Intervention effectmodel-written summary

A potassium dose of 215 kg ha-1 of K2O provided maximum total onion yield.

A claim from AGRONOMIC AND QUALITATIVE PERFORMANCE OF DENSELY CULTIVATED ONION CULTIVARS AS AFFECTED BY POTASSIUM FERTILISATION · 2019

Intervention effectobservedoriginal resultpositivemeasured

Claim · model-written summary

A potassium dose of 215 kg ha-1 of K2O provided maximum total onion yield.

Taxon
onionAllium cepae1
Treatment
potassium dosese0
Outcome
total and commercial yieldse0
Direction
maximume0
Value
215e0

Not reportedMaterialGeneCompoundOrgan / stageInteractorInteractor roleSecond interactorSecond interactor roleComparatorSettingQualifier

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

Allium cepa
Allium cepa · TaxonMehdi · CC BY-SA 3.0 · Wikimedia Commons ↗

Verbatim

e0

“The potassium doses that provided maximum total and commercial yields were 215 and 216 kg ha-1 of K2O, respectively.”

✓ located verbatim in the source · abstract, characters 631–747
e1

“onion cultivars”

✓ located verbatim in the source · abstract, characters 263–278

Title

AGRONOMIC AND QUALITATIVE PERFORMANCE OF DENSELY CULTIVATED ONION CULTIVARS AS AFFECTED BY POTASSIUM FERTILISATION

Francisco das Chagas Gonçalves; Leilson Costa Grangeiro; Valdívia de Fátima Lima de Sousa; et al. Revista Caatinga 2019. doi:10.1590/1983-21252019v32n404rc

Other claims from this paper (5)

Record rev-2bc30c1b2eecdeab28e18beed82f0685e7ee082d257544e13a1e33d2f84c8cf9 · schema claims-v0.9 · position 1 in the model’s answer

potassium · yield · Allium cepa (onion)Positive and negative results

59 papers: 54 positive, 5 negative or no effect

53 papers in the same direction as this claim · 5 in the opposite direction

  1. positive
    All yield contributing characters of onion responded to applied potassium.

    Response of Onion to Applied Potassium at Farmer’s Scale Field · 2017

    Same directionCited by this paper

  2. negative
    N, P and K addition depressed onion yield in the first year.

    N–P–K FERTILIZER EFFECTS ON YIELD, COMPOSITION AND RESIDUES OF LETTUCE, CELERY, CARROT AND ONION GROWN ON AN ORGANIC SOIL IN QUEBEC · 1975

    Opposite direction

  3. no effect
    Higher fertilization did not increase onion yield beyond stated N, P and K levels.

    OPTIMAL SOIL pH AND SUFFICIENCY CONCENTRATIONS OF N, P AND K FOR MAXIMUM ALFALFA AND ONION YIELDS ON ACID ORGANIC SOILS · 1980

    Opposite direction

  4. no effect
    Potassium levels did not affect onion yield.

    Response of Rabi Onion cv. Nasik Red to nitrogen and Potassium Fertilizer · 2001

    Opposite direction

  5. no effect
    Up to 25% KCl caused no significant growth or yield decline under direct seeding.

    Onion Bulb Yield and Quality as Influenced by Seed or Seedling Planting Methods As well as Potassium Fertilizer Forms, K2SO4 and KCl, and Their Combination · 2023

    Opposite direction

  6. no effect
    Phosphorus, potash, and nutrient by spacing interactions had nonsignificant effects on yield.

    Influence of Nitrogen, Phosphorus, Potassium and Planting Distance on the Maturity and Yield of Onion (Allium Cepa L.). · 1974

    Opposite direction

  7. positive
    Raising potassium sulphate up to 150 kg/fed significantly affected total yield and its components (bulb weight and bulb dimension) of onion.

    RESPONSE OF GROWTH AND YIELD OF ONION PLANTS TO POTASSIUM FERTILIZER AND HUMIC ACID. · 2005

    Same direction

  8. positive
    Bulb yield of onion increased significantly up to 120 kg K2O/ha.

    Response of onion (Allium cepa) to potassium application · 2001

    Same direction

50 papers more in this group

See all 59 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.