Intervention effectmodel-written summary

Averaged across farmers, CT cropping systems increased maize and soybean yield by 23 to 39% compared with NT cropping systems.

A claim from Conservation Agriculture Improves Soil Quality, Crop Yield, and Incomes of Smallholder Farmers in North Western Ghana · 2017

Intervention effectobservedoriginal resultpositivemeasured

Claim · model-written summary

Taxon: maizeZea mayse6
Treatment: CT cropping systemse6
Outcome: maize and soybean yielde6
Direction: increasede6
Value: 23 to 39%e6
Qualifier: Averaged across farmerse6
Comparator: NT cropping systemse6

Not reportedMaterialGeneCompoundOrgan / stageInteractorInteractor roleSecond interactorSecond interactor roleSetting

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

*Zea mays* · TaxonAkwugo · CC BY-SA 4.0 · Wikimedia Commons ↗

Verbatim

e6
“Averaged across farmers, CT cropping systems increased maize and soybean yield ranging from 23 to 39% compared with NT cropping systems”
✓ located verbatim in the source · abstract, characters 1475–1610

Title

Conservation Agriculture Improves Soil Quality, Crop Yield, and Incomes of Smallholder Farmers in North Western Ghana

Jesse B. Naab; George Y. Mahama; Iddrisu Yahaya; et al. Frontiers in Plant Science 2017. doi:10.3389/fpls.2017.00996

Other claims from this paper (11)

Intervention effect No-tillage, residue retention and crop rotation/intercropping maintained higher soil organic carbon and total soil N than conventional tillage after four years.
Intervention effect Soil bulk density was higher under no-tillage than under conventional tillage after four years.
Intervention effect Tillage and cropping systems did not differ significantly in maize or soybean yields in the first three seasons.
Intervention effect In the fourth season, crop rotation (CT maize after soybean) increased maize yield by 41% compared with MT maize.
Intervention effect In the fourth season, crop rotation (CT maize after soybean) increased maize yield by 49% compared with NT maize.
Observation Maize yield in farmer-managed trials ranged from 520 to 2700 kg/ha under CT.
Observation Maize yield in farmer-managed trials ranged from 300 to 2000 kg/ha under NT.
Intervention effect NT systems reduced the cost of producing maize or soybean by 20 to 29% compared with CT practice.
Intervention effect NT systems gave higher returns to labor than CT practice for maize or soybean.
Intervention effect NT cropping systems were more profitable than CT systems, as shown by benefit-to-cost ratios.
Recommendation Conservation agriculture with NT, crop rotation, intercropping and residue retention is a win-win scenario for maize and soybean.

Record rev-26dd71cabb9ee252ad73ac8ce56940be601603ed02843af31796fce0c4200055 · schema claims-v0.9 · position 6 in the model’s answer

cultivation system · yield · Zea mays (maize)Positive and negative results

155 papers: 110 positive, 45 negative or no effect

109 papers in the same direction as this claim · 40 in the opposite direction · 5 reporting no difference from an alternative

negative
Corn yield in the 4-yr OI strategy was 9% lower than in the 2-yr HI strategy in V1.
Organic and Other Management Strategies with Two‐ and Four‐Year Crop Rotations in Minnesota · 2003 · compared with 2‐yr HI strategy
Opposite direction
negative
Organic management reduced maize yields by 36.1% relative to the conventional system.
Yields and resilience outcomes of organic, cover crop, and conventional practices in a Mediterranean climate · 2019 · compared with conventional system
Opposite direction
negative
Organic corn yields were 31% lower than conventional corn yields.
Meteorological fluctuations define long-term crop yield patterns in conventional and organic production systems · 2017 · compared with conventional
Opposite direction
negative
Four-year organic corn yield was 9% lower than two-year high-input yield in V1.
Organic and Other Management Strategies with Two- and Four-Year Crop Rotations in Minnesota · 2003 · compared with 2-yr HI strategy
Opposite direction
no effect
Gross margins did not differ significantly among cropping systems.
EFFECT OF REDUCED TILLAGE AND MINERAL FERTILIZER APPLICATION ON MAIZE AND SOYBEAN PRODUCTIVITY · 2011
Opposite direction
negative
The kura clover system reduced corn grain yields.
Soil Water Dynamics and Nitrate Leaching Under Corn–Soybean Rotation, Continuous Corn, and Kura Clover · 2017 · compared with corn–soybean or continuous corn
Opposite direction
no effect
Cropping system had no significant effect on maize grain yield in either year.
Effect of phosphorus fertilizer application on the performance of maize/soybean intercrop in the southern Guinea savanna of Nigeria · 2011
Opposite direction
negative
The PGC system reduced corn grain yields by as much as 50%.
Seed Size, Planting Depth, and a Perennial Groundcover System Effect on Corn Emergence and Grain Yield · 2022 · compared with bare-soil cropping system
Opposite direction

146 papers more in this group

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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

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 directionCited by this paper
negative
Corn produced less grain with no-till than with plow.
Tillage and Rotation Interactions for Corn and Soybean Grain Yield as Affected by Precipitation and Air Temperature · 2004 · compared with plow
Opposite directionCited by this paper
positive
CA improved maize grain yield, especially in two- or three-year rotations.
ROTATION IN CONSERVATION AGRICULTURE SYSTEMS OF ZAMBIA: EFFECTS ON SOIL QUALITY AND WATER RELATIONS · 2010
Same directionCited by this paper
positive
In Lemu, CA monocrop maize yielded 2.7 Mg ha −1 more than conventional tillage in 2009/10.
Conservation agriculture systems for Malawian smallholder farmers: long-term effects on crop productivity, profitability and soil quality · 2012 · compared with conventional tillage
Same directionCited by this paper
positive
Conservation agriculture gave 1400 kg ha−1 more maize grain yield than conventional tillage in season two.
Productivity and profitability of maize-legume cropping systems under conservation agriculture among smallholder farmers in Malawi · 2020 · compared with CT
Same directionCites this paper
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
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
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

1,090 papers more in this group

See all 1,099 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.

Other papers on the same question

cultivation system · yield · Zea mays (maize)Positive and negative results

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