Intervention effectmodel-written summary

Full RDF with vermiwash gave higher onion manganese and copper uptake at harvest.

A claim from Impact of foliar application of vermiwash on growth, nutrient uptake and yield of onion · 2025

Intervention effectobservedoriginal resultpositivemeasured

Claim · model-written summary

Full RDF with vermiwash gave higher onion manganese and copper uptake at harvest.

Taxon
onionAllium cepae0
Treatment
100 per cent RDF with foliar spray of vermiwashe0
Outcome
manganese and copper uptakee0
Direction
highere0
Qualifier
at harveste0

Not reportedMaterialGeneCompoundOrgan / stageInteractorInteractor roleSecond interactorSecond interactor roleComparatorSettingValue

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

“application of 100 per cent RDF with foliar spray of vermiwash showed higher manganese and copper uptake by onion at harvest.”

✓ located verbatim in the source · abstract, characters 1614–1739

Title

Impact of foliar application of vermiwash on growth, nutrient uptake and yield of onion

A B Jadhav; V S Patil; A B Gosavi; et al. Journal of Eco-friendly Agriculture 2025. doi:10.48165/jefa.2025.20.2.8

Other claims from this paper (9)

Record rev-5c7d7a73cd8394d22984dfd50025b482a181350751d67ff8a677a63a9afbf09e · schema claims-v0.9 · position 10 in the model’s answer

application · nutrient: content · Allium cepa (onion)Positive and negative results

15 papers: 13 positive, 2 negative or no effect

12 papers in the same direction as this claim · 2 in the opposite direction

  1. no effect
    Foliar sprays other than ZnSO4 did not increase onion micronutrient concentrations.

    RESPONSE OF ONION TO FOLIAR APPLICATION OF SOME MICRONUTRIENTS · 1999

    Opposite direction

  2. no effect
    Foliar fertilization had very little effect on onion leaf nitrogen concentration.

    FOLIAR NITROGEN EFFECTS ON ONION PRODUCTION AND DAMAGE BY THRIPS AND PURPLE BLOTCH · 1990

    Opposite direction

  3. positive
    The highest onion bulb N, P and K values occurred with 150 units of K2O and 3g/l Stimufol.

    Vegetative Growth and Chemical Parameters of Onion as Influenced by Potassium as Major and Stimufol as Minor Fertilizers · 2011

    Same direction

  4. positive
    The combined treatment gave the highest onion bulb N, P, K, Cu, Fe and Zn.

    Response of Onion Yield and Its Chemical Content to NPK Fertilization and Foliar Application of Some Micronutrients · 2017

    Same direction

  5. positive
    Soil humic acid application positively affected P, Mg and Fe contents of bulbs.

    The Influence of Irrigation Water Salinity and Humic Acid on Nutrient Contents of Onion (Allium cepa L.) · 2020

    Same direction

  6. positive
    Soil N plus higher-level foliar spray (4.6 kg N/f) significantly increased N, P and K uptake of the onion plant 100 days after sowing.

    NITROGEN FERTILIZATION OF ONION IN SANDY SOILS · 1998

    Same direction

  7. positive
    Nanoencapsulated foliar nutrients improved nutrient penetration and mobilization more than free fertilizers.

    Combined Soil Microorganism Amendments and Foliar Micronutrient Nanofertilization Increased the Production of Allium cepa L. through Aquaporin Gene Regulation · 2023 · compared with free-form fertilizers

    Same direction

  8. positive
    Foliar selenium was more efficient than soil application for onion biofortification.

    Onion quality and yield after agronomic biofortification with selenium · 2024 · compared with soil application

    Same direction

6 papers more in this group

See all 15 papers →

fertilization · nutrient: content · Allium cepa (onion)Positive and negative results

90 papers: 81 positive, 9 negative or no effect

80 papers in the same direction as this claim · 9 in the opposite direction

  1. no effect
    Compost application showed no significant change in soil Pb, Cr and Mn.

    Effect of agro industrial wastes compost on soil health and onion yields improvements: study at field condition · 2019

    Opposite direction

  2. no effect
    Irrigation and fertilization had little effect on plant total N concentration.

    Effect of Drip Irrigation and Fertilization Timing and Rate on Yield of Onion · 2003

    Opposite direction

  3. negative
    Lettuce, onion and carrot seedlings in compost had lower potassium percentage than in sand.

    Growth and Mineral Composition of Vegetable Seedlings · 1964 · compared with sand culture

    Opposite direction

  4. negative
    Fertilizer systems increased bulb nitrate content.

    Influence of the fertiliser system on the soil nutrient regime and onion productivity · 2022

    Opposite direction

  5. no effect
    Farmyard manure had little effect on exchangeable soil calcium and magnesium.

    Soil potassium and the growth of vegetable seedlings. II.—Effect of potassium and ammonium salts on the growth and composition of seedlings · 1965

    Opposite direction

  6. no effect
    Different levels of nitrogen and vermicompost had no significant effect on total P and K contents in soil.

    Integrated effect of vermicompost and nitrogen fertilizers on soil nutrient status and yield of onion-radish cropping system · 2011

    Opposite direction

  7. no effect
    Foliar fertilization had very little effect on onion leaf nitrogen concentration.

    FOLIAR NITROGEN EFFECTS ON ONION PRODUCTION AND DAMAGE BY THRIPS AND PURPLE BLOTCH · 1990

    Opposite direction

  8. negative
    Excessive nitrogen and sulfur increased nitrate accumulation in onion.

    Effect of Nitrogen and Sulfur Fertilizer on Yield and Quality in Onion · 2008

    Opposite direction

81 papers more in this group

See all 90 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.