Intervention effectmodel-written summary

Corn yields equaled the weed-free check for winter annual weed control with between-row mowing plus banded glyphosate at 1.1 kg ae/ha followed by summer annual weed control with banded atrazine plus S-metolachlor at 2.2 plus 1.8 kg ai/ha and between-row mowing.

A claim from Control of Both Winter Annual and Summer Annual Weeds in No-till Corn with Between-row Mowing Systems · 2007

Intervention effectobservedoriginal resultpositivemeasured

Claim · model-written summary

Corn yields equaled the weed-free check for winter annual weed control with between-row mowing plus banded glyphosate at 1.1 kg ae/ha followed by summer annual weed control with banded atrazine plus S-metolachlor at 2.2 plus 1.8 kg ai/ha and between-row mowing.

Treatment
winter annual weed control with between-row mowing plus preplant, banded, postemergence-applied glyphosate at 1.1 kg ae/ha and later summer annual weed control with postplant, banded, preemergence-applied atrazine plus S-metolachlor at 2.2 plus 1.8 kg ai/ha followed by between-row mowinge1
Outcome
Corn yieldse1
Direction
equalede1
Comparator
weed-free checke1

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

e1

“Corn yields for the following no-till weed management systems equaled the weed-free check: winter annual weed control with between-row mowing plus preplant, banded, postemergence-applied glyphosate at 1.1 kg ae/ha and later summer annual weed control with postplant, banded, preemergence-applied atrazine plus S-metolachlor at 2.2 plus 1.8 kg ai/ha followed by between-row mowing”

✓ located verbatim in the source · abstract, characters 688–1067

Title

Control of Both Winter Annual and Summer Annual Weeds in No-till Corn with Between-row Mowing Systems

William W. Donald Weed Technology 2007. doi:10.1614/wt-05-141.1

Other claims from this paper (7)

Record rev-6adcb1b375e8036cd147b396acce1e0f16a96f010578d9bdbf95ca2115ee1e84 · schema claims-v0.9 · position 3 in the model’s answer

glyphosate · yield · Zea mays (maize)Results differ

77 papers: 42 positive, 35 negative or no effect

41 papers in the same direction as this claim · 29 in the opposite direction · 6 reporting no difference from an alternative

  1. negative
    Early glyphosate at the three highest rates reduced corn yield by 22 to 78% on average.

    Rice (Oryza sativa) and Corn (Zea mays) Response to Simulated Drift of Glyphosate and Glufosinate1 · 2003

    Opposite direction

  2. negative
    Weeds that emerged after the 5-cm glyphosate timing reduced soil moisture and grain yield at both locations.

    Effect of Weed Removal Timing and Row Spacing on Soil Moisture in Corn (Zea mays) · 2006

    Opposite direction

  3. no effect
    Cultivation after glyphosate did not affect corn yield.

    Influence of Herbicide Application Rate, Timing, and Interrow Cultivation on Weed Control and Corn (Zea mays) Yield in Glufosinate-Resistant and Glyphosate-Resistant Corn · 1999

    Opposite direction

  4. negative
    Simulated glyphosate drift reduced grain yield by 49-54% in non-GR corn.

    Glyphosate Effect on Shikimate, Nitrate Reductase Activity, Yield, and Seed Composition in Corn · 2010

    Opposite direction

  5. negative
    Glyphosate applied to corn at the time of application sometimes reduced seed weight.

    The Effects of Fall Application of Glyphosate on Corn (Zea mays), Soybeans (Glycine max), and Johnsongrass (Sorghum halepense) · 1981

    Opposite direction

  6. negative
    Glyphosate drift at 200 g/ha reduced yield by 49 to 56%.

    Response of Corn to Simulated Glyphosate Drift Followed by In-Crop Herbicides · 2009

    Opposite direction

  7. no effect
    Glyphosate did not affect maize yield, aside from occasional inconsistent effects.

    Glyphosate Resistance Technology Has Minimal or No Effect on Maize Mineral Content and Yield · 2018

    Opposite direction

  8. no effect
    Corn yield did not differ among glyphosate products or rates.

    Comparison of Glyphosate Products in Glyphosate-Resistant Cotton (Gossypium hirsutum) and Corn (Zea mays)1 · 2005 · compared with rates

    Opposite direction

68 papers more in this group

See all 77 papers →

atrazine · yield · Zea mays (maize)Results differ

240 papers: 205 positive, 35 negative or no effect

204 papers in the same direction as this claim · 29 in the opposite direction · 6 reporting no difference from an alternative

  1. negative
    Corn grain yield fell 39% in year five where atrazine had been discontinued.

    Weed Seed Decline in Irrigated Soil after Six Years of Continuous Corn(Zea mays)and Herbicides · 1984

    Opposite direction

  2. no effect
    Sweet corn yields at Blackville and Tifton were similar between the half and full rates of atrazine plus S-metolachlor after wild radish or rye cover crops.

    Use of Wild Radish (Raphanus raphanistrum) and Rye Cover Crops for Weed Suppression in Sweet Corn · 2008

    Opposite direction

  3. negative
    Reducing atrazine and metolachlor to one-fourth the rate in the absence of cover crop reduced corn yield in two of four years compared with the standard treatment.

    Reduced-Herbicide Weed Management Systems for No-Tillage Corn (Zea mays) in a Hairy Vetch (Vicia villosa) Cover Crop · 1993 · compared with the standard treatment

    Opposite direction

  4. no effect
    Hairy vetch cover yields did not differ with or without atrazine and metolachlor.

    Cover Crop Management and Weed Suppression in No-tillage Sweet Corn Production · 2004 · compared with without atrazine and metolachlor

    Opposite direction

  5. no effect
    Rimsulfuron applied with atrazine or dicamba, in tank mixture or sequentially, gave corn yield similar to rimsulfuron applied alone.

    Dicamba and Atrazine Antagonism on Sulfonylurea Herbicides Used for Johnsongrass (Sorghum halepense) Control in Corn (Zea mays)1 · 2001 · compared with that applied alone

    Opposite direction

  6. no effect
    Handweeding and atrazine gave similar grain yields with tine cultivation when weeds were controlled within 14 days of emergence.

    Use of Tine-tillage, with Atrazine Weed Control, to Permit Earlier Planting of Maize by Smallholder Farmers in Zimbabwe · 1992 · compared with Handweeding

    Opposite direction

  7. no effect
    Atrazine, cyanazine, alachor, linuron and their combinations had no significant effect on corn yields.

    Planting Corn in Sod and Small Grain Residues with Minimum Tillage1 · 1976

    Opposite direction

  8. negative
    Yield fell at all POST timings with atrazine alone or no PRE herbicide.

    Effect of Residual Herbicide and Postemergence Application Timing on Weed Control and Yield in Glyphosate-Resistant Corn · 2011 · compared with absence of PRE herbicide

    Opposite direction

231 papers more in this group

See all 240 papers →

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

174 papers: 86 positive, 88 negative or no effect

85 papers in the same direction as this claim · 86 in the opposite direction · 2 reporting no difference from an alternative

  1. no effect
    Earlier mowing did not increase corn yield.

    Preemergence Banded Herbicides Followed by Only One Between-Row Mowing Controls Weeds in Corn · 2006

    Opposite directionCited by this paper

  2. positive
    Mowing conversion let corn yield reach 85% of the weed-free control.

    A mowing strategy to convert red clover to annual crops in organic farming · 2016 · compared with weed-free control

    Same directionCites this paper

  3. negative
    Defoliated plants showed compensatory reductions in kernels per ear.

    Effect of Altered Source‐Sink Ratio on Growth of Maize Kernels1 · 1983

    Opposite direction

  4. negative
    Complete defoliation reduced maize yield by 6.4 to 82%, more than partial defoliation.

    Dry Matter Accumulation in Maize in Response to Defoliation1 · 1976 · compared with partial defoliation

    Opposite direction

  5. no effect
    Calculated milk yield of the leafy hybrid showed no change as cutting height increased from 15 to 46 cm.

    Hybrid, Maturity, and Cutting Height Interactions on Corn Forage Yield and Quality · 2004 · compared with 15

    Opposite direction

  6. no effect
    Detasseling did not affect grain yield.

    Effect of detasseling on baby corn, green ear and grain yield of two maize hybrids · 2010

    Opposite direction

  7. no effect
    Complete V7 defoliation did not reduce yield in most comparisons.

    Corn Yield Components and Yield Responses to Defoliation at Different Row Widths · 2017

    Opposite direction

  8. negative
    Defoliation reduced grain yield equally in all selection cycles.

    Defoliation and Plant Density Effects on Maize Selected for Reduced Plant Height · 1993

    Opposite direction

165 papers more in this group

See all 174 papers →

3 of 4 groups shown: named compounds and organisms first, then groups whose results differ (checked claim by claim), then those with positive and negative results, then the smaller groups.

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.