Intervention effectmodel-written summary

Across cover treatments, conventional tillage produced more grain yield than no tillage.

A claim from Tillage Effects on Nitrogen Recovery by Corn from a Nitrogen‐15 Labeled Legume Cover Crop · 1989

Intervention effectobservedoriginal resultpositivemeasured

Claim · model-written summary

Across cover treatments, conventional tillage produced more grain yield than no tillage.

Treatment
CTe0
Outcome
grain yielde0
Direction
moree0
Comparator
NTe0

Not reportedTaxonMaterialGeneCompoundOrgan / stageInteractorInteractor roleSecond interactorSecond interactor roleSettingValueQualifier

Verbatim

e0

“Averaged across cover treatments, CT resulted in more grain yield than with NT.”

✓ located verbatim in the source · abstract, characters 923–1002

Title

Tillage Effects on Nitrogen Recovery by Corn from a Nitrogen‐15 Labeled Legume Cover Crop

J. J. Varco; W. W. Frye; M. S. Smith; et al. Soil Science Society of America Journal 1989. doi:10.2136/sssaj1989.03615995005300030033x

Other claims from this paper (12)

Record rev-af0e86f30161cbbda20439b99ac90331f584167fde18b7c363e0b61e39aa26be · schema claims-v0.9 · position 5 in the model’s answer

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

1,099 papers: 812 positive, 287 negative or no effect

811 papers in the same direction as this claim · 230 in the opposite direction · 57 reporting no difference from an alternative

  1. no effect
    No-tillage did not reduce yields from emerged seedlings on a per plant basis for any cover crop.

    Effects of Cover Crops, Nitrogen, and Tillage on Sweet Corn · 2002

    Opposite directionCites this paper

  2. no effect
    Corn yield did not differ between tillage systems.

    Nitrogen availability as affected by ten years of cover crop and tillage systems in southern Brazil · 1998

    Opposite directionCites this paper

  3. no effect
    Corn production was not affected by tillage treatment.

    Nitrogen supply from fertilizer and legume cover crop in the transition to no-tillage for irrigated row crops · 2009

    Opposite directionCites this paper

  4. no effect
    Cover-crop no-tillage and standard no-tillage gave similar corn yields.

    Potential Long‐Term Benefits of No‐Tillage and Organic Cropping Systems for Grain Production and Soil Improvement · 2007 · compared with NT

    Opposite direction

  5. negative
    No-till produced less corn grain than plow tillage.

    Tillage and Rotation Interactions for Corn and Soybean Grain Yield as Affected by Precipitation and Air Temperature · 2004 · compared with plow

    Opposite direction

  6. no effect
    Tillage had no grain-yield effect in manure or compost plots in three of four years.

    Composted and Noncomposted Manure Application to Conventional and No‐Tillage Systems: Corn Yield and Nitrogen Uptake · 1999

    Opposite direction

  7. negative
    No-tillage corn grain yield was 5% lower than under conventional tillage.

    Corn and Soybean Response to Rotation Sequence, Row Spacing, and Tillage System · 2003 · compared with conventional tillage system

    Opposite direction

  8. negative
    Continuous no-till corn on Chalmers soil was 2% wetter at harvest than plowed corn.

    Long‐Term Tillage and Rotation Effects on Corn Growth and Yield on High and Low Organic Matter, Poorly Drained Soils · 1988 · compared with plowing

    Opposite direction

1,090 papers more in this group

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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.