Intervention effectmodel-written summary

Combined nitrogen and phosphorus increased maize yield.

A claim from Nitrogen and phosphorus fertilizer sources and placement methods in maize (Zea mays L.) using labelled fertilizers · 1983

Intervention effectobservedoriginal resultpositivemeasured

Claim · model-written summary

Combined nitrogen and phosphorus increased maize yield.

Taxon
maizeZea mayst0
Treatment
nitrogen (various forms) and phosphoruse0
Outcome
crop yielde0
Direction
positive effecte0

Not reportedMaterialGeneCompoundOrgan / stageInteractorInteractor roleSecond interactorSecond interactor roleComparatorSettingValueQualifier

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

e0

“nitrogen (various forms) and phosphorus had a clear positive effect on crop yield”

✓ located verbatim in the source · abstract, characters 363–444
t0

“maize (Zea mays L.)”

✓ located verbatim in the source · title, characters 68–87

Title

Nitrogen and phosphorus fertilizer sources and placement methods in maize (Zea mays L.) using labelled fertilizers

E. P. Papanicolaou; V. D. Skarlou; C. Nobeli; et al. The Journal of Agricultural Science 1983. doi:10.1017/s0021859600038715

Other claims from this paper (12)

Record rev-e77a8dc9e115d669844a4a7eca43b659ca7069ec2616e67aca3d8500e0fece30 · schema claims-v0.9 · position 3 in the model’s answer

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

627 papers: 549 positive, 78 negative or no effect

548 papers in the same direction as this claim · 69 in the opposite direction · 9 reporting no difference from an alternative

  1. no effect
    Phosphorus alone had no significant effect on maize yield.

    Methods and time of application of labelled nitrogen and phosphorus fertilizers in maize (Zea mays L.) cultivation · 1985

    Opposite directionCites this paper

  2. no effect
    Phosphorus-based manure or compost application gave corn grain yields similar to N-based treatments.

    Phosphorus‐ and Nitrogen‐Based Manure and Compost Applications Corn Production and Soil Phosphorus · 1999 · compared with N‐based treatments

    Opposite direction

  3. no effect
    No effect of P fertilizer on maize yield was detected early in the trial.

    SUSTAINABLE MAIZE PRODUCTION USING GLIRICIDIA/MAIZE INTERCROPPING IN SOUTHERN MALAWI · 2006

    Opposite direction

  4. negative
    Lowest phosphorus supply significantly depressed maize shoot dry matter.

    Effect of Selected Mycorrhizal Inoculation on Phosphorus Sustainability in Sterile and Non‐sterile Soils in the Harran Plain in South Anatolia · 2003

    Opposite direction

  5. no effect
    plant ha-1 at harvest was not significantly affected by nitrogen and phosphorus levels.

    Effect of Different Levels of Nitrogen and Phosphorus on the Phenology and Yield of Maize Varieties · 2014

    Opposite direction

  6. no effect
    Phosphorus had no effect on dry matter yield.

    The Effect of Nitrogen and Phosphorus Fertilization on Growth, Yield and Quality of Forage Maize (Zea mays L.) · 2006

    Opposite direction

  7. no effect
    Maize yields did not increase where NP was applied.

    Trends of Yield and Soil Fertility in a Long-Term Wheat-Maize System · 2014

    Opposite direction

  8. 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

618 papers more in this group

See all 627 papers →

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

2,185 papers: 1,906 positive, 279 negative or no effect

1,905 papers in the same direction as this claim · 234 in the opposite direction · 45 reporting no difference from an alternative

  1. no effect
    The 150 kg N/ha rate gave no higher grain yield than the 50 kg N/ha rate

    Fate of Tagged Nitrogen Fertilizer Applied to Irrigated Corn · 1980 · compared with 50 kg N/ha rate

    No difference from an alternativeCited by this paper

  2. positive
    Nitrogen alone or with phosphorus increased maize yield and nitrogen content.

    Methods and time of application of labelled nitrogen and phosphorus fertilizers in maize (Zea mays L.) cultivation · 1985

    Same directionCites this paper

  3. negative
    Low nitrogen decreased maize grain yield.

    Within-Leaf Nitrogen Allocation in Adaptation to Low Nitrogen Supply in Maize during Grain-Filling Stage · 2016

    Opposite direction

  4. no effect
    Nitrogen timing did not affect corn production in the other two years.

    Corn Production as Affected by Nitrogen Application Timing and Tillage · 2004

    Opposite direction

  5. negative
    For the two years after 1992, losses were significantly higher for 134 kg N ha−1 on the clay loam.

    Nitrate Leaching and Nitrogen Budget as Affected by Maize Nitrogen Rate and Soil Type · 2000

    Opposite direction

  6. negative
    Nitrogen stress reduced kernel number of maize in field conditions.

    Nitrogen Deficiency in Maize: II. Carbon‐Nitrogen Interaction Effects on Kernel Number and Grain Yield · 1995

    Opposite direction

  7. no effect
    At high N rates, yields under the two tillage systems were approximately equal.

    Soil Nitrogen Availability after Long‐term Continuous No‐tillage and Conventional Tillage Corn Production · 1986

    Opposite direction

  8. negative
    Pretreatment with inhibitors of NOS and nitrate reductase blocked the water stress-induced increase in NO production in maize.

    Nitric Oxide Reduces Hydrogen Peroxide Accumulation Involved in Water Stress‐induced Subcellular Anti‐oxidant Defense in Maize Plants · 2008

    Opposite direction

2,176 papers more in this group

See all 2,185 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.