Intervention effectmodel-written summary

Heading nitrogen in deficient wheat yielded grain protein above 14%.

A claim from Predicting Late Season Nitrogen Fertilizer Requirements of Irrigated Durum Wheat Using Stem Nitrate Analyses · 1990

Intervention effectobservedoriginal resultpositivemeasured

Claim · model-written summary

Heading nitrogen in deficient wheat yielded grain protein above 14%.

Treatment
60 lbs. N/a at headinge0
Outcome
grain protein levelse0
Direction
abovee0
Value
14%e0

Not reportedMaterialGeneCompoundOrgan / stageInteractorInteractor roleSecond interactorSecond interactor roleComparatorSettingQualifier

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

Triticum aestivum
Triticum aestivum · TaxonRasbak · CC BY-SA 3.0 · Wikimedia Commons ↗

Verbatim

e0

“The application of 60 lbs. N/a at heading to N-deficient wheat and 15 lbs. N/a to N-sufficient wheat resulted in grain protein levels above 14% but had little effect on grain yield”

✓ located verbatim in the source · abstract, characters 653–833

Title

Predicting Late Season Nitrogen Fertilizer Requirements of Irrigated Durum Wheat Using Stem Nitrate Analyses

Thomas A. Doerge; Mike Ottman UA Campus Repository (The University of Arizona) 1990

Other claims from this paper (8)

Record rev-e2e98b78c0df7072baf4098e4c3f7faa75d1973e7857a173fd7a49555fb97de2 · schema claims-v0.9 · position 4 in the model’s answer

nitrogen · molecular: expression · Triticum aestivum (wheat)Positive and negative results

37 papers: 26 positive, 11 negative or no effect

25 papers in the same direction as this claim · 11 in the opposite direction

  1. negative
    Heading nitrogen raised grain protein above 14% in deficient and sufficient wheat.

    Effects of Early Season Nitrogen Rates on Stem Nitrate Levels and Nitrogen Fertilizer Requirements During Grain Filling for Irrigated Durum Wheat · 1989

    Opposite directionCited by this paperAbout lacking this nutrient, so it counts the other way round

  2. positive
    Late nitrogen increased grain protein from 15.2 to 17.4% after excessive early nitrogen.

    Improved Late Season Nitrogen Fertilizer Management with Irrigated Durum Wheat Using Stem Nitrate Analyses · 1991

    Same directionCites this paper

  3. no effect
    Purified urea-soluble nonhistone proteins did not affect transcription of native wheat DNA.

    Involvement of Nonhistone Chromosomal Proteins in Transcriptional Activity of Chromatin during Wheat Germination · 1979

    Opposite direction

  4. no effect
    N application did not increase GS gene transcript abundance in wheat.

    Genetic Diversity in Nitrogen Fertiliser Responses and N Gas Emission in Modern Wheat · 2022

    Opposite direction

  5. no effect
    Anhydrous ammonia at 105 kg N ha −1 caused no crop damage in final yield.

    Use of Anhydrous Ammonia in Single‐Pass Seeding Operations of Spring Wheat at Varied Landscape Positions · 1999

    Opposite direction

  6. negative
    Nitrogen starvation significantly upregulated TaNRT2.1-2.6.

    The Functional Diversity of the High-Affinity Nitrate Transporter Gene Family in Hexaploid Wheat: Insights from Distinct Expression Profiles · 2023

    Opposite directionAbout lacking this nutrient, so it counts the other way round

  7. negative
    TaGS1.2 expression increased under nitrogen-deficient conditions.

    Single-cell nuclear transcriptomics reveal root tip adaptations to nitrogen scarcity in wheat · 2025

    Opposite directionAbout lacking this nutrient, so it counts the other way round

  8. no effect
    Nitrogen concentration did not affect the composition or expression order of HMW-GS in wheat.

    Effect of Different Nitrogen Concentration on Expression Trend and Content of HMW-GS in Wheat Kernel · 2007

    Opposite direction

28 papers more in this group

See all 37 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.