Paper · 2007 · CGSPace A Repository of Agricultural Research Outputs (Consultative Group for International Agricultural Research)

Gains from highyielding varieties with and without complementary technologies: the case of improved cowpea in northern Nigeria

Arega D. Alene; Victor M. Manyong

5
claims
10
verbatim quotes
5
citations
1
research areas
—
Not open access

Abstract

This paper examines the adoption and impact of selective and whole package adoption of improved cowpea involving new variety, insect control, fertilizer, and best bet cropping pattern in northern Nigeria. A farm income model that explicitly accounts for endogenous technology adoption was used to assess the impacts. Results show that adoption of the whole package, rather than adoption of selected components, had a significant impact on productivity and incomes, which was in turn due largely to the recommended cropping pattern. Education, credit, extension contact, access to improved seeds, and participation in on-farm technology evaluations are significantly related to the intensification of improved cowpea production. The paper concludes with implications for policy to enhance productivity and household incomes.

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The text the model read, with the source record’s inline markup (italics, sub- and superscripts) rendered and its character entities decoded; quote offsets refer to the raw text.

Claims 5

Intervention effectobservedoriginal resultpositivesignificant (as stated)simulated

Claim · model-written summary

Whole-package adoption significantly improved productivity compared with selected components.

Treatment
adoption of the whole packagee0
Outcome
productivitye0
Comparator
adoption of selected componentse0
Setting
northern Nigeriat0

Not reportedDirection

Organisms pictured · Representative pictures of the matched species, not figures from the paper.

Vigna unguiculata
Vigna unguiculata · TaxonHeraldDesa at English Wikipedia · CC BY-SA 3.0 · Wikimedia Commons ↗

Verbatim

e0

“Results show that adoption of the whole package, rather than adoption of selected components, had a significant impact on productivity and incomes”

✓ located verbatim in the source · abstract, characters 317–463 · show in text ↑
t0

“improved cowpea in northern Nigeria”

✓ located verbatim in the source · title, characters 91–126 · show in text ↑
Intervention effectobservedoriginal resultpositivesignificant (as stated)simulated

Claim · model-written summary

Whole-package adoption significantly affected incomes compared with selective adoption.

Treatment
adoption of the whole packagee0
Outcome
incomese0
Comparator
adoption of selected componentse0
Setting
northern Nigeriat0

Not reportedDirection

Organisms pictured · Representative pictures of the matched species, not figures from the paper.

Vigna unguiculata
Vigna unguiculata · TaxonHeraldDesa at English Wikipedia · CC BY-SA 3.0 · Wikimedia Commons ↗

Verbatim

e0

“Results show that adoption of the whole package, rather than adoption of selected components, had a significant impact on productivity and incomes”

✓ located verbatim in the source · abstract, characters 317–463 · show in text ↑
t0

“improved cowpea in northern Nigeria”

✓ located verbatim in the source · title, characters 91–126 · show in text ↑
Mechanismauthor interpretationoriginal resultsimulated

Claim · model-written summary

The recommended cropping pattern largely accounted for the impact of whole-package adoption.

Treatment
recommended cropping patterne0
Outcome
impact on productivity and incomese1

Organisms pictured · Representative pictures of the matched species, not figures from the paper.

Vigna unguiculata
Vigna unguiculata · TaxonHeraldDesa at English Wikipedia · CC BY-SA 3.0 · Wikimedia Commons ↗

Verbatim

e0

“which was in turn due largely to the recommended cropping pattern.”

✓ located verbatim in the source · abstract, characters 465–531 · show in text ↑
t0

“improved cowpea in northern Nigeria”

✓ located verbatim in the source · title, characters 91–126 · show in text ↑
e1

“significant impact on productivity and incomes”

✓ located verbatim in the source · abstract, characters 417–463 · show in text ↑
Associationobservedoriginal resultsignificant (as stated)measured

Claim · model-written summary

Education, credit and extension contact were significantly related to intensification of improved cowpea production.

Outcome
intensification of improved cowpea productione0
Qualifier
Education, credit, extension contacte0
Setting
northern Nigeriat0

Not reportedDirection

Organisms pictured · Representative pictures of the matched species, not figures from the paper.

Vigna unguiculata
Vigna unguiculata · TaxonHeraldDesa at English Wikipedia · CC BY-SA 3.0 · Wikimedia Commons ↗

Verbatim

e0

“Education, credit, extension contact, access to improved seeds, and participation in on-farm technology evaluations are significantly related to the intensification of improved cowpea production.”

✓ located verbatim in the source · abstract, characters 532–727 · show in text ↑
t0

“improved cowpea in northern Nigeria”

✓ located verbatim in the source · title, characters 91–126 · show in text ↑
Associationobservedoriginal resultsignificant (as stated)measured

Claim · model-written summary

Access to improved seeds and participation in on-farm evaluations were significantly related to intensification of improved cowpea production.

Material
improved seedse0
Outcome
intensification of improved cowpea productione0
Qualifier
participation in on-farm technology evaluationse0

Not reportedDirection

Organisms pictured · Representative pictures of the matched species, not figures from the paper.

Vigna unguiculata
Vigna unguiculata · TaxonHeraldDesa at English Wikipedia · CC BY-SA 3.0 · Wikimedia Commons ↗

Verbatim

e0

“Education, credit, extension contact, access to improved seeds, and participation in on-farm technology evaluations are significantly related to the intensification of improved cowpea production.”

✓ located verbatim in the source · abstract, characters 532–727 · show in text ↑

storage · yield · Vigna unguiculata (cowpea)Positive and negative results

8 papers: 7 positive, 1 negative or no effect

6 papers in the same direction as this paper · 1 in the opposite direction

  1. negative
  2. positive
  3. positive

4 papers more in this group

See all 8 papers →

Claims are grouped by organism, treatment and what was measured or targeted. A paper counts as positive when any of its claims in the group is positive.