Paper · 2010 · Nigeria Agricultural Journal

Productivity of cocoyam/ cowpea intercropas influenced by cowpea growth habit

D.A Okpara; G Nwofia; G Chukwuekezie; et al.

9
claims
27
verbatim quotes
1
citations
1
research areas
✓
Open access

Abstract

Cocoyam was grown with vegetable cowpea in sole cropping and in intercropping to examine the effects of four contrasting vegetable cowpea growth habits on the productivity of the component crops in Umudike, southeastern Nigeria. The experiment was laid out in a randomized complete block design with three replications. Treatments comprised all combinations of cocoyam and four cowpea cultivars (spreading Akidi ani, climbing Akidi enu, semi erect IT81D-128-14 and erect IT86F-2014-1) and sole crops of each crop. On average, intercropping reduced cocoyam corm yield by 22% in spreading Akidi ani, 25% in semi erect IT81D- 128-14 and 41% in erect IT86F-2014-1. Similarly, intercropping reduced cowpea pod yield by 21% in erect IT86F-2014-1, 22% in climbing Akidi enu and 27% in semi erect IT81D-128-14. The climbing Akidi enu had the least adverse effect on corm yield and gave high pod yield, with a high combined average land equivalent ratio (LER) of 1.8.Keywords: Cocoyam, vegetable cowpea, growth habit, productivity

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Claims 9

Intervention effectobservedoriginal resultnegativemeasured

Claim · model-written summary

Intercropping reduced cocoyam corm yield by 22% in spreading Akidi ani relative to sole cropping.

Material
spreading Akidi anie1
Treatment
intercroppinge1
Outcome
corm yielde1
Direction
reducede1
Value
22%e1
Comparator
sole croppinge2
Setting
Umudike, southeastern Nigeriae0

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

Colocasia esculenta
Colocasia esculenta · TaxonDidier Descouens · CC BY-SA 4.0 · Wikimedia Commons ↗

Verbatim

e0

“productivity of the component crops in Umudike, southeastern Nigeria”

✓ located verbatim in the source · abstract, characters 159–227 · show in text ↑
e1

“On average, intercropping reduced cocoyam corm yield by 22% in spreading Akidi ani, 25% in semi erect IT81D- 128-14 and 41% in erect IT86F-2014-1”

✓ located verbatim in the source · abstract, characters 514–659 · show in text ↑
e2

“Cocoyam was grown with vegetable cowpea in sole cropping and in intercropping”

✓ located verbatim in the source · abstract, characters 0–77 · show in text ↑
Intervention effectobservedoriginal resultnegativemeasured

Claim · model-written summary

Intercropping reduced cocoyam corm yield by 25% in semi erect IT81D-128-14 relative to sole cropping.

Material
semi erect IT81D- 128-14e1
Treatment
intercroppinge1
Outcome
corm yielde1
Direction
reducede1
Value
25%e1
Comparator
sole croppinge2
Setting
Umudike, southeastern Nigeriae0

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

Colocasia esculenta
Colocasia esculenta · TaxonDidier Descouens · CC BY-SA 4.0 · Wikimedia Commons ↗

Verbatim

e0

“productivity of the component crops in Umudike, southeastern Nigeria”

✓ located verbatim in the source · abstract, characters 159–227 · show in text ↑
e1

“On average, intercropping reduced cocoyam corm yield by 22% in spreading Akidi ani, 25% in semi erect IT81D- 128-14 and 41% in erect IT86F-2014-1”

✓ located verbatim in the source · abstract, characters 514–659 · show in text ↑
e2

“Cocoyam was grown with vegetable cowpea in sole cropping and in intercropping”

✓ located verbatim in the source · abstract, characters 0–77 · show in text ↑
Intervention effectobservedoriginal resultnegativemeasured

Claim · model-written summary

Intercropping reduced cocoyam corm yield by 41% in erect IT86F-2014-1 relative to sole cropping.

Material
erect IT86F-2014-1e1
Treatment
intercroppinge1
Outcome
corm yielde1
Direction
reducede1
Value
41%e1
Comparator
sole croppinge2
Setting
Umudike, southeastern Nigeriae0

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

Colocasia esculenta
Colocasia esculenta · TaxonDidier Descouens · CC BY-SA 4.0 · Wikimedia Commons ↗

Verbatim

e0

“productivity of the component crops in Umudike, southeastern Nigeria”

✓ located verbatim in the source · abstract, characters 159–227 · show in text ↑
e1

“On average, intercropping reduced cocoyam corm yield by 22% in spreading Akidi ani, 25% in semi erect IT81D- 128-14 and 41% in erect IT86F-2014-1”

✓ located verbatim in the source · abstract, characters 514–659 · show in text ↑
e2

“Cocoyam was grown with vegetable cowpea in sole cropping and in intercropping”

✓ located verbatim in the source · abstract, characters 0–77 · show in text ↑
Intervention effectobservedoriginal resultnegativemeasured

Claim · model-written summary

Intercropping reduced pod yield of vegetable cowpea erect IT86F-2014-1 by 21% relative to sole cropping.

Material
erect IT86F-2014-1e4
Treatment
intercroppinge4
Outcome
pod yielde4
Direction
reducede4
Value
21%e4
Comparator
sole croppinge2
Setting
Umudike, southeastern Nigeriae0

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

“productivity of the component crops in Umudike, southeastern Nigeria”

✓ located verbatim in the source · abstract, characters 159–227 · show in text ↑
e2

“Cocoyam was grown with vegetable cowpea in sole cropping and in intercropping”

✓ located verbatim in the source · abstract, characters 0–77 · show in text ↑
e4

“Similarly, intercropping reduced cowpea pod yield by 21% in erect IT86F-2014-1, 22% in climbing Akidi enu and 27% in semi erect IT81D-128-14”

✓ located verbatim in the source · abstract, characters 661–801 · show in text ↑
Intervention effectobservedoriginal resultnegativemeasured

Claim · model-written summary

Intercropping reduced pod yield of vegetable cowpea climbing Akidi enu by 22% relative to sole cropping.

Material
climbing Akidi enue4
Treatment
intercroppinge4
Outcome
pod yielde4
Direction
reducede4
Value
22%e4
Comparator
sole croppinge2
Setting
Umudike, southeastern Nigeriae0

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

“productivity of the component crops in Umudike, southeastern Nigeria”

✓ located verbatim in the source · abstract, characters 159–227 · show in text ↑
e2

“Cocoyam was grown with vegetable cowpea in sole cropping and in intercropping”

✓ located verbatim in the source · abstract, characters 0–77 · show in text ↑
e4

“Similarly, intercropping reduced cowpea pod yield by 21% in erect IT86F-2014-1, 22% in climbing Akidi enu and 27% in semi erect IT81D-128-14”

✓ located verbatim in the source · abstract, characters 661–801 · show in text ↑
Intervention effectobservedoriginal resultnegativemeasured

Claim · model-written summary

Intercropping reduced pod yield of vegetable cowpea semi erect IT81D-128-14 by 27% relative to sole cropping.

Material
semi erect IT81D-128-14e4
Treatment
intercroppinge4
Outcome
pod yielde4
Direction
reducede4
Value
27%e4
Comparator
sole croppinge2
Setting
Umudike, southeastern Nigeriae0

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

“productivity of the component crops in Umudike, southeastern Nigeria”

✓ located verbatim in the source · abstract, characters 159–227 · show in text ↑
e2

“Cocoyam was grown with vegetable cowpea in sole cropping and in intercropping”

✓ located verbatim in the source · abstract, characters 0–77 · show in text ↑
e4

“Similarly, intercropping reduced cowpea pod yield by 21% in erect IT86F-2014-1, 22% in climbing Akidi enu and 27% in semi erect IT81D-128-14”

✓ located verbatim in the source · abstract, characters 661–801 · show in text ↑
Intervention effectobservedoriginal resultpositivemeasured

Claim · model-written summary

Climbing Akidi enu had the least adverse effect on cocoyam corm yield among the intercropped cowpea cultivars.

Material
climbing Akidi enue3
Treatment
intercroppinge2
Outcome
corm yielde3
Direction
least adversee3
Setting
Umudike, southeastern Nigeriae0

Not reportedComparator

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

Colocasia esculenta
Colocasia esculenta · TaxonDidier Descouens · CC BY-SA 4.0 · Wikimedia Commons ↗

Verbatim

e0

“productivity of the component crops in Umudike, southeastern Nigeria”

✓ located verbatim in the source · abstract, characters 159–227 · show in text ↑
e2

“Cocoyam was grown with vegetable cowpea in sole cropping and in intercropping”

✓ located verbatim in the source · abstract, characters 0–77 · show in text ↑
e3

“The climbing Akidi enu had the least adverse effect on corm yield and gave high pod yield, with a high combined average land equivalent ratio (LER) of 1.8”

✓ located verbatim in the source · abstract, characters 803–957 · show in text ↑
Intervention effectobservedoriginal resultpositivemeasured

Claim · model-written summary

Climbing Akidi enu gave high pod yield in the intercrop.

Taxon
vegetable cowpeae2
Material
climbing Akidi enue3
Treatment
intercroppinge2
Outcome
pod yielde3
Direction
highe3
Setting
Umudike, southeastern Nigeriae0

Not reportedComparator

Verbatim

e0

“productivity of the component crops in Umudike, southeastern Nigeria”

✓ located verbatim in the source · abstract, characters 159–227 · show in text ↑
e2

“Cocoyam was grown with vegetable cowpea in sole cropping and in intercropping”

✓ located verbatim in the source · abstract, characters 0–77 · show in text ↑
e3

“The climbing Akidi enu had the least adverse effect on corm yield and gave high pod yield, with a high combined average land equivalent ratio (LER) of 1.8”

✓ located verbatim in the source · abstract, characters 803–957 · show in text ↑
Observationobservedoriginal resultpositivemeasured

Claim · model-written summary

The combined average land equivalent ratio of the cocoyam intercrop was 1.8.

Outcome
land equivalent ratio (LER)e3
Value
1.8e3
Setting
Umudike, southeastern Nigeriae0

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

Colocasia esculenta
Colocasia esculenta · TaxonDidier Descouens · CC BY-SA 4.0 · Wikimedia Commons ↗

Verbatim

e0

“productivity of the component crops in Umudike, southeastern Nigeria”

✓ located verbatim in the source · abstract, characters 159–227 · show in text ↑
e2

“Cocoyam was grown with vegetable cowpea in sole cropping and in intercropping”

✓ located verbatim in the source · abstract, characters 0–77 · show in text ↑
e3

“The climbing Akidi enu had the least adverse effect on corm yield and gave high pod yield, with a high combined average land equivalent ratio (LER) of 1.8”

✓ located verbatim in the source · abstract, characters 803–957 · show in text ↑

intercropping · yield · Colocasia esculenta (taro)Results differ

7 papers: 5 positive, 2 negative or no effect

4 papers in the same direction as this paper · 2 in the opposite direction

  1. negative
  2. negative
  3. positive

3 papers more in this group

See all 7 papers →

intercropping · yield · Vigna unguiculata (cowpea)Results differ

103 papers: 63 positive, 40 negative or no effect

39 papers in the same direction as this paper · 63 in the opposite direction

  1. positive
  2. positive
  3. positive

99 papers more in this group

See all 103 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.