Intervention effectmodel-written summary

P+K gave the lowest NDVI reading.

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 resultnegativemeasured

Claim · model-written summary

Taxon: MaizeZea mayst0
Treatment: P+Ke0
Outcome: NDVI readinge0
Direction: loweste0

Not reportedMaterialGeneCompoundOrgan / stageInteractorInteractor roleSecond interactorSecond interactor roleComparatorSettingValueQualifier

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

*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)

Intervention effect N+P+K+Ca+Mg+Zn+B+S gave the highest NDVI reading.
Intervention effect P+K gave the lowest dry biomass.
Intervention effect N+P+K+Ca+Mg+Zn+B+S gave the highest dry biomass.
Intervention effect P+K gave the lowest grain yields.
Intervention effect N+P+K+Ca+Mg+Zn+B+S gave the highest grain yields.
Intervention effect N produced a positive NDVI response of 56%.
Intervention effect P produced a positive NDVI response of 14%.
Intervention effect K produced a positive NDVI response of 15%.
Intervention effect combined Ca+Mg+Zn+B+S produced a positive NDVI response of 15%.
Intervention effect N produced a positive biomass response of 54%.
Intervention effect P produced a positive biomass response of 20%.
Intervention effect K produced a positive biomass response of 8%.
Intervention effect Ca+Mg+Zn+B+S produced a positive biomass response of 18%.
Method / resource GreenSeeker NDVI reading predicted grain yield in Embu with R2 0.23-0.53.
Method / resource aboveground dry biomass predicted grain yield in Embu with R2 0.30-0.61.
Method / resource GreenSeeker NDVI reading predicted grain yield in Kirinyaga with R2 0.31-0.64.
Method / resource aboveground dry biomass predicted grain yield in Kirinyaga with R2 0.30-0.50.
Method / resource Pooled data increased NDVI prediction strength to 67%.
Method / resource Pooled data increased biomass prediction strength to 58%.

Record rev-2b32da1cb1a2c6802b79f8f8fe7a5ae3243ee64d3ca989b00a53e0b0e3d6bcba · schema claims-v0.9 · position 1 in the model’s answer

potassium · growth · Zea mays (maize)Results differ

114 papers: 99 positive, 15 negative or no effect

15 papers in the same direction as this claim · 98 in the opposite direction

positive
Potassium increased corn proton release and root growth at critical pH.
Effect of Low Root Medium pH on Net Proton Release, Root Respiration, and Root Growth of Corn (Zea mays L.) and Broad Bean (Vicia faba L.) · 1992
Opposite direction
positive
Joint application of rock P and K materials with PDB and KDB increased maize shoot and root growth.
Impact of rock materials and biofertilizations on P and K availability for maize (Zea Maize) under calcareous soil conditions · 2011
Opposite direction
positive
Reduced potassium (75% CNK) doubled maize root biomass relative to control.
Characterization of a chitosan‐based sustained release nanofertilizer formulation used as a soil conditioner while simultaneously improving biomass production of Zea mays L. · 2020 · compared with control
Opposite direction
positive
leaf thickness was higher at higher K levels.
Cell Membrane Stability and Leaf Water Relations as Affected by Potassium Nutrition of Water-Stressed Maize · 1991
Opposite direction
positive
With NH4-N as the sole N source, high K levels promoted maize root growth.
Interaction of potassium with the form and amount of nitrogen nutrition on growth and nitrogen uptake of maize · 1992
Opposite direction
positive
Potassium increased corn growth in 6 sites.
Deep Banding Phosphorus and Potassium Fertilizers for Corn Managed with Ridge Tillage · 2001
Opposite direction
positive
The combined potassium and magnesium treatment gave better effects on root and shoot dry and fresh weight.
Influence of mycorrhizal fungi on growth, chlorophyll content, and potassium and magnesium uptake in maize · 2017
Opposite direction
positive
Integrated foliar potassium and zinc at 25 and 50 days enhanced maize growth traits.
Foliar Applied Potassium and Zinc Enhances Growth and Yield Performance of Maize under Rainfed Conditions · 2016
Opposite direction

105 papers more in this group

See all 114 papers →

phosphorus · growth · Zea mays (maize)Positive and negative results

306 papers: 252 positive, 54 negative or no effect

54 papers in the same direction as this claim · 251 in the opposite direction

positive
PSB inoculation gave the greatest efficiency in promoting maize growth compared with uninoculated plants in pots.
Phenotypic and genotypic characterization of phosphate solubilizing bacteria and their efficiency on the growth of maize · 2017 · compared with uninoculated plant
Opposite direction
positive
Bacterial inoculation with organic manures improved maize growth and phosphorus uptake relative to control and mineral phosphorus sources.
Coupling Phosphate-Solubilizing Bacteria with Phosphorus Supplements Improve Maize Phosphorus Acquisition and Growth under Lime Induced Salinity Stress · 2020 · compared with the control and soils with P applied from mineral sources
Opposite direction
positive
P deficiency significantly reduced maximum relative elemental growth rate.
The decrease in growth of phosphorus‐deficient maize leaves is related to a lower cell production · 2004
Opposite directionAbout lacking this nutrient, so it counts the other way round
positive
Joint application of rock P and K materials with PDB and KDB increased maize shoot and root growth.
Impact of rock materials and biofertilizations on P and K availability for maize (Zea Maize) under calcareous soil conditions · 2011
Opposite direction
positive
Phosphorus stratification stimulated root growth in conservation systems compared with the conventional system.
Influence of crop rotations and tillage systems on phosphorus and potassium stratification and root distribution in the soil profile · 1998 · compared with conventional one
Opposite direction
positive
Under heterogeneous phosphorus, maize shoot biomass was greater with faba bean than maize neighbors.
Neighbouring plants modify maize root foraging for phosphorus: coupling nutrients and neighbours for improved nutrient‐use efficiency · 2019 · compared with maize/maize system
Opposite direction
positive
Under low phosphorus, plants with 0.2 mm2 less LCA rooted 20 cm deeper than plants with high LCA in maize.
Reduced root cortical burden improves growth and grain yield under low phosphorus availability in maize · 2018 · compared with plants with high LCA
Opposite direction
positive
P deficiency reduced maize growth.
Phosphorus Limitation Improved Salt Tolerance in Maize Through Tissue Mass Density Increase, Osmolytes Accumulation, and Na+ Uptake Inhibition · 2019 · compared with sufficient P supply
Opposite directionAbout lacking this nutrient, so it counts the other way round

297 papers more in this group

See all 306 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

potassium · growth · Zea mays (maize)Results differ

phosphorus · growth · Zea mays (maize)Positive and negative results