Intervention effectmodel-written summary

Subsurface drip irrigation with 90 kg N/ha produced higher yield and yield components.

A claim from Effect of Irrigation Methods and Nitrogen Application Rates on Yield and Yield Components of Onion (Allium Cepa L.) Grown under Russian Environmental Conditions · 2019

Intervention effectobservedoriginal resultpositivemeasured

Claim · model-written summary

Subsurface drip irrigation with 90 kg N/ha produced higher yield and yield components.

Taxon
onionAllium cepat0
Treatment
subsurface drip irrigation with 90 kg N/hae0
Outcome
yield and yield componentse0
Direction
highere0

Not reportedMaterialGeneCompoundOrgan / stageInteractorInteractor roleSecond interactorSecond interactor roleComparatorSettingValueQualifier

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

“surface drip irrigation or subsurface drip irrigation with 90 kg N/ha resulted in higher yield and yield components.”

✓ located verbatim in the source · abstract, characters 912–1028
t0

“Onion (Allium Cepa L.)”

✓ located verbatim in the source · title, characters 93–115

Title

Effect of Irrigation Methods and Nitrogen Application Rates on Yield and Yield Components of Onion (Allium Cepa L.) Grown under Russian Environmental Conditions

Ashraf E. Elnamas Alexandria Science Exchange Journal 2019. doi:10.21608/asejaiqjsae.2019.53810

Other claims from this paper (8)

Record rev-73e2fc2bc46e480bb672a26f55e5761d3425f86f100b44d8473955be948c1df3 · schema claims-v0.9 · position 2 in the model’s answer

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

133 papers: 106 positive, 27 negative or no effect

105 papers in the same direction as this claim · 22 in the opposite direction · 5 reporting no difference from an alternative

  1. no effect
    Total onion yield was not improved by applying more water than the calculated irrigation requirement.

    Onion Irrigation and Nitrogen Leaching in the Arkansas Valley of Colorado 1990-1991 · 1993 · compared with the calculated irrigation requirement

    No difference from an alternativeCited by this paper

  2. negative
    High salinity irrigation decreased the number of leaves and mean bulb diameter of onion.

    Role of Foliar Application of Nicotinic Acid and Tryptophan on Onion Plants Response to Salinity Stress · 2014

    Opposite direction

  3. negative
    Deficit irrigation tended to reduce bulb number and bulb size.

    Crop Coefficient-based Deficit Irrigation and Planting Density for Onion: Growth, Yield, and Bulb Quality · 2012

    Opposite direction

  4. negative
    RDI with 50% of the IWR during bulb ripening slightly decreased onion yield by 9% compared with full irrigation.

    Regulated Deficit Irrigation as a Water-Saving Strategy for Onion Cultivation in Mediterranean Conditions · 2019 · compared with full irrigation

    Opposite direction

  5. negative
    Irrigating onion at 75% of requirements reduced yield by 10.3% relative to full irrigation.

    Effect of Deficit Irrigation on the Productive Response of Drip-irrigated Onion (Allium cepa L.) in Mediterranean Conditions · 2019 · compared with full irrigation

    Opposite direction

  6. negative
    An 11 day irrigation interval decreased onion bulb diameter and dry mass.

    Effects of Mycorrhizal Colonization on Growth Parameters of Onion under Different Irrigation and Soil Conditions · 2007

    Opposite direction

  7. no effect
    Time when irrigation was withheld did not affect onion growth and bulb yield.

    Fertilizer Type, But Not Time of Cessation of Irrigation, Affect Onion Development and Yield in a Semi-Arid Region · 2003

    Opposite direction

  8. no effect
    Yield under T2 was not statistically different from full irrigation.

    Evaluating the Effects of Deficit Irrigation on Yield and Water Productivity of Furrow Irrigated Onion (Allium cepa L.) in Ambo, Western Ethiopia · 2018 · compared with full irrigated treatment

    Opposite direction

124 papers more in this group

See all 133 papers →

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

184 papers: 157 positive, 27 negative or no effect

156 papers in the same direction as this claim · 23 in the opposite direction · 4 reporting no difference from an alternative

  1. negative
    High combined nitrogen and sulphur rates had an antagonistic effect on bulb nutrient uptake, yield components and yield.

    Nutrient uptake and yield of onion as influenced by nitrogen and sulphur fertilization · 2008

    Opposite directionCited by this paper

  2. positive
    Nitrogen at 160 kg ha−1 maximized total yield.

    PRODUCTION AND YIELD OF ONION UNDER DIFFERENT WATER AND NUTRITION MANAGEMENTS · 2022

    Same directionCites this paper

  3. negative
    Total yield at the lowest nitrogen rate was lower than at higher rates.

    Bolting, Yield, and Bulb Decay of Sweet Onion as Affected by Nitrogen Fertilization · 2003 · compared with higher N rates

    Opposite direction

  4. negative
    Onion yield decreased by 95 Mg·ha -1 for each 25% increase in the proportion of urea in fertilizer blends.

    Nitrogen Use Efficiency and Onion Yield Increased with a Polymer-coated Nitrogen Source · 2002

    Opposite direction

  5. no effect
    Yields of cabbage, carrots and onions were generally unaffected by N rate, except in cabbage in 2000.

    Assessment of Chlorophyll and Nitrate Meters as Field Tissue Nitrogen Tests for Cabbage, Onions, and Carrots · 2004

    Opposite direction

  6. 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

  7. negative
    An N rate of 120 kg ha−1 led to a yield drop in onion.

    Onion (Allium cepa L.) Yield and Growth Dynamics Response to In-Season Patterns of Nitrogen and Sulfur Uptake · 2020

    Opposite direction

  8. 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

175 papers more in this group

See all 184 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.