Intervention effectmodel-written summary

N+P+K+Ca+Mg+Zn+B+S gave the highest grain yields.

A claim from Prediction of Maize Yields from In-Season GreenSeeker Normalized Difference Vegetation Index and Dry Biomass as Influenced by Different Nutrient Combinations · 2020

Intervention effectobservedoriginal resultpositivemeasured

Claim · model-written summary

N+P+K+Ca+Mg+Zn+B+S gave the highest grain yields.

Taxon
MaizeZea mayst0
Treatment
N+P+K+Ca+Mg+Zn+B+Se0
Outcome
grain yieldse0
Direction
higheste0

Not reportedMaterialGeneCompoundOrgan / stageInteractorInteractor roleSecond interactorSecond interactor roleComparatorSettingValueQualifier

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

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

Verbatim

t0

“Prediction of Maize Yields from In-Season GreenSeeker Normalized Difference Vegetation Index and Dry Biomass as Influenced by Different Nutrient Combinations”

✓ located verbatim in the source · title, characters 0–157
e0

“The results showed consistently lowest and highest NDVI reading, dry biomass, and grain yields due to P+K and N+P+K+Ca+Mg+Zn+B+S treatments, respectively.”

✓ located verbatim in the source · abstract, characters 554–708

Title

Prediction of Maize Yields from In-Season GreenSeeker Normalized Difference Vegetation Index and Dry Biomass as Influenced by Different Nutrient Combinations

Hillary M. O. Otieno; George N. Chemining’wa; Shamie Zingore Journal of Agricultural Science 2020. doi:10.5539/jas.v13n1p165

Other claims from this paper (19)

Record rev-d8bbfa19f43b5fc50189409669d884aa3cd8b0be349e10dc5719378309ef12fd · schema claims-v0.9 · position 6 in the model’s answer

calcium atom · yield · Zea mays (maize)Results differ

19 papers: 14 positive, 5 negative or no effect

13 papers in the same direction as this claim · 5 in the opposite direction

  1. negative
    Using Ca(NO3)2 rather than NH4NO3 as N source reduced sweet corn height and yield.

    Sweet Corn Growth Responses and Leaf Concentrations as Affected by Lime Types and Fertilizer Treatments in a Five-year Study · 1984 · compared with NH 4 NO 3

    Opposite direction

  2. no effect
    Sweet corn showed no yield response for 2 years to spring-applied N from Ca(NO3)2, urea, and urea plus nitrapyrin on a loam soil high in organic matter and cation exchange capacity.

    Effect of Nitrogen Source and Nitrapyrin on Sweet Corn1 · 1979

    Opposite direction

  3. no effect
    Leaf area, dry matter and root length did not differ statistically among the aluminum ratio treatments.

    Growth of maize seedlings (Zea mays L. var. Porva) in nutrient solution with low (Ca+Mg+K)/Al ratio. · 2009 · compared with treatments

    Opposite direction

  4. no effect
    Calcium spraying did not affect corn yield.

    Calcium deficiency symptoms in forage corn ( Zea mays L.) due to excessive potassium supply under field conditions: Using leaf serration as a soil potassium indicator · 2026

    Opposite direction

  5. negative
    The combined fungicide and NPCa treatment yielded less than NPK fertilisation.

    Impact of combining fungicide use with calcium fertiliser for managing maize downy mildew · 2026 · compared with NPK fertilisation

    Opposite direction

  6. positive
    Raising calcium from 0.5 to 10.0 millimolar in salinized medium partially restored the elongation zone length, epidermal cell length and apparent cell production rate of maize roots.

    Does Salinity Reduce Growth in Maize Root Epidermal Cells by Inhibiting Their Capacity for Cell Wall Acidification? · 1990 · compared with salinized growth medium

    Same direction

  7. positive
    CMP treatment increased P harvest index and P utilization efficiency in neutral soil.

    Effects of various phosphorus fertilizers on maize yield and phosphorus uptake in soils with different pH values · 2021

    Same direction

  8. positive
    Calcium spray significantly increased maize yield.

    Ameliorative Effects of Calcium Sprays on Yield and Grain Nutritional Composition of Maize (Zea mays L.) Cultivars under Drought Stress · 2021

    Same direction

10 papers more in this group

See all 19 papers →

magnesium atom · yield · Zea mays (maize)Results differ

47 papers: 36 positive, 11 negative or no effect

35 papers in the same direction as this claim · 10 in the opposite direction · 1 reporting no difference from an alternative

  1. negative
    Removing each Mg of residue reduced grain yield by about 0.10 Mg per hectare.

    Corn and Soybean Yield Response to Crop Residue Management Under No‐Tillage Production Systems1 · 1986 · compared with residue removed

    Opposite direction

  2. no effect
    Corn yield depression at high pH was not improved by magnesium applications.

    Effect of pH on soil magnesium and its absorption by corn · 1980

    Opposite direction

  3. negative
    No Mg application was required for maximum grain yield in both years.

    Irrigated Corn Response to Soil‐Test Indices and Fertilizer Nitrogen, Phosphorous, Potassium, and Magnesium · 1988

    Opposite directionAbout lacking this nutrient, so it counts the other way round

  4. no effect
    Magnesium additions did not affect yields.

    Magnesium Deficiency and Corn Yield on Two Acid Indiana Soils · 1958

    Opposite direction

  5. no effect
    Magnesium application did not significantly affect corn yield.

    Effects of Potassium and Magnesium Applied for Corn Grown on an Irrigated Sandy Soil · 1985

    Opposite direction

  6. negative
    Maize yield decreased under long-term omission of P, K, and Mg.

    Sensitivity of Plant and Soil Indices in Evaluating the Long-Term Consequences of Soil Mining from Reserves of Phosphorus, Potassium, and Magnesium · 2012

    Opposite direction

  7. no effect
    Mg nutrition had no effect on plant dehydration rate, dry matter accumulation or grain yield under water deficit.

    Magnesium Nutrition and Grain Yield of Maize Having Low Water Potential1 · 1983

    Opposite direction

  8. no effect
    Magnesium dose did not significantly differentiate maize grain yield.

    The effect of soil supplementation with different forms of nitrogen fertilizer on modifi cation of generative yield in two different types of maize (Zea mays L.) hybrids · 2019

    Opposite direction

38 papers more in this group

See all 47 papers →

zinc atom · yield · Zea mays (maize)Results differ

441 papers: 391 positive, 50 negative or no effect

390 papers in the same direction as this claim · 47 in the opposite direction · 3 reporting no difference from an alternative

  1. negative
    Adding Zn to the intermediate Fe level accentuated Fe deficiency and depressed corn yield.

    Nutrient Balance Involving Phosphorus, Iron, and Zinc · 1965 · compared with intermediate Fe level

    Opposite direction

  2. negative
    Corn yield at zero zinc and 3.0 mM phosphorus was significantly lower than at 1.0 mM phosphorus.

    Potential for Phosphorus Toxicity in Zinc‐Stressed Corn and Potato · 1981 · compared with 1.0 m M P

    Opposite direction

  3. no effect
    Most foliar Zn applications had no grain-yield effect.

    Effect of Foliar Micronutrients (B, Mn, Fe, Zn) on Maize Grain Yield, Micronutrient Recovery, Uptake, and Partitioning · 2021

    Opposite direction

  4. negative
    In a pot experiment the highest Zn rate (250 ppm) slightly reduced corn yield.

    EFFECTS OF SOIL PROPERTIES AND AMENDMENTS ON THE AVAILABILITY OF ZINC IN SOILS · 1974

    Opposite direction

  5. negative
    Zn alone or P alone reduced aboveground dry matter and yield at harvest by 8-85% in LCV and FER soils relative to unfertilized plants

    Combining P and Zn fertilization to enhance yield and grain quality in maize grown on Mediterranean soils · 2021 · compared with unfertilized (control) plants

    Opposite direction

  6. no effect
    Maize grain yield did not respond to zinc application.

    Yield-limiting plant nutrients for maize production in northwest Ethiopia · 2022

    Opposite direction

  7. no effect
    Soil Zn did not affect maize yield at any Cd concentration.

    Cadmium‐zinc interaction in maize grown on sewer water irrigated soil · 1993

    Opposite direction

  8. negative
    Shoot and root dry matter yield depression under Zn stress was 78 to 95 and 72 to 94%, respectively, relative to 5 ppm supplemental Zn.

    Zinc Response in Corn as Influenced by Genetic Variability1 · 1976 · compared with 5 ppm supplemental Zn level

    Opposite direction

432 papers more in this group

See all 441 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.