Intervention effectmodel-written summary

Inoculant followed by P and K fertilizer was effective for cowpea growth in field conditions.

A claim from Combined Application of Inoculant, Phosphorus and Potassium Enhances Cowpea Yield in Savanna Soils · 2020

Intervention effectobservedoriginal resultpositivemeasured

Claim · model-written summary

Inoculant followed by P and K fertilizer was effective for cowpea growth in field conditions.

Treatment
Bradyrhizobia inoculant followed by P and K fertilizere0
Interactor
Bradyrhizobiae0symbiont
Outcome
cowpea growthe0
Direction
effectivee0
Setting
field conditionse0

Not reportedMaterialGeneCompoundOrgan / stageSecond interactorSecond interactor roleComparatorValueQualifier

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

“application of Bradyrhizobia inoculant followed by P and K fertilizer was effective for cowpea growth in field conditions”

✓ located verbatim in the source · abstract, characters 1237–1358

Title

Combined Application of Inoculant, Phosphorus and Potassium Enhances Cowpea Yield in Savanna Soils

Obianuju Chiamaka Emmanuel; Olayiwola Akin Akintola; Francis Marthy Tetteh; et al. Agronomy 2020. doi:10.3390/agronomy11010015

Other claims from this paper (3)

Record rev-fd8022cab1d765e2f6707be6fd9fddce26bf6f74935c9185f0be1446d70a48df · schema claims-v0.9 · position 4 in the model’s answer

phosphorus · growth · Vigna unguiculata (cowpea)Results differ

56 papers: 52 positive, 4 negative or no effect

51 papers in the same direction as this claim · 4 in the opposite direction

  1. positive
    Phosphorus increased cowpea shoot dry weight and shoot and grain nitrogen content across locations.

    Growth and Yield Responses of Cowpea to Inoculation and Phosphorus Fertilization in Different Environments · 2017

    Same directionCited by this paper

  2. negative
    Leaf area of cowpea was reduced under low P

    Acid phosphatase activity in bean and cowpea plants grown under phosphorus stress · 1994 · compared with 1.0

    Opposite direction

  3. negative
    Phosphorus combined with different doses of manipueira had a negative effect on the initial development (V4 stage) of cowpea in a greenhouse, relative to mineral fertilization.

    Growth and formation of bean phytomass (Vigna unguiculata L.) fertilized with mineral fertilizer and manipueira · 2018 · compared with mineral fertilization

    Opposite direction

  4. no effect
    Plant height and leaf number did not vary with varieties or phosphorus.

    Response of fodder cowpea (Vigna unguiculata) varieties to application of phosphorus · 2001

    Opposite direction

  5. no effect
    Phosphorus did not significantly affect cowpea growth parameters.

    Performance of cowpea varieties under different phosphorus levels and spacing in Tanzania · 2025

    Opposite direction

  6. positive
    Phosphorus application significantly improved cowpea growth.

    Organic acids in the rhizosphere and root characteristics of soybean (Glycine max) and cowpea (Vigna unguiculata) in relation to phosphorus uptake in poor savanna soils · 2008

    Same direction

  7. positive
    Phosphorus application significantly enhanced shoot and root dry weight and total biomass of cowpea genotypes.

    Phosphorus Response Efficiency in Cowpea Genotypes · 2011

    Same direction

  8. positive
    Single super phosphate gave a higher total biomass than phosphate rocks in maize and cowpea.

    Effects of phosphate rock application on dry matter yield and phosphorus recovery of maize and cowpea grown in sequence · 2010 · compared with phosphate rocks (PR)

    Same direction

47 papers more in this group

See all 56 papers →

potassium · growth · Vigna unguiculata (cowpea)Positive and negative results

19 papers: 18 positive, 1 negative or no effect

17 papers in the same direction as this claim · 1 in the opposite direction

  1. positive
    Potassium promoted growth of both mungbean and cowpea under suboptimal soil moisture.

    Influence of Soil Moisture and Fertilizer Potassium on the Vegetative Growth of Mungbean (Vigna radiata L. Wilczek) and Cowpea (Vigna unguiculata L. Walp) · 2001

    Same directionCited by this paper

  2. negative
    Higher potassium rates with salinity depressed main stem growth relative to salinity alone.

    Growth and gas exchange in the cowpea under saline irrigation and rates of potassium = Crescimento e trocas gasosas de plantas de feijão-caupi sob irrigação salina e doses de potássio · 2015 · compared with isolated effect of salinity

    Opposite direction

  3. positive
    Cowpea dry matter increased significantly at 100 ppm humic acid and 300 kg/ha potassium.

    The effect of different levels of humic acid and potassium fertilizer on physiological indices of growth · 2014

    Same direction

  4. positive
    T6 produced significantly higher plant height (204.6 cm) in fodder cowpea or postharvest soil.

    Effect of Organic and Inorganic Nutrient Sources on Growth, Yield, Nutrient Uptake and Economics of Fodder Cowpea [Vigna unguiculata (L.) Walp.] · 2020

    Same direction

  5. positive
    Low potassium alone significantly reduced cowpea shoot and leaf biomass.

    Influence of ultraviolet-B enhanced solar radiation on growth and photosynthesis of potassium deficient cowpea seedlings · 1999

    Same directionAbout lacking this nutrient, so it counts the other way round

  6. positive
    Potassium up to 129 kg. h-1 significantly increased plant length to 53.33 cm versus control.

    Response of Three Varieties of Cowpea( Vigna sinensis L.) to Different levels of potassium fertilizer under southern region conditions of Iraq · 2019 · compared with control

    Same direction

  7. positive
    The combined amendments increased plant fresh and dry weight.

    Effect of Feldspar, Compost and Biochar on Cultivating Cowpea (Vigna unguiculata ssp. unguiculata) Plant and Soil Sandy Clay Loam Properties · 2022

    Same direction

  8. positive
    Potassium at 72 kgK2O/Fed. significantly increased cowpea plant height and branch and leaf numbers relative to control and lower levels.

    Response of Growth and Productivity of Cowpea Plants to Nano Mixture of Micronutrients Under Different Potassium Sulphate Fertilizer Rates · 2020 · compared with control and the lowest levels under study

    Same direction

10 papers more in this group

See all 19 papers →

inoculation · growth · Vigna unguiculata (cowpea)Positive and negative results

102 papers: 92 positive, 10 negative or no effect

91 papers in the same direction as this claim · 8 in the opposite direction · 2 reporting no difference from an alternative

  1. positive
    Inoculation increased cowpea shoot dry weight and shoot and grain nitrogen content across locations.

    Growth and Yield Responses of Cowpea to Inoculation and Phosphorus Fertilization in Different Environments · 2017

    Same directionCited by this paper

  2. positive
    Adding Bradyrhizobium inoculant to P and cattle manure increased cowpea shoot biomass from 1437 to 1813 kg ha−1.

    Combined application of inoculant, phosphorus and organic manure improves grain yield of cowpea · 2019

    Same directionCited by this paper

  3. no effect
    None of the inoculated strains promoted cowpea stem or foliage growth.

    Endophytic and rhizospheric bacteria from Opuntia ficus-indica mill and their ability to promote plant growth in cowpea, Vigna unguiculata (L.) Walp · 2012

    Opposite direction

  4. negative
    Salmonella inoculation reduced cowpea germination when soak water contained at least the stated concentration.

    CURING OF SALMONELLA ENTERICA, SEROVAR TYPHIMURIUM-CONTAMINATED COWPEA SEEDS AND SPROUTS WITH VINEGAR AND CHLORINATION · 2005

    Opposite direction

  5. no effect
    Rhizobium inoculation did not significantly affect biomass partitioning coefficients.

    Effect of Rhizobium Sp. Inoculation on N2-Fixing and Photosynthetic Activities of Two Cowpea [Vigna unguiculata (L.) Walp.] Genotypes · 1999

    Opposite direction

  6. negative
    S. Typhimurium inoculation on seeds before sowing had a more pronounced effect (loss in germination and defective sprouts) than sowing seeds in S. Typhimurium-inoculated soil (P < 0.01).

    INTERACTIONS BETWEEN SALMONELLA ENTERICA SUBSPECIES ENTERICA SEROVAR TYPHIMURIUM AND COWPEA (VIGNA UNGUICULATA VARIETY SINENSIS) SEEDS, PLANTS AND PERSISTENCE IN HAY · 2007 · compared with sowing seeds in S. Typhimurium

    Opposite direction

  7. no effect
    Percent germination of cultivars IT98K-205-M8, IT90K-277-2 and IT07K-222-2 inoculated with BICMV + CPMoV was not much affected.

    Germination and Longevity of Some Cowpea Cultivars Affected by Single and Mixed Virus Infections in Niger State, Nigeria · 2019

    Opposite direction

  8. no effect
    Rhizobia inoculation was ineffective for cowpea biomass.

    Rock biofertilizer and earthworm compound enriched in N with diazotrophic bacteria and micorhyzal fungi provide nutrients for plants. · 2012 · compared with without AMF and rhizobia inoculation

    Opposite direction

93 papers more in this group

See all 102 papers →

3 of 4 groups shown: named compounds and organisms first, then groups whose results differ (checked claim by claim), then those with positive and negative results, then the smaller groups.

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.