Intervention effectmodel-written summary

Compared with conventional tillage, conservation agriculture gave higher labour productivity.

A claim from Profitability and opportunity of conservation agriculture in acid savannah grasslands of Laos · 2013

Intervention effectobservedoriginal resultpositivemeasured

Claim · model-written summary

Compared with conventional tillage, conservation agriculture gave higher labour productivity.

Taxon
rice/maize/soybeanGlycine maxOryza sativaZea mayse2
Treatment
no-tillage with cover cropse2
Outcome
labour productivitye1
Direction
highere1
Qualifier
regardless of fertilization levelse1
Comparator
CTe1
Setting
north-eastern Laose0

Not reportedMaterialGeneCompoundOrgan / stageInteractorInteractor roleSecond interactorSecond interactor roleValue

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

Glycine max
Glycine max · TaxonPublic domain · Wikimedia Commons ↗
Oryza sativa
Oryza sativa · Taxon · picture from its Wikimedia Commons categoryDesmanthus4food · CC BY-SA 3.0 us · Wikimedia Commons ↗
Zea mays
Zea mays · TaxonAkwugo · CC BY-SA 4.0 · Wikimedia Commons ↗

Verbatim

e0

“In north-eastern Laos”

✓ located verbatim in the source · abstract, characters 0–21
e1

“compared with CT, CA systems led to similar-to-higher grain production, similar-to-higher profits, higher opportunity of livestock system intensification, and higher labour productivity regardless of fertilization levels”

✓ located verbatim in the source · abstract, characters 714–934
e2

“A three-year rotation of rice/maize/soybean was tested under three fertilization levels and four agricultural systems: one conventional tillage-based (CT) system and three CA systems based on no-tillage with cover crops”

✓ located verbatim in the source · abstract, characters 441–660

Title

Profitability and opportunity of conservation agriculture in acid savannah grasslands of Laos

Pascal Lienhard; Khamkéo Panyasiri; Sengphanh Sayphoummie; et al. International Journal of Agricultural Sustainability 2013. doi:10.1080/14735903.2013.806419

Other claims from this paper (4)

Record rev-eee09b4896d5e39dddcf0ffea313171a6d32ced89abe91733beef9a39e32597a · schema claims-v0.9 · position 4 in the model’s answer

cover crop · yield · Oryza sativa (rice)Results differ

25 papers: 17 positive, 8 negative or no effect

16 papers in the same direction as this claim · 7 in the opposite direction · 1 reporting no difference from an alternative

  1. no effect
    Cover crop treatments gave similar yield components and grain yield of upland rice.

    Cover crops can affect soil attributes and yield of upland rice. · 2016

    Opposite direction

  2. no effect
    Cover crops did not influence rice grain yield.

    Do cover crops improve the productivity and industrial quality of upland rice? · 2020

    Opposite direction

  3. negative
    The living mulch reduced rice yield by 14%, but yield remained significantly higher in no-till than in conventional tillage.

    No‐till with Stylosanthes guianensis cover crop affects weed community and improves weed management in upland rainfed rice in Madagascar · 2023

    Opposite direction

  4. negative
    Cover crop implementation significantly reduced profitability.

    Balancing cover crop benefits and economic realities in Mediterranean rice farming · 2025

    Opposite direction

  5. no effect
    Nitrogen and cover crop had no significant interaction on grain yield.

    Effect of Sesbania sesban L. as a Green Manure on Yield of Rainfed-lowland Rice · 2024

    Opposite direction

  6. no effect
    Cover crops did not affect rough rice grain yield in any site-year.

    Impact of cover crops on furrow-irrigated rice and Palmer amaranth (Amaranthus palmeri) emergence · 2025

    Opposite direction

  7. no effect
    Winter cover crop incorporation did not significantly change GHG dynamics or crop productivity.

    Improving net carbon balance and irrigation water productivity of subtropical organic double-rice cropping through a near-saturation water-saving management · 2026

    Opposite direction

  8. no effect
    Rice grain yields were similar under all cover crops.

    Effects of grain-producing cover crops on rice grain yield in Cabo Delgado, Mozambique · 2017 · compared with all cover crops

    No difference from an alternative

16 papers more in this group

See all 25 papers →

cover crop · yield · Glycine max (soybean)Positive and negative results

101 papers: 33 positive, 68 negative or no effect

32 papers in the same direction as this claim · 57 in the opposite direction · 11 reporting no difference from an alternative

  1. no effect
    Without herbicides, no cover crop increased soybean yield above no-cover conventional tillage.

    Effects of Cereal and Legume Cover Crop Residues on Weeds, Yield, and Net Return in Soybean (Glycine max)1 · 2001 · compared with no-cover crop CT system

    Opposite direction

  2. no effect
    Under weed-free conditions, soybean yields with cover crop mulches did not differ from bare soil controls.

    Effect of Cover Crop Mulches on Weed Emergence, Weed Biomass, and Soybean (Glycine max) Development · 1994 · compared with bare soil controls

    Opposite direction

  3. negative
    The oat cover crop reduced soybean yield in only one year.

    Oat and rye overseeded into soybean as fall cover crops in the upper Midwest · 1998

    Opposite direction

  4. negative
    The rye cover crop gave a lower net return than no-cover crop CT, $29/ha against $84/ha.

    Impact of Rye Cover Crop and Herbicides on Weeds, Yield, and Net Return in Narrow-Row Transgenic and Conventional Soybean (Glycine max)1 · 2003 · compared with no–cover crop CT

    Opposite direction

  5. no effect
    Soybean yield with cover crops was not different from controls.

    Short‐Term Effects of Cover Crops and Compaction on Soil Properties and Soybean Production in Illinois · 2014 · compared with control plots

    Opposite direction

  6. negative
    Oilseed cover crop treatments likely reduced soybean yield by 22 to 30%.

    Economics and Agronomics of Relay‐Cropping Pennycress and Camelina with Soybean in Minnesota · 2019 · compared with Mono‐cropped soybean

    Opposite direction

  7. no effect
    Soybean yield remained stable across locations and was unaffected by cover-crop termination date.

    Planting Green Effects on Corn and Soybean Production · 2019

    Opposite direction

  8. no effect
    Seeding date and cover crops did not reduce maize or soybean grain yields.

    Establishing winter annual cover crops by interseeding into Maize and Soybean · 2020

    Opposite direction

92 papers more in this group

See all 101 papers →

cover crop · yield · Zea mays (maize)Positive and negative results

222 papers: 104 positive, 118 negative or no effect

103 papers in the same direction as this claim · 104 in the opposite direction · 14 reporting no difference from an alternative

  1. 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

  2. negative
    Incorporated ryegrass reduced subsequent maize grain yield by 13%.

    Alysimeter study of the effects of a ryegrass catch crop, during a winter wheat/maize rotation, on nitrate leaching and on the following crop · 1990

    Opposite direction

  3. no effect
    Kura clover can be managed as a living mulch in corn with little or no reduction in corn yield.

    Corn Production with Kura Clover as a Living Mulch · 2000

    Opposite direction

  4. no effect
    Cover crops did not affect corn grain yield.

    Establishment and Function of Cover Crops Interseeded into Corn · 2018

    Opposite direction

  5. negative
    Corn yield was reduced following rye and oat-rye cover crops.

    Oat and rye overseeded into soybean as fall cover crops in the upper Midwest · 1998

    Opposite direction

  6. negative
    Cover crops other than hairy vetch alone reduced sweet corn emergence, height, and yield.

    Weed Control and Sweet Corn (Zea maysvar.rugosa) Response in a No-till System with Cover Crops · 1996

    Opposite direction

  7. no effect
    Cover crops in monoculture and mixtures did not influence corn yield.

    Cover Crop Options and Mixes for Upper Midwest Corn–Soybean Systems · 2017

    Opposite direction

  8. no effect
    Cover crops had no significant effect on maize yield.

    Effects of Cover Crops and Phosphorus Sources on Maize Yield, Phosphorus Uptake, and Phosphorus Use Efficiency · 2017

    Opposite direction

213 papers more in this group

See all 222 papers →

3 of 6 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.