Intervention effectmodel-written summary

Nitrogen at 125 kg/ha improved bulb diameter, bulb weight and yield.

A claim from Effect of nitrogen and phosphorus on growth and bulb yield of kharif onion (Allium cepa L.) crop raised through sets in the lower hills of Himachal Pradesh · 2010

Intervention effectobservedoriginal resultpositivemeasured

Claim · model-written summary

Nitrogen at 125 kg/ha improved bulb diameter, bulb weight and yield.

Taxon
kharif onion (Allium cepa L.)Allium cepat0
Treatment
nitrogen application at 125 kg/hae0
Outcome
bulb diameter (polar), bulb weight and yield per hectaree0

Not reportedMaterialGeneCompoundOrgan / stageInteractorInteractor roleSecond interactorSecond interactor roleComparatorSettingDirectionValueQualifier

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

“A pronounced response of nitrogen application at 125 kg/ha was evident in respect of important yield attributing parameters, i.e. bulb diameter (polar), bulb weight and yield per hectare”

✓ located verbatim in the source · abstract, characters 477–663
t0

“kharif onion (Allium cepa L.)”

✓ located verbatim in the source · title, characters 62–91

Title

Effect of nitrogen and phosphorus on growth and bulb yield of kharif onion (Allium cepa L.) crop raised through sets in the lower hills of Himachal Pradesh

Arvind Sharma; Ranjana Bhatia; Rajni Raina Progressive Horticulture 2010

Other claims from this paper (6)

Record rev-904bf07eee792b16e252fafd6f0c13a1d53b51c1ccae2cd3167df04ad47866af · schema claims-v0.9 · position 5 in the model’s answer

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 direction

  2. 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

  3. 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

  4. 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

  5. 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

  6. 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

  7. 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

  8. no effect
    Nitrogen manuring had practically no effect on yield.

    STUDIES IN THE PHYSIOLOGY OF THE ONION PLANT · 1947

    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.