Intervention effectmodel-written summary

Corn cob biochar mixed with manure improved corn yields on entisol.

A claim from Soil amendment impact to soil organic matter and physical properties on the three soil types after second corn cultivation · 2020

Intervention effectobservedoriginal resultpositivemeasured

Claim · model-written summary

Corn cob biochar mixed with manure improved corn yields on entisol.

Treatment
Biochar from corn cob mixed with manuree0
Outcome
corn yieldse0
Direction
bettere0
Setting
entisole0

Not reportedMaterialGeneCompoundOrgan / stageInteractorInteractor roleSecond interactorSecond interactor roleComparatorValueQualifier

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

e0

“Biochar from corn cob mixed with manure is effective to get better corn yields from entisol.”

✓ located verbatim in the source · abstract, characters 2221–2313

Title

Soil amendment impact to soil organic matter and physical properties on the three soil types after second corn cultivation

Widowati; Sutoyo; Hidayati Karamina; et al. AIMS Agriculture and Food 2020. doi:10.3934/agrfood.2020.1.150

Other claims from this paper (4)

Record rev-5d1207f4e600c72eadea723c43cb7fa0f328d116e371654909cd3a445fb726ed · schema claims-v0.9 · position 2 in the model’s answer

Zea mays subsp. mays · yield · Zea mays (maize)Results differ

292 papers: 196 positive, 96 negative or no effect

195 papers in the same direction as this claim · 85 in the opposite direction · 11 reporting no difference from an alternative

  1. no effect
    Increased corn density had no net yield benefit.

    Effect of Planting Patterns and Inter-row Cultivation on Competition Between Corn (Zea mays) and Late Emerging Weeds · 1996

    Opposite direction

  2. no effect
    Planting corn in narrow rows did not increase grain yield.

    Integrated Weed Management Using Narrow Corn Row Spacing, Herbicides, and Cultivation · 1998

    Opposite direction

  3. negative
    Planting on 13 July reduced grain yield by 42% in Azir in 2006.

    Planting Date and Cultivar Effects on Grain Yield in Dryland Corn Production · 2009

    Opposite direction

  4. negative
    Yellow mustard seeded over the corn row at 530 seeds m-2 reduced average corn grain yield by 4% compared with corn in monoculture.

    Simulation of Spring-Seeded Smother Plants for Weed Control in Corn (Zea mays) · 1994 · compared with corn grown in monoculture

    Opposite direction

  5. negative
    Colonial bentgrass as living mulch significantly reduced sweet corn and cabbage yields.

    Screening of Turfgrasses and Clovers for Use as Living Mulches in Sweet Corn and Cabbage · 1983

    Opposite direction

  6. no effect
    Milk production did not differ between corn silage hybrids in the third trial.

    Corn Silage Hybrid Effects on Intake, Digestion, and Milk Production by Dairy Cows · 2000

    Opposite direction

  7. no effect
    Intersowing cover crops into standing corn did not affect corn yield in the three experiments.

    Establishment and Impact of Cover Crops Intersown into Corn · 2016 · compared with no‐cover‐crop treatment

    Opposite direction

  8. no effect
    Delayed corn planting dates had little impact on corn yield in disk-killed or roll-killed treatments.

    Reduced‐Tillage Organic Corn Production in a Hairy Vetch Cover Crop · 2012

    Opposite direction

283 papers more in this group

See all 292 papers →

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

193 papers: 175 positive, 18 negative or no effect

174 papers in the same direction as this claim · 15 in the opposite direction · 3 reporting no difference from an alternative

  1. positive
    Maize cob biochar at 4 t/ha increased maize yield to 444% ± 114% of the fertilized reference plots in Kaoma sandy soil.

    Biochar Effect on Maize Yield and Soil Characteristics in Five Conservation Farming Sites in Zambia · 2013 · compared with fertilized reference plots

    Same directionCited by this paper

  2. positive
    Biochar addition gave a consistent positive response in crop yield at all sites.

    Farmer‐led maize biochar trials: Effect on crop yield and soil nutrients under conservation farming · 2014

    Same directionCited by this paper

  3. positive
    Compost plus biochar produced superior maize grain yield of 3.45 t ha − 1.

    Impact of various soil amendments on temporal NPK release, soil quality and maize yield in tropical Alfisols of Zaria, Nigeria · 2025

    Same directionCites this paper

  4. negative
    Without supplementary nitrogen, 72 t ha-1 biochar decreased maize grain yield by 46%.

    Biochar application to temperate soils: effects on nutrient uptake and crop yield under field conditions · 2013

    Opposite direction

  5. no effect
    Biochar did not increase maize biomass production in 2015.

    Analysis of soil water content and crop yield after biochar application in field conditions · 2017 · compared with 0 t/ha (control)

    Opposite direction

  6. negative
    Straw biochar significantly reduced summer maize yield by 8%.

    Effects of Organic Amendments on the Improvement of Soil Nutrients and Crop Yield in Sandy Soils during a 4-Year Field Experiment in Huang-Huai-Hai Plain, Northern China · 2021

    Opposite direction

  7. no effect
    Biochar gave no obvious improvement in carbon input and crop yield.

    Carbon Input and Maize Productivity as Influenced by Tillage, Crop Rotation, Residue Management and Biochar in a Semiarid Region in South Africa · 2020

    Opposite direction

  8. no effect
    Productivity did not vary significantly under biochar.

    Wood biochar produces different rates of root growth and transpiration in two maize hybrids (Zea mays L.) under drought stress · 2018

    Opposite direction

184 papers more in this group

See all 193 papers →

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

3,908 papers: 3,485 positive, 423 negative or no effect

3,484 papers in the same direction as this claim · 338 in the opposite direction · 85 reporting no difference from an alternative

  1. positive
    N fertilizer increased corn yields.

    Nitrogen Fertilizer and Dairy Manure Effects on Corn Yield and Soil Nitrate · 1992

    Same directionCited by this paper

  2. positive
    The bioameliorant formulation of 25% compost, 25% cattle manure, 25% rice husk charcoal and 25% mycorrhizal biofertilizer increased the yield of maize and soybean intercropping compared with no bioameliorant.

    The application of several bioameliorant formulations to increase soil nutrient concentration and yields maize-soybeans intercropping flexible to climate change in suboptimal land North Lombok, Indonesia · 2023 · compared with without bioameliorant

    Same directionCites this paper

  3. positive
    LER was highest at high plant density (D3) with compost + sulfur.

    Effect of Maize Plant Density, Compost and Sulfur on Productivity of Intercropped Maize and Tomato and some Soil Properties · 2021

    Same directionCites this paper

  4. negative
    If the V8 sufficiency index was below 90%, in-season nitrogen application did not attain maximum yields.

    Ability for In‐Season Correction of Nitrogen Deficiency in Corn Using Chlorophyll Meters · 1997

    Opposite direction

  5. no effect
    N fertilization did not significantly influence belowground NPP of corn.

    Nitrogen fertilizer effects on soil carbon balances in Midwestern U.S. agricultural systems · 2009

    Opposite direction

  6. negative
    Average grain yield of maize was reduced by 37% at low N (no N fertilizer) compared with high N.

    Improving Nitrogen‐Use Efficiency in European Maize · 2003 · compared with HN

    Opposite direction

  7. no effect
    2 t pm/ha + 30-20-20 kg NPK/ha gave maize biomass and grain yields similar to 4 t pm/ha.

    Poultry manure effect on growth and yield of maize · 2009 · compared with 4 t pm/ha

    Opposite direction

  8. no effect
    Maize yields did not respond to P fertilization.

    Arbuscular mycorrhizal fungi in soil and roots respond differently to phosphorus inputs in an intensively managed calcareous agricultural soil · 2016

    Opposite direction

3,899 papers more in this group

See all 3,908 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.