Intervention effectmodel-written summary

Diameter of head, number and weight of seeds per head, and seed yield increased with increasing levels of N and P.

A claim from Effect of irrigation, N, and P on yield and yield attributes of spring sunflower (Helianthus annuus L.) · 2016

Intervention effectobservedoriginal resultpositivemeasured

Claim · model-written summary

Diameter of head, number and weight of seeds per head, and seed yield increased with increasing levels of N and P.

Taxon
Helianthus annuusHelianthus annuust0
Treatment
increasing levels of N and Pe4
Outcome
diameter of head, number and weight of seeds per head, and seed yielde4
Direction
increasede4

Not reportedMaterialGeneCompoundOrgan / stageInteractorInteractor roleSecond interactorSecond interactor roleComparatorSettingValueQualifier

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

Helianthus annuus
Helianthus annuus · TaxonJon Sullivan · Public domain · Wikimedia Commons ↗

Verbatim

t0

“Effect of irrigation, N, and P on yield and yield attributes of spring sunflower (Helianthus annuus L.)”

✓ located verbatim in the source · title, characters 0–103
e4

“The diameter of head, number and weight of seeds per head, and seed yield increased with increasing levels of N and P”

✓ located verbatim in the source · abstract, characters 967–1084

Title

Effect of irrigation, N, and P on yield and yield attributes of spring sunflower (Helianthus annuus L.)

H. P. S. Tomar; K. S. Dadhwal; Harjinder Singh Tropical Agriculture 2016

Other claims from this paper (10)

Record rev-d9e2d1c0442206280569ffe6dc101b60003f35f3b0fe63a5011db7beab6f7135 · schema claims-v0.9 · position 11 in the model’s answer

phosphorus · yield · Helianthus annuus (common sunflower)Results differ

81 papers: 79 positive, 2 negative or no effect

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

  1. positive
    Sunflower head diameter was maximum at 28.19 cm with 150-50 NP kg ha-1.

    INTEGRATED MANAGEMENT OF NP FERTILIZERS CAN BOOST THE GROWTH AND YIELD PERFORMANCE OF SUNFLOWER (HELIANTHUS ANNUS L.) · 2021

    Same directionCites this paper

  2. no effect
    P application did not influence sunflower seed yield.

    Sunflower Response to Nitrogen and Phosphorus in Wheat‐Fallow Cropping Systems · 1997

    Opposite direction

  3. no effect
    Phosphorus rate had no influence on sunflower yield.

    Sunflower Type Influences Yield Prediction using Active Optical Sensors · 2019

    Opposite direction

  4. positive
    PSB enhanced head diameter, seed weight, kernel ratio and oil content.

    Performance of phosphate solubilizing bacteria for improving growth and yield of sunflower (Helianthus annuus L.) in the presence of phosphorus fertilizer · 2010 · compared with no application

    Same direction

  5. positive
    Sunflower growth and yield responded strongly to increasing phosphorus supply.

    EFFECTS OF PHOSPHORUS SUPPLY ON GROWTH, YIELD, AND YIELD COMPONENTS OF SAFFLOWER AND SUNFLOWER · 2011

    Same direction

  6. positive
    The 120 kg N plus 75 kg P2O5 rate produced the maximum number of seeds per head.

    Response of Nitrogen and Phosphorus Fertilizer and Plant Spacing on Growth and Yield Contributing Character of Sunflower · 1970

    Same direction

  7. positive
    Increasing phosphorus above 75% of the recommended rate raised sunflower head diameter, seeds per head and thousand-seed weight in uninoculated plants.

    Effect Of Va-Mycorrhiza On Growth And Yield Of Sunflower (Helianthus Annuus L.) At Different Phosphorus Levels · 2010

    Same direction

  8. positive
    Sunflower grain yield showed a significant response to N and P up to 60 kg N and 30 kg P2O5 ha-1 in three years of field experiments.

    Effect of Fertilizer Nitrogen and Phosphorus on the Grain Yield, Nutrient Uptake and Oil Quality of Sunflower · 1997

    Same direction

72 papers more in this group

See all 81 papers →

nitrogen · yield · Helianthus annuus (common sunflower)Positive and negative results

196 papers: 182 positive, 14 negative or no effect

181 papers in the same direction as this claim · 10 in the opposite direction · 4 reporting no difference from an alternative

  1. positive
    The greatest achene yield occurred with 180 kg N ha−1.

    Response of sunflower hybrids to nitrogen application grown under different agro-environments · 2016

    Same directionCites this paper

  2. positive
    Sunflower head diameter was maximum at 28.19 cm with 150-50 NP kg ha-1.

    INTEGRATED MANAGEMENT OF NP FERTILIZERS CAN BOOST THE GROWTH AND YIELD PERFORMANCE OF SUNFLOWER (HELIANTHUS ANNUS L.) · 2021

    Same directionCites this paper

  3. negative
    The relative energy cost of one achene rose one to twenty-fourfold with greater density and lower nitrogen.

    Regulatory Mechanisms of Reproductive Effort in Plants 1. Plasticity in Reproductive Energy Allocation and Propagule Output of Helianthus annuus L. (Compositae) Cultivated at Varying Densities and Nitrogen Levels · 1986

    Opposite direction

  4. no effect
    N did not significantly affect yield at sites with higher chlorophyll readings.

    Sunflower Response to Nitrogen and Phosphorus in Wheat‐Fallow Cropping Systems · 1997

    Opposite direction

  5. negative
    The 60 kg N ha−1 dose alone yielded significantly less.

    Effect of Varying Nitrogen and Micronutrient Fertilization on Yield Quantity and Quality of Sunflower (Helianthus annuus L.) Achenes · 2022

    Opposite direction

  6. negative
    N rates of 180-210 kg ha−1 decreased sunflower seed yield by 2%-5%.

    Early sowing increases nitrogen use efficiency of sunflower in wet clay soils · 2023

    Opposite direction

  7. negative
    Glufosinate ammonium and ametryn herbicides reflected in losses of sunflower dry weight biomass and crop yield.

    Control of volunteer soybean plants in sunflower crop1 · 2015

    Opposite direction

  8. no effect
    Side-dressing with urea had no effect on sunflower yield.

    Potential for sunflower to use residual soil water in the dry season after maize in North-West Cambodia · 2014

    Opposite direction

187 papers more in this group

See all 196 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.