Intervention effectmodel-written summary

Alternate irrigation increased combined wheat and maize yield by 12.9 on average.

A claim from Water Use Characteristics of Alternately Irrigated Wheat/Maize Intercropping in Oasis Region of Northwestern China · 2011

Intervention effectobservedoriginal resultpositivemeasured

Claim · model-written summary

Alternate irrigation increased combined wheat and maize yield by 12.9 on average.

Treatment
alternately irrigated intercropping treatmente0t0e1e2e3
Outcome
total yielde0t0e1e2e3
Direction
increasede0t0e1e2e3
Value
12.9e0t0e1e2e3

Not reportedMaterialGeneCompoundOrgan / stageInteractorInteractor roleSecond interactorSecond interactor roleComparatorSettingQualifier

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

Triticum aestivum
Triticum aestivum · TaxonRasbak · CC BY-SA 3.0 · Wikimedia Commons ↗
Zea mays
Zea mays · TaxonAkwugo · CC BY-SA 4.0 · Wikimedia Commons ↗

Verbatim

e0

“the total yield of wheat and maize in the alternately irrigated intercropping treatment was increased by 12.9 averagely”

✓ located verbatim in the source · abstract, characters 1418–1537
t0

“Wheat/Maize Intercropping”

✓ located verbatim in the source · title, characters 51–76
e1

“there was no significant change of wheat yield in the alternately irrigated intercropping treatment”

✓ located verbatim in the source · abstract, characters 1254–1353
e2

“The water consumption in the alternately irrigated intercropping treatment had no significant increase compared to that of the conventionally irrigated intercropping treatment”

✓ located verbatim in the source · abstract, characters 1538–1713
e3

“The WUE of alternatiely irrigated intercropping treatment was 0.9-22.5% higher than that of the conventionally irrigated intercropping treatment”

✓ located verbatim in the source · abstract, characters 1791–1935

Title

Water Use Characteristics of Alternately Irrigated Wheat/Maize Intercropping in Oasis Region of Northwestern China

Yang Cai ACTA AGRONOMICA SINICA 2011

Other claims from this paper (9)

Record rev-1cbd6a0a3569b576dc255da7a5075bcc5f110d15de32003d33aab1d3330fe51b · schema claims-v0.9 · position 5 in the model’s answer

intercropping · yield · Triticum aestivum (wheat)Results differ

189 papers: 131 positive, 58 negative or no effect

130 papers in the same direction as this claim · 51 in the opposite direction · 7 reporting no difference from an alternative

  1. negative
    Intercropping reduced yields of the component crops relative to pure stands.

    Evaluation of Wheat (Triticum aestivum) and Legume Intercropping Under 1:1 and 2:1 Row‐replacement Series System · 1996 · compared with respective pure stands

    Opposite direction

  2. negative
    Winter pea intercropping reduced wheat yield relative to monoculture.

    Yield and Nutritive Value of Irrigated Winter Cereal Forage Grass–Legume Intercrops in the Southern High Plains, USA · 2004 · compared with monocultures

    Opposite direction

  3. negative
    Wheat nitrogen yield per area was lower in all four intercrops than in monocrop.

    Nitrogen economy in relay intercropping systems of wheat and cotton · 2007 · compared with monocrop

    Opposite direction

  4. no effect
    Wheat grain yield was unaffected by intercropping.

    Grain Yield and Weed Biomass of a Wheat–Lentil Intercrop · 1995

    Opposite direction

  5. negative
    Mean number of fertile florets per spike of wheat decreased by 26.4%, 37.4% and 49.5% in the jujube, apricot and walnut intercropping systems.

    Impact of fruit-tree shade intensity on the growth, yield, and quality of intercropped wheat · 2019

    Opposite direction

  6. negative
    Intercropping decreased wheat grain yield, harvest index and thousand grain weight.

    Effect of different Planting Pattern of Wheat (Triticum aestivum) and Bean (Vicia faba) on Grain Yield, Dry Matter Production and Weed Biomass · 2010

    Opposite direction

  7. negative
    Wheat yield was reduced by 23 and 16% when soybean was intercropped in the drilled and skiprow patterns, respectively.

    Intercropping Soybean into Standing Green Wheat1 · 1987 · compared with conventional

    Opposite direction

  8. negative
    Relay intercropping soybeans into solid wheat reduced wheat yield by 4%.

    Relay Intercropping Soybeans into Wheat in Kansas · 1990

    Opposite direction

180 papers more in this group

See all 189 papers →

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

834 papers: 613 positive, 221 negative or no effect

612 papers in the same direction as this claim · 181 in the opposite direction · 40 reporting no difference from an alternative

  1. no effect
    When intercropped with beans, the yields of organic and conventional systems were similar.

    Productivity, profitability and partial nutrient balance in maize-based conventional and organic farming systems in Kenya · 2016

    Opposite direction

  2. no effect
    Seeding intercrops when corn was 0.15 to 0.30 m high did not change first-year corn grain yield.

    Contributions of Ground Cover, Dry Matter, and Nitrogen from Intercrops and Cover Crops in a Corn Polyculture System1 · 1987

    Opposite direction

  3. negative
    At 120 kg N ha−1, legume intercrops reduced maize yields by 18 to 31%.

    Relay‐Intercropping of Sunnhemp and Cowpea into a Smallholder Maize System in Zimbabwe · 2000

    Opposite direction

  4. no effect
    Intercropping did not significantly affect maize grain yield in 2007.

    Effect of Intercropping and Crop Arrangement on Yield and Productivity of Late Season Maize/soybean Mixtures in the Humid Environment of South Southern Nigeria · 2012

    Opposite direction

  5. negative
    Intercropping reduced maize grain yield by 23–70%.

    Yield stability of cassava, maize, soya bean and cowpea intercrops · 2003 · compared with sole crop

    Opposite direction

  6. negative
    Intercropping maize or sorghum with legumes reduced leaf area indices, fresh weight yield at anthesis and straw yield.

    Effects of Intercropping Maize or Sorghum with Cowpeas, Pigeon Peas or Beans · 1973

    Opposite direction

  7. negative
    White lupine intercropping inhibited maize growth and yield.

    Growth and phosphorus uptake of maize cultivated alone, in mixed culture with other crops or after incorporation of their residues · 2003

    Opposite direction

  8. negative
    In maize/beans intercrop, maize yield was depressed by 15% compared with sole maize.

    The effect of planting combinations and weeding on the growth and yield of component crops of maize/bean and maize/pumpkin intercrops · 2002 · compared with its sole yield

    Opposite direction

825 papers more in this group

See all 834 papers →

irrigation · yield · Triticum aestivum (wheat)Positive and negative results

989 papers: 798 positive, 191 negative or no effect

797 papers in the same direction as this claim · 184 in the opposite direction · 7 reporting no difference from an alternative

  1. negative
    Minimum irrigation lowered average winter wheat yield by 14% versus full irrigation.

    Performance of Double‐Cropped Winter Wheat–Summer Maize under Minimum Irrigation in the North China Plain · 2006 · compared with fully irrigated treatment (FI)

    Opposite direction

  2. no effect
    Moderately saline water substituted for good quality water during part of the season maintained total wheat grain yield.

    Time of Salt Stress Affects Growth and Yield Components of Irrigated Wheat · 1994 · compared with good quality water

    Opposite direction

  3. negative
    Saline irrigation caused soil salinization and reduced wheat growth and yield.

    Effect of Straw Biochar on Soil Properties and Wheat Production under Saline Water Irrigation · 2019

    Opposite direction

  4. negative
    Deficit irrigation in salt-affected soil reduced wheat productivity.

    Collaborative Impact of Compost and Beneficial Rhizobacteria on Soil Properties, Physiological Attributes, and Productivity of Wheat Subjected to Deficit Irrigation in Salt Affected Soil · 2022

    Opposite direction

  5. negative
    Wastewater irrigation decreased plant height, leaf area and grain yield in wheat.

    Effect of Wastewater Irrigation on Photosynthesis, Growth, and Anatomical Features of Two Wheat Cultivars (Triticum aestivum L.) · 2020

    Opposite direction

  6. no effect
    An additional 33 mm of irrigation did not increase grain yield.

    Source–sink balance and manipulating sink–source relations of wheat indicate that the yield potential of wheat is sink-limited in high-rainfall zones · 2010

    Opposite direction

  7. no effect
    DI water saving had no effect on wheat yield.

    Yield and water productivity of maize and wheat under deficit and raised bed irrigation practices in Egypt · 2012

    Opposite direction

  8. negative
    Limited irrigation yielded 99% of full irrigation for winter wheat.

    Cropping Systems for Stretching Limited Irrigation Supplies · 1993 · compared with fully irrigated

    Opposite direction

980 papers more in this group

See all 989 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.