Intervention effectmodel-written summary

The combined foliar spray produced the highest grain yield.

A claim from Foliar Applied Potassium and Zinc Enhances Growth and Yield Performance of Maize under Rainfed Conditions · 2016

Intervention effectobservedoriginal resultpositivemeasured

Claim · model-written summary

The combined foliar spray produced the highest grain yield.

Taxon
MaizeZea mayst0
Treatment
combined foliar spray of potassium and zinc (FKS + FZS)e0
Outcome
grain yielde0
Direction
higheste0
Comparator
FKS + RRZn and RRK+ FZSe0

Not reportedMaterialGeneCompoundOrgan / stageInteractorInteractor roleSecond interactorSecond interactor roleSettingValueQualifier

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

Zea mays
Zea mays · TaxonAkwugo · CC BY-SA 4.0 · Wikimedia Commons ↗

Verbatim

t0

“Maize”

✓ located verbatim in the source · title, characters 75–80
e0

“The highest 1000 grain weight (g) and grain yield (kg ha -1 ) were recorded under the combined foliar spray of potassium and zinc (FKS + FZS), followed by FKS + RRZn and RRK+ FZS”

✓ located verbatim in the source · abstract, characters 848–1026

Title

Foliar Applied Potassium and Zinc Enhances Growth and Yield Performance of Maize under Rainfed Conditions

Muhammad Abbas Anees; Abid Ali; Usman Shakoor; et al. International Journal of Agriculture and Biology 2016. doi:10.17957/ijab/15.0204

Other claims from this paper (5)

Record rev-ff72caee532864085e4a47b0acec54a613d7b688a0d76869b11f63b8b7e346a5 · schema claims-v0.9 · position 4 in the model’s answer

zinc atom · yield · Zea mays (maize)Results differ

441 papers: 391 positive, 50 negative or no effect

390 papers in the same direction as this claim · 47 in the opposite direction · 3 reporting no difference from an alternative

  1. no effect
    Simultaneous Zn oxide and amino acid application at BBCH 14/15 had no effect on maize yield.

    Zinc and amino acids impact on nutrient status of maize during the 'critical window' · 2018

    Opposite directionCites this paper

  2. positive
    Zinc seed priming with P. aeruginosa increased grain yield by 39.6% under sufficient irrigation.

    Enhancing maize yield, water use efficiency, and Zn content under drought stress by applying Zn-solubilizing bacteria · 2025 · compared with control

    Same directionCites this paper

  3. positive
    Combined manure and zinc yielded 2.93 cobs per plant.

    Effect of Organic Manure and Zinc on Growth, Yield Attributes and Economics of Maize · 2023

    Same directionCites this paper

  4. negative
    Adding Zn to the intermediate Fe level accentuated Fe deficiency and depressed corn yield.

    Nutrient Balance Involving Phosphorus, Iron, and Zinc · 1965 · compared with intermediate Fe level

    Opposite direction

  5. negative
    Corn yield at zero zinc and 3.0 mM phosphorus was significantly lower than at 1.0 mM phosphorus.

    Potential for Phosphorus Toxicity in Zinc‐Stressed Corn and Potato · 1981 · compared with 1.0 m M P

    Opposite direction

  6. no effect
    Most foliar Zn applications had no grain-yield effect.

    Effect of Foliar Micronutrients (B, Mn, Fe, Zn) on Maize Grain Yield, Micronutrient Recovery, Uptake, and Partitioning · 2021

    Opposite direction

  7. negative
    In a pot experiment the highest Zn rate (250 ppm) slightly reduced corn yield.

    EFFECTS OF SOIL PROPERTIES AND AMENDMENTS ON THE AVAILABILITY OF ZINC IN SOILS · 1974

    Opposite direction

  8. negative
    Zn alone or P alone reduced aboveground dry matter and yield at harvest by 8-85% in LCV and FER soils relative to unfertilized plants

    Combining P and Zn fertilization to enhance yield and grain quality in maize grown on Mediterranean soils · 2021 · compared with unfertilized (control) plants

    Opposite direction

432 papers more in this group

See all 441 papers →

potassium · yield · Zea mays (maize)Positive and negative results

320 papers: 291 positive, 29 negative or no effect

290 papers in the same direction as this claim · 28 in the opposite direction · 1 reporting no difference from an alternative

  1. positive
    Foliar spray of 3% potassium was more efficient than soil application and fertilization of potassium fertilizer for increasing maize growth and yield.

    FOLIAR SPRAY SURPASSES SOIL APPLICATION OF POTASSIUM FOR MAIZE PRODUCTION UNDER RAINFED CONDITIONS · 2015 · compared with soil application and fertilization of potassiumfertilizer

    Same directionCited by this paper

  2. no effect
    Yield was not increased by K application.

    Maize Response to Fertilizer and Nitrogen Use Efficiency in Uganda · 2012

    Opposite direction

  3. negative
    Annual blanket N, P and K rates did not produce optimum maize yield under intensive land use.

    Response of maize to nitrogen, phosphorus, and potassium fertilizers in the savanna zones of Nigeria · 1995

    Opposite direction

  4. no effect
    Grain yield seldom responded to P and K fertilization.

    Over‐Fertilization Does Not Build Soil Test Phosphorus and Potassium in Ohio · 2018

    Opposite direction

  5. no effect
    Nano-N with 75% conventional N gave wheat and maize grain yield at par with full conventional fertilizer.

    Changes in microbial community structure and yield responses with the use of nano-fertilizers of nitrogen and zinc in wheat–maize system · 2024 · compared with N 100 PK

    Opposite direction

  6. no effect
    Potassium application did not significantly increase corn yield.

    The Relationships among Corn Yields, Leaf Composition and Fertilizers Applied · 1954

    Opposite direction

  7. negative
    Corn yield tended to be lower, by an average of 18.2%, with high K and no B than with low K and no B in 1982 and 1984.

    Potassium, Boron, Nitrogen, and Lime Effects on Corn Yield and Earleaf Nutrient Concentrations1 · 1987 · compared with low K was added with no B

    Opposite direction

  8. no effect
    Potash did not significantly affect corn yield on Tracy soil.

    Magnesium Deficiency and Corn Yield on Two Acid Indiana Soils · 1958

    Opposite direction

311 papers more in this group

See all 320 papers →

application · yield · Zea mays (maize)Positive and negative results

629 papers: 575 positive, 54 negative or no effect

574 papers in the same direction as this claim · 42 in the opposite direction · 12 reporting no difference from an alternative

  1. positive
    Foliar spray of 3% potassium was more efficient than soil application and fertilization of potassium fertilizer for increasing maize growth and yield.

    FOLIAR SPRAY SURPASSES SOIL APPLICATION OF POTASSIUM FOR MAIZE PRODUCTION UNDER RAINFED CONDITIONS · 2015 · compared with soil application and fertilization of potassiumfertilizer

    Same directionCited by this paper

  2. positive
    Foliar spray of 2 and 5% K significantly increased leaf K concentration, grains per cob and grain yield of drought-stressed maize.

    Foliar Application of Potassium Sulfate Partially Alleviates Pre-anthesis Drought-induced Kernel Abortion in Maize · 2017

    Same directionCites this paper

  3. positive
    Soil plus double foliar ZnSO4 fertilization increased fresh fodder yield of maize by 25% relative to control.

    Biofortification of maize fodder with zinc improves forage productivity and nutritive value for livestock · 2021 · compared with control

    Same directionCites this paper

  4. positive
    Zinc priming or foliar application with Pseudomonas increased corn cobs per square meter by 12.5%.

    Enhancing maize yield, water use efficiency, and Zn content under drought stress by applying Zn-solubilizing bacteria · 2025

    Same directionCites this paper

  5. no effect
    Foliar fungicides did not significantly improve yield in damaged or nondamaged plots.

    Effect of Foliar Fungicides on Corn with Simulated Hail Damage · 2009 · compared with nontreated controls

    Opposite direction

  6. no effect
    More than three spray applications generally gave no further yield gain.

    Maize Yield Response to Chemical Control of Spodoptera frugiperda at Different Plant Growth Stages in South Africa · 2021

    Opposite direction

  7. negative
    Foliar fertilizer applied from 2 weeks after silking reduced corn grain yield by 6.4% in 1977.

    Corn Grain Yield and Nutrient Response to Foliar Fertilizer Applied during Grain Fill1 · 1982

    Opposite direction

  8. negative
    Corn yield reduction was 1.5 times greater with proportional volume at the 12.5% rate.

    Effect of Carrier Volume on Corn (Zea mays) and Soybean (Glycine max) Response to Simulated Drift of Glyphosate and Glufosinate1 · 2002 · compared with constant spray volume

    Opposite direction

620 papers more in this group

See all 629 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.