Intervention effectmodel-written summary

Sole cowpea had lower seed yield than cowpea intercropped with tomato.

A claim from Observations on Insect Infestation and Damage in Cowpea (Vigna Unguiculata) Intercropped With Tomato (Lycopersicon Esculentum) in a Rain Forest Area of Nigeria · 1991

Intervention effectobservedoriginal resultpositivesignificant (as stated)measured

Claim · model-written summary

Sole cowpea had lower seed yield than cowpea intercropped with tomato.

Treatment
cowpea intercropped with tomatoe0
Outcome
seed yielde0
Direction
lowere0
Comparator
Sole cowpeae0

Not reportedMaterialGeneCompoundOrgan / stageInteractorInteractor roleSecond interactorSecond interactor roleSettingValueQualifier

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

“Sole cowpea had a significantly lower seed yield than cowpea intercropped with tomato”

✓ located verbatim in the source · abstract, characters 655–740

Title

Observations on Insect Infestation and Damage in Cowpea (Vigna Unguiculata) Intercropped With Tomato (Lycopersicon Esculentum) in a Rain Forest Area of Nigeria

T. I. Ofuya Experimental Agriculture 1991. doi:10.1017/s0014479700019384

Other claims from this paper (7)

Record rev-16b9f5b3752e8e00340255ac5f8573746645eca3052fd6b0a120a9ce62728d8c · schema claims-v0.9 · position 8 in the model’s answer

Solanum lycopersicum · yield · Vigna unguiculata (cowpea)Positive and negative results

3 papers: 2 positive, 1 negative or no effect

1 paper in the same direction as this claim · 1 in the opposite direction

  1. negative
    Cowpea growth and grim yields were significantly depressed in crop combinations, especially TC 2:1.

    Effect of Planting Pattern on Growth and Yield of Tomato-Cowpea Intercrops · 2001

    Opposite direction

  2. positive
    The tomato–cowpea 2:1 intercrop increased net returns over sole cowpea by N129, 823.22 or US$865.49(233.18%).

    Economic aspects of intercropping systems of vegetables (okra, tomato and cowpea) · 2011 · compared with sole cropping of tomato and cowpea

    Same direction

See all 3 papers →

intercropping · yield · Vigna unguiculata (cowpea)Results differ

103 papers: 63 positive, 40 negative or no effect

62 papers in the same direction as this claim · 33 in the opposite direction · 7 reporting no difference from an alternative

  1. negative
    Intercrop cowpea yields were less than sole cowpea yields at all sowings.

    Relative Sowing Time and Density of Component Crops in a Maize/Cowpea Intercrop System · 1987 · compared with sole cowpea yields

    Opposite direction

  2. negative
    Intercropping reduced cowpea seed yield from 3195 to 2170 kg ha −1 in 1981.

    Cassava‐Cowpea and Cassava‐Peanut Intercropping. I. Yield and Land Use Efficiency]1 · 1986

    Opposite direction

  3. no effect
    Cowpea grain yield was not significantly affected by intercropping.

    Effect Of Cowpea Planting Density On Growth, Yield And Productivity Of Component Crops In Cowpea/Cassava Intercropping System · 2008

    Opposite direction

  4. negative
    Fresh and dry forage yields of cowpea were lower when intercropped with maize than in sole cowpea.

    Effect Of Cowpea (Vigna Sinensis L.) With Maize (Zea Mays L.) Intercropping On Yield And Its Components · 2015 · compared with sole cowpea

    Opposite direction

  5. negative
    Intercropping reduced cowpea grain yield by up to 55%.

    Response of tomato and okra to nitrogen fertilizer in sole cropping and intercropping with cowpea · 1991

    Opposite direction

  6. no effect
    Cowpea density had no significant effect on harvest indices.

    Effects of Intercrop Population Density and Row Orientation on Growth and Yields of Sorghum - Cowpea Cropping Systems in Semi Arid Rongai, Kenya · 2014

    Opposite direction

  7. negative
    Sole crops had more pods per plant than intercrops.

    The effect of intercropping maize with cowpea and lablab on crop yield · 2013 · compared with sole crops

    Opposite direction

  8. negative
    Hedgerow intercropping gave lower cowpea yields than a crop rotation with legume cover crops.

    Crop yield, C and N balance of three types of cropping systems on an Ultisol in Northern Lampung · 2000 · compared with a crop rotation with legume cover crops

    Opposite direction

94 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.