Intervention effectmodel-written summary

Injecting UAN raised yield, leaf N and N uptake over broadcast and surface banding.

A claim from Nitrogen Source, Rate, and Application Method for No‐Tillage Corn · 1989

Intervention effectobservedoriginal resultpositivesignificant (as stated)measured

Claim · model-written summary

Injecting UAN raised yield, leaf N and N uptake over broadcast and surface banding.

Treatment
Injecting UANe0
Outcome
yield, leaf N concentration, and N uptakee0
Direction
highere0
Comparator
broadcast and surface band application methodse0

Not reportedMaterialGeneCompoundOrgan / stageInteractorInteractor roleSecond interactorSecond interactor roleSettingValueQualifier

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

e0

“Injecting UAN and urea resulted in significantly higher yield, leaf N concentration, and N uptake when compared with broadcast and surface band application methods”

✓ located verbatim in the source · abstract, characters 797–960
t0

“Corn”

✓ located verbatim in the source · title, characters 61–65

Title

Nitrogen Source, Rate, and Application Method for No‐Tillage Corn

Donald D. Howard; Donald D. Tyler Soil Science Society of America Journal 1989. doi:10.2136/sssaj1989.03615995005300050046x

Other claims from this paper (6)

Record rev-e048030b44faa6b5267608b4549f610555d1e91d48dec80187d8df8dabdb81fd · schema claims-v0.9 · position 2 in the model’s answer

urea ammonium nitrate · yield · Zea mays (maize)Positive and negative results

25 papers: 18 positive, 7 negative or no effect

17 papers in the same direction as this claim · 6 in the opposite direction · 1 reporting no difference from an alternative

  1. negative
    Streamed UAN yielded 11% less corn than injected UAN.

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

    Opposite directionCites this paper

  2. no effect
    In 1992, applying NBPT with UAN gave no yield increase.

    Ridge‐Till Corn and Urea Hydrolysis Response to NBPT · 1997

    Opposite directionCites this paper

  3. positive
    Injected UAN cost $12 per acre less than the least-cost broadcast option in 1983.

    Economic Analysis of Nitrogen Sources and Placement Methods in No‐Tillage Corn · 1995 · compared with least costly broadcastalternative

    Same directionCites this paper

  4. no effect
    Amending UAN with ammonium thiosulfate did not significantly change yield, ear-leaf nitrogen or nitrogen uptake in the tested year.

    Nitrogen Fertilizer Source, and Method and Time of Application Effects on No‐till Corn Yields and Nitrogen Uptakes1 · 1986 · compared with unamended surface‐applied counterparts

    Opposite direction

  5. no effect
    Adding AgrotainPlus to UAN did not influence corn grain yield.

    Corn Response to Enhanced‐Efficiency Nitrogen Fertilizers and Poultry Litter · 2014

    Opposite direction

  6. negative
    Urea‐ammonium nitrate solution produced lower corn yields than ammonia in corn residue during both years.

    Response of No‐Tillage Corn Grown in Corn and Soybean Residues to Several Nitrogen Fertilizer Sources1 · 1986 · compared with ammonia

    Opposite direction

  7. no effect
    No significant difference in maize production was observed between the nitrogen sources urea, ammonium nitrate and slow release urea.

    Evaluation of different sources and rates of nitrogen fertilization in maize (Zea mays L.). · 2011

    Opposite direction

  8. no effect
    Spring zone-banded UAN supplied no growth, nutrient or yield benefit over sidedress UAN.

    Optimization of nitrogen and phosphorus fertilizer timing and placement in coulter-based strip-till corn systems · 2015 · compared with sidedress UAN application at the higher N rate

    No difference from an alternative

16 papers more in this group

See all 25 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.