa, Catherine Spielman, David J. Wossen, Tesfamichael |
| author_browse | Abdoulaye, Tahirou Andam, Kwaw S. Edeh, Hyacinth O. Fasoranti, Adetunji Haile, Beliyou Kumar, P. Lava Nwagboso, Chibuzo Ragasa, Catherine Spielman, David J. Takeshima, Hiroyuki Wossen, Tesfamichael |
| author_facet | Takeshima, Hiroyuki Abdoulaye, Tahirou Andam, Kwaw S. Edeh, Hyacinth O. Fasoranti, Adetunji Haile, Beliyou Kumar, P. Lava Nwagboso, Chibuzo Ragasa, Catherine Spielman, David J. Wossen, Tesfamichael |
| author_sort | Takeshima, Hiroyuki |
| collection | Repository of Agricultural Research Outputs (CGSpace) |
| description | Despite the potential importance of seed quality to agricultural productivity growth, many governments in sub-Saharan Africa lack the capacity to expand quality assurance systems even where there is expressed interest. This study aims to evidence the value of quality assurance systems with an analysis of efforts to produce and distribute certified seed in Nigeria. We assess the associations between quantities of certified seeds produced and spatial variations in production locations proxied by headquarter locations of seed companies producing certified seeds, on the one hand, with spatial variations in the use of certified seed, yields, and output at the farm level, on the other hand. Our analysis covers three crops that are important to food security in Nigeria: maize, rice, and cowpea. Our analysis integrates information on seed quantities produced and locations of seed companies with nationally representative panel data from a survey of farm households and spatially explicit rainfall and temperature data. We find a positive relationship between certified seed production in proximity to farm households and farm-level use of certified seeds, yields, and output, although this effect is diminishing at the margin. These diminishing marginal effects may be partly due to two factors. First, the yield gains from certified seeds tend to vary considerably within each state, suggesting that either quality issues persist in the seed supply chain or farmers are not using complementary inputs or appropriate management techniques when using quality seed. Second, it may be that as certified seed becomes more available to farmers, its use spreads from higher-return farms to lower-return farms, thereby diminishing the gains on the extensive margin. Although more rigorous assessments of causal effects and cost-effectiveness are needed to validate these findings, these results are consistent with the hypothesis that there are diminishing returns to seed quality assurance. Policymakers, regulators, and seed providers may benefit from identifying optimal, crop-specific target quantities or rates for certified seed production rather than aiming for certification of all seed produced in a market. |
| format | Artículo preliminar |
| id | CGSpace127256 |
| institution | CGIAR Consortium |
| language | Inglés |
| publishDate | 2022 |
| publishDateRange | 2022 |
| publishDateSort | 2022 |
| publisher | International Food Policy Research Institute |
| publisherStr | International Food Policy Research Institute |
| record_format | dspace |
| spelling | CGSpace1272562025-12-02T21:03:24Z Seed certification and maize, rice and cowpea productivity in Nigeria: An insight based on nationally representative farm household data and seed company location data Takeshima, Hiroyuki Abdoulaye, Tahirou Andam, Kwaw S. Edeh, Hyacinth O. Fasoranti, Adetunji Haile, Beliyou Kumar, P. Lava Nwagboso, Chibuzo Ragasa, Catherine Spielman, David J. Wossen, Tesfamichael seed quality agriculture agricultural products agricultural productivity capacity development quality assurance analysis certified seed seed production yields input output analysis inputs maize rice cowpeas quantity controls households rain rainfall patterns precipitation temperature data geography marginal analysis cost effectiveness analysis government policy policy innovation policies cost benefit analysis productivity seeds Despite the potential importance of seed quality to agricultural productivity growth, many governments in sub-Saharan Africa lack the capacity to expand quality assurance systems even where there is expressed interest. This study aims to evidence the value of quality assurance systems with an analysis of efforts to produce and distribute certified seed in Nigeria. We assess the associations between quantities of certified seeds produced and spatial variations in production locations proxied by headquarter locations of seed companies producing certified seeds, on the one hand, with spatial variations in the use of certified seed, yields, and output at the farm level, on the other hand. Our analysis covers three crops that are important to food security in Nigeria: maize, rice, and cowpea. Our analysis integrates information on seed quantities produced and locations of seed companies with nationally representative panel data from a survey of farm households and spatially explicit rainfall and temperature data. We find a positive relationship between certified seed production in proximity to farm households and farm-level use of certified seeds, yields, and output, although this effect is diminishing at the margin. These diminishing marginal effects may be partly due to two factors. First, the yield gains from certified seeds tend to vary considerably within each state, suggesting that either quality issues persist in the seed supply chain or farmers are not using complementary inputs or appropriate management techniques when using quality seed. Second, it may be that as certified seed becomes more available to farmers, its use spreads from higher-return farms to lower-return farms, thereby diminishing the gains on the extensive margin. Although more rigorous assessments of causal effects and cost-effectiveness are needed to validate these findings, these results are consistent with the hypothesis that there are diminishing returns to seed quality assurance. Policymakers, regulators, and seed providers may benefit from identifying optimal, crop-specific target quantities or rates for certified seed production rather than aiming for certification of all seed produced in a market. 2022-12-14 2023-01-17T08:14:00Z 2023-01-17T08:14:00Z Working Paper https://hdl.handle.net/10568/127256 en https://doi.org/10.2499/p15738coll2.134873 https://doi.org/10.2499/p15738coll2.134441 https://doi.org/10.1111/agec.12466 https://doi.org/10.1080/15427528.2014.977476 https://hdl.handle.net/10568/148593 Open Access application/pdf International Food Policy Research Institute Takeshima, Hiroyuki; Abdoulaye, Tahirou; Andam, Kwaw S.; Edeh, Hyacinth O.; Fasoranti, Adetunji; Haile, Beliyou; Kumar, P. Lava; Nwagboso, Chibuzo; Ragasa, Catherine; Spielman, David J.; and Wossen, Tesfamichael. 2022. Seed certification and maize, rice and cowpea productivity in Nigeria: An insight based on nationally representative farm household data and seed company location data. IFPRI Discussion Paper 2147. Washington, DC: International Food Policy Research Institute (IFPRI). https://doi.org/10.2499/p15738coll2.136474. |
| spellingShingle | seed quality agriculture agricultural products agricultural productivity capacity development quality assurance analysis certified seed seed production yields input output analysis inputs maize rice cowpeas quantity controls households rain rainfall patterns precipitation temperature data geography marginal analysis cost effectiveness analysis government policy policy innovation policies cost benefit analysis productivity seeds Takeshima, Hiroyuki Abdoulaye, Tahirou Andam, Kwaw S. Edeh, Hyacinth O. Fasoranti, Adetunji Haile, Beliyou Kumar, P. Lava Nwagboso, Chibuzo Ragasa, Catherine Spielman, David J. Wossen, Tesfamichael Seed certification and maize, rice and cowpea productivity in Nigeria: An insight based on nationally representative farm household data and seed company location data |
| title | Seed certification and maize, rice and cowpea productivity in Nigeria: An insight based on nationally representative farm household data and seed company location data |
| title_full | Seed certification and maize, rice and cowpea productivity in Nigeria: An insight based on nationally representative farm household data and seed company location data |
| title_fullStr | Seed certification and maize, rice and cowpea productivity in Nigeria: An insight based on nationally representative farm household data and seed company location data |
| title_full_unstemmed | Seed certification and maize, rice and cowpea productivity in Nigeria: An insight based on nationally representative farm household data and seed company location data |
| title_short | Seed certification and maize, rice and cowpea productivity in Nigeria: An insight based on nationally representative farm household data and seed company location data |
| title_sort | seed certification and maize rice and cowpea productivity in nigeria an insight based on nationally representative farm household data and seed company location data |
| topic | seed quality agriculture agricultural products agricultural productivity capacity development quality assurance analysis certified seed seed production yields input output analysis inputs maize rice cowpeas quantity controls households rain rainfall patterns precipitation temperature data geography marginal analysis cost effectiveness analysis government policy policy innovation policies cost benefit analysis productivity seeds |
| url | https://hdl.handle.net/10568/127256 |
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