Intervention effectmodel-written summary

UAN reduced N2O-N emissions by 27% compared with urea in irrigated no-till corn.

A claim from Nitrogen Source Effects on Nitrous Oxide Emissions from Irrigated No‐Till Corn · 2010

Intervention effectobservedoriginal resultpositivemeasured

Claim · model-written summary

UAN reduced N2O-N emissions by 27% compared with urea in irrigated no-till corn.

Treatment
UANe3
Outcome
N2O-N emissionse3
Direction
reducede3
Value
27%e3
Qualifier
averaged over 2 yre3
Comparator
ureae3

Not reportedMaterialGeneCompoundOrgan / stageInteractorInteractor roleSecond interactorSecond interactor roleSetting

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

Zea mays subsp. mays
Zea mays subsp. mays · TaxonDominicus Johannes Bergsma · CC BY-SA 4.0 · Wikimedia Commons ↗

Verbatim

e1

“in an irrigated no-till (NT) corn (Zea mays L.) production system”

✓ located verbatim in the source · abstract, characters 391–456
e3

“Compared with urea, SuperU reduced N2O-N emissions 48%, ESN 34%, Duration III 31%, UAN 27%, and UAN+AgrotainPlus 53% averaged over 2 yr”

✓ located verbatim in the source · abstract, characters 994–1129

Title

Nitrogen Source Effects on Nitrous Oxide Emissions from Irrigated No‐Till Corn

Ardell D. Halvorson; Stephen J. Del Grosso; Francesco Alluvione Journal of Environmental Quality 2010. doi:10.2134/jeq2010.0041

Other claims from this paper (10)

Record rev-76e68a04a658adffa04252f1bf48a52e3d556fb04f3e073da1322faab6e382cd · schema claims-v0.9 · position 5 in the model’s answer

urea ammonium nitrate · environment: emissions · Zea mays (maize)Positive and negative results

7 papers: 5 positive, 2 negative or no effect

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

  1. positive
    UAN+AgrotainPlus had lower emissions than UAN.

    Nitrogen Source Effects on Soil Nitrous Oxide Emissions from Strip‐Till Corn · 2011 · compared with UAN

    Same directionCites this paper

  2. positive
    Injected UAN + nitrapyrin: emissions decreased.

    Enhanced‐Efficiency Fertilizer Impacts on Yield‐Scaled Nitrous Oxide Emissions in Maize · 2018

    Same directionCites this paper

  3. negative
    Pre-plant UAN with a urease inhibitor produced 59% greater N2O emissions than pre-plant UAN with dual inhibitors.

    Delaying application and injecting nitrogen fertilizer with urease and nitrification inhibitors decreased nitrous oxide emissions and enhanced corn yields · 2025 · compared with pre‐plant injected UAN with a urease and nitrification inhibitor

    Opposite direction

  4. no effect
    Ammonia volatilization did not differ significantly between streamed and injected UAN in the two-year average.

    Streaming Urea Ammonium Nitrate with or without Enhanced Efficiency Products Impacted Corn Yields, Ammonia, and Nitrous Oxide Emissions · 2018 · compared with InjUAN

    No difference from an alternative

  5. positive
    Injected UAN reduced ammonia loss by 60% relative to broadcast urea.

    Combining Urease and Nitrification Inhibitors with Incorporation Reduces Ammonia and Nitrous Oxide Emissions and Increases Corn Yields · 2017 · compared with broadcast urea

    Same direction

  6. positive
    UAN reduced N2O emissions from summer maize compared with urea

    Effects of Urea-Ammonium Nitrate Solution on Yield, N2O Emission, and Nitrogen Efficiency of Summer Maize Under Integration of Water and Fertilizer · 2021 · compared with urea treatment

    Same direction

See all 7 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.