Intervention effectmodel-written summary

Phosphorus at 90 kg ha-1 gave the highest seed length (0.70 cm)

A claim from Growth and Yield of Cowpea as Influenced by Different Phosphorus Levels · 2021

Intervention effectobservedoriginal resultpositivemeasured

Claim · model-written summary

Taxon: CowpeaVigna unguiculatat0
Treatment: Application of phosphorus at 90 kg ha-1e2
Outcome: seed lengthe2
Direction: higheste2
Value: 0.70 cme2

Not reportedMaterialGeneCompoundOrgan / stageInteractorInteractor roleSecond interactorSecond interactor roleComparatorSettingQualifier

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

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

Verbatim

t0
“Growth and Yield of Cowpea as Influenced by Different Phosphorus Levels”
✓ located verbatim in the source · title, characters 0–71

e2
“Application of phosphorus at 90 kg ha-1 showed the highest leaf area index (6.67), SPAD value (50.98), pod length (14.33 cm), seed length (0.70 cm), seed breadth (0.50 cm) and grain yield (0.34 t ha-1)”
✓ located verbatim in the source · abstract, characters 955–1156

Title

Growth and Yield of Cowpea as Influenced by Different Phosphorus Levels

FB Putul; AR Khan; MS Hossain; et al. Bangladesh Agronomy Journal 2021. doi:10.3329/baj.v24i1.55543

Other claims from this paper (17)

Association BARI Felon-1 required a minimum of 96 days to first flowering
Association BARI Felon-1 required a minimum of 108 days to 50% flowering
Association BARI Felon-1 had the highest absolute growth rate (0.71 g day-1)
Association BARI Felon-1 had the highest crop growth rate (23.69 g m-2 day-1)
Association BARI Felon-1 had the highest relative growth rate (0.047 g g-1 day-1)
Association BARI Felon-1 had the highest net assimilation rate (1.40 g m-2 day-1)
Association BARI Felon-1 had the highest leaf area index (6.68)
Association BARI Felon-1 had the highest SPAD value (51.03)
Association BARI Felon-1 had the highest seed length (0.71 cm)
Association BARI Felon-1 had the highest seed breadth (0.54 cm)
Association Genotype A-06008 gave the highest grain yield (0.62 t ha-1)
Intervention effect Phosphorus at 90 kg ha-1 gave the highest leaf area index (6.67)
Intervention effect Phosphorus at 90 kg ha-1 gave the highest SPAD value (50.98)
Intervention effect Phosphorus at 90 kg ha-1 gave the highest pod length (14.33 cm)
Intervention effect Phosphorus at 90 kg ha-1 gave the highest seed breadth (0.50 cm)
Intervention effect Phosphorus at 90 kg ha-1 gave the highest grain yield (0.34 t ha-1)
Association Genotype A-06008 showed the best performance at 90 kg ha-1 phosphorus

Record rev-e463525b641417f0db0ec26ed1f3cfb7643a99c50049d6314da7f05bc18deb49 · schema claims-v0.9 · position 15 in the model’s answer

phosphorus · yield · Vigna unguiculata (cowpea)Results differ

113 papers: 107 positive, 6 negative or no effect

106 papers in the same direction as this claim · 5 in the opposite direction · 1 reporting no difference from an alternative

positive
Applied phosphorus significantly improved pods per plant in cowpea, with the highest response at 60 kg.P.ha–1.
Influence of phosphorus on the performance of cowpea (Vigna unguiculata (L) Walp.) varieties in the Sudan savanna of Nigeria · 2011
Same directionCited by this paper
no effect
Potassium and phosphorus rates showed no interaction effect on grain yield.
Liming, fertilization, and rhizobia inoculation on cowpea yield in a Brazilian Amazon upland forest environment · 2021
Opposite direction
no effect
Phosphorus level had no significant effect on stem girth, plant height or 100 seed weight.
Effect of different phosphorus levels on four cowpea (Vigna unguiculata Walp L.) varieties for grain and fodder yield in Upper East Region of Ghana · 2019
Opposite direction
negative
Cowpea yield with P was 0.01 Mg/ha, against 0.13 Mg/ha without P, as written.
Crop Response to Lime and Phosphorus on New Bench Terraces in the Tropics · 1990 · compared with no‐P
Opposite direction
no effect
Phosphorus fertilizer and row spacing did not significantly influence grain number per pod.
Responses of Cowpea to Phosphorous Application Rates and Row Spacing in the Sudan Savanna Zone of Nigeria · 2020
Opposite direction
no effect
Phosphorus application had no significant effect on crop yield.
Effect of density of acacia and phosphorus fertilization on yield and water expense efficiency of rainfed cowpea in arid environment · 2005
Opposite direction
no effect
Calcined Burkina phosphate rock (CPR) showed no superiority over non-calcined Burkina phosphate rock (BPR) for grain production.
Effect of calcined/non-calcined phosphate rock application on crop yield and phosphorus availability to replace commercial fertilizer on a lixisol in Burkina Faso · 2025 · compared with BPR
No difference from an alternative
positive
Phosphorus alone consistently increased cowpea grain yield across locations.
Growth and Yield Responses of Cowpea to Inoculation and Phosphorus Fertilization in Different Environments · 2017
Same direction

104 papers more in this group

See all 113 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.

Other papers on the same question

phosphorus · yield · Vigna unguiculata (cowpea)Results differ