Intervention effectmodel-written summary

Annual application of 1200 g N /tree in three batches gave the best yield.

A claim from effect of soil nitrogen fertilizer on fruit set, the yield and fruit quality of Valencia orang trees. · 2022

Intervention effectobservedoriginal resultpositivemeasured

Claim · model-written summary

Annual application of 1200 g N /tree in three batches gave the best yield.

Taxon
Valencia orange treesCitrus sinensise1
Treatment
1200 g N /tree annually at three equal batchese0
Outcome
yielde0
Direction
beste0
Setting
Mallawy districte1

Not reportedMaterialGeneCompoundOrgan / stageInteractorInteractor roleSecond interactorSecond interactor roleComparatorValueQualifier

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

Citrus sinensis
Citrus sinensis · TaxonEllen Levy Finch ( Elf ) · CC BY-SA 3.0 · Wikimedia Commons ↗

Verbatim

e0

“The best results concerning yield and fruit quality were presented by adding 1200 g N /tree annually at three equal batches”

✓ located verbatim in the source · abstract, characters 780–903
e1

“Valencia orange trees cultivated on clay soil located at Mallawy district”

✓ located verbatim in the source · abstract, characters 74–147

Title

effect of soil nitrogen fertilizer on fruit set, the yield and fruit quality of Valencia orang trees.

Sahar Abdelrahman; Abd El-Hameed Wassel; Faroukh Abdelaziz Minia Journal of Agricultural Research and Development 2022. doi:10.21608/mjard.2022.124410.1005

Other claims from this paper (4)

Record rev-ca54fa14291fd5282c74d7525be3b10f84b44b2c88cbf598b651ae1932f3861b · schema claims-v0.9 · position 4 in the model’s answer

nitrogen · yield · Citrus sinensis (sweet orange)Results differ

48 papers: 39 positive, 9 negative or no effect

38 papers in the same direction as this claim · 8 in the opposite direction · 1 reporting no difference from an alternative

  1. negative
    Soil urea reduced fruit size.

    Aggregate Effects of Nutrients and Gibberellic Acid on ‘Valencia’ Orange Crop Value1 · 1973

    Opposite direction

  2. no effect
    Urea did not alter the ringing effect on orange yield.

    Effects of Ringing on Yields of Low-Bearing Orange Trees(Citrus Sinensis(L.) Osbeck) · 1971

    Opposite direction

  3. negative
    N application significantly decreased fruit weight and diameter of sweet orange.

    Effect of N and Zn on ^|^lsquo;Hamlin^|^rsquo; sweet orange (Citrus sinensis Osbeck) · 1981

    Opposite direction

  4. no effect
    Increased nitrogen did not reduce salinity harm to fruit production.

    Quantum efficiency of photosystem II and production of orange under salt stress and nitrogen fertilization · 2016 · compared with 100 and 200% of recommendation

    Opposite direction

  5. negative
    When N and P were applied together without K, a severe antagonism resulted, with a large yield decrease.

    Nitrogen, phosphorus, potassium interactions on valencia orange yields · 1990

    Opposite direction

  6. negative
    A nitrogen level of 224 kg N ha−1 reduced fruit weight compared with other N levels.

    Comparative Response of Huanglongbing-Affected Sweet Orange Trees to Nitrogen and Zinc Fertilization under Microsprinkler Irrigation · 2020 · compared with other N levels

    Opposite direction

  7. no effect
    Urea treatment did not significantly change the average yield of sweet orange trees compared with control.

    Response of Sweet Orange (Citrus Sinensis Osbeck.) Plants To Zinc, Urea and Dbcp. · 1974 · compared with control

    Opposite direction

  8. negative
    Orange under foliar urea produced significantly less fruit than soil nitrogen in one of three years.

    Yield of Citrus Trees with Foliar Urea as the Only N Source · 2006 · compared with soil N treatment

    Opposite direction

39 papers more in this group

See all 48 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.