Intervention effectmodel-written summary

D2 plus 5 kg ha-1 humic acid gave the highest seed yield.

A claim from Impact of Plant Density and Humic Acid Application on Yield, Yield Components and Nutrient Uptakes of Sunflower (Helianthus annuus L.) Grown in a Newly Reclaimed Soil · 2017

Intervention effectobservedoriginal resultpositivemeasured

Claim · model-written summary

D2 plus 5 kg ha-1 humic acid gave the highest seed yield.

Taxon
sunflowerHelianthus annuuse0
Treatment
plant density was 71.428 plant ha-1 (D2) and treated with 5 kg ha-1 of humic acide0
Outcome
seed yielde0
Direction
higheste0

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

e0

“The highest sunflower seed yield was obtained when plant density was 71.428 plant ha-1 (D2) and treated with 5 kg ha-1 of humic acid as a soil application.”

✓ located verbatim in the source · abstract, characters 1234–1389

Title

Impact of Plant Density and Humic Acid Application on Yield, Yield Components and Nutrient Uptakes of Sunflower (Helianthus annuus L.) Grown in a Newly Reclaimed Soil

S. Emam; A. Awad Journal of Soil Sciences and Agricultural Engineering /Journal of Soil Sciences and Agricultural Engineering 2017. doi:10.21608/jssae.2017.38094

Other claims from this paper (9)

Record rev-bcd5946dd7eb282ca5e3c742beae018c8a343bae835291b5e0b63b5fe1e38717 · schema claims-v0.9 · position 10 in the model’s answer

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

24 papers: 22 positive, 2 negative or no effect

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

  1. positive
    Humic acid foliar spray gave the highest number of seeds per disc (1752.3) in sunflower in a field trial at Ramadi.

    Effect of Activating of Salicylic Acid and Foliar Application with Humic Acid on Some Growth and Yield Characteristics of Sunflower (Helianthus annuus L.) · 2021

    Same directionCites this paper

  2. negative
    Treated zeolite reduced sunflower yield by more than 60%.

    Effect of treated zeolite, iron waste, and liming on phytoavailability of Zn, Cu, and Ni in long-term biosolids-amended soils · 2008

    Opposite direction

  3. negative
    Humic acid led to lower sunflower seed yield of 2607−3686 kg ha−1.

    Effects of Environmentally Friendly Materials on Saline Soil Improvement and Sunflower Yields in the Hetao Irrigation Region, China · 2024

    Opposite direction

  4. positive
    At harvest, seaweed extract increased plant height, head diameter and seed index.

    EFFECT OF SEAWEED EXTRACTS AS FOLIAR SPRAY ON SUNFLOWER YIELD AND OIL CONTENT · 2011 · compared with control

    Same direction

  5. positive
    Soaking sunflower seed in 5% C. racemosa extract for 8 h gave the lowest abnormal seedling production (3%).

    Comparative efficacy of brown, red and green seaweed extracts on low vigour sunflower (Helianthus annus L.) var. TN (SUF) 7 seeds · 2015

    Same direction

  6. positive
    RDF with hydrogel at 2.5 kg/ha gave higher head diameter (12.93 cm) in sunflower.

    Growth, Yield and Quality of Rabi Sunflower as Influenced by Moisture Absorbents, Organic and Inorganic Fertilizers · 2018

    Same direction

  7. positive
    Soil amendments increased sunflower yield and oil contents.

    Effect of some Soil Amendments on Damping-Off and Charcoal-Rot as well as on Sunflower Growth Characteristics and Yield · 2012

    Same direction

  8. positive
    Humic acid application improved most growth, physiological parameters, yield and yield components compared with control.

    Effect of Humic Acid Application on Growth and Productivity of Sunflower Under Saline Soil Conditions · 2020 · compared with control

    Same direction

15 papers more in this group

See all 24 papers →

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

85 papers: 70 positive, 15 negative or no effect

69 papers in the same direction as this claim · 15 in the opposite direction

  1. negative
    Increasing plant density decreased seed yield per plant of sunflower

    Response of two sunflower hybrids to planting dates and densities · 2003

    Opposite directionCited by this paper

  2. negative
    The zero NP treatment on 60 cm beds gave minimum grain yield.

    Impact of Varying Planting Patterns and Fertilizer Application Strategies on Autumn Planted Sunflower Hybrid · 2013

    Opposite directionCited by this paper

  3. positive
    The maximum yield of sunflower was produced in east-west rows at four to eight plants m- 2 and 75 to 100 cm row spacing.

    Yield and quality of sunflower as affected by row orientation, row spacing and plant density · 2001

    Same directionCited by this paper

  4. positive
    At 75 cm row spacing, sunflower achene yield reached the maximum of 2.97 t ha -1.

    YIELD AND OIL CONTENT OF SUNFLOWER ( HELIANTHUS ANNUUS L.) AS INFLUENCED BY SPACING AND REDUCED IRRIGATION CONDITION · 2012

    Same directionCited by this paper

  5. positive
    Increasing row spacing increased yield.

    Influence of plant spacing and sowing time on yield of sunflower (Helianthus annus L.) · 2014

    Same directionCited by this paper

  6. positive
    Sowing density of 60x30 cm with single seedling and 100% RDF increased head diameter, seeds per head and head weight.

    Effect of Sowing Density on the Growth, Yield and Nutrient Uptake of Hybrid Sunflower (Helianthus annuus L.) in Rabi Season · 2017

    Same directionCited by this paper

  7. positive
    Plant density of 20000 plants/fed gave the highest seed yield, 2669.14 and 2569.59 kg/fed. in the two seasons.

    Effect of Plant Density and Nitrogen Fertilizer Splitting on the Production of Sunflower · 2020

    Same directionCites this paper

  8. no effect
    Increasing row spacing did not increase sunflower yield on a sandy soil.

    Response of Sunflower to Plant Population1 · 1980

    Opposite direction

76 papers more in this group

See all 85 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.