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Seed certification and maize, rice and cowpea productivity in Nigeria: An insight based on nationally representative farm household data and seed company location data

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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
 
Creator Takeshima, Hiroyuki
Abdoulaye, Tahirou
Andam, Kwaw S.
Edeh, Hyacinth O.
Fasoranti, Adetunji S.
Haile, Beliyou
Kumar, P. Lava
Nwagboso, Chibuzo
Ragasa, Catherine
Spielman, David J.
Wossen, Tesfamichael
 
Subject 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
 
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.
 
Date 2022-12-14
2023-01-17T08:14:00Z
2023-01-17T08:14:00Z
 
Type Working Paper
 
Identifier 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
https://hdl.handle.net/10568/127256
https://www.ifpri.org/publication/seed-certification-and-maize-rice-and-cowpea-productivity-nigeria-insight-based
https://doi.org/10.2499/p15738coll2.136474
 
Language en
 
Relation https://ebrary.ifpri.org/digital/collection/p15738coll2/id/134873/rec/1
https://ebrary.ifpri.org/digital/collection/p15738coll2/id/134441
https://ebrary.ifpri.org/digital/collection/p15738coll5/id/6385/rec/1
https://ebrary.ifpri.org/digital/collection/p15738coll5/id/4772/rec/1
https://ebrary.ifpri.org/digital/collection/p15738coll2/id/130730
IFPRI Discussion Paper
 
Rights Open Access
 
Format 39 p.
application/pdf
 
Publisher International Food Policy Research Institute