Intervention effectmodel-written summary

Adding 80 kg K/ha to 110 kg N/ha raised sorghum panicle weight to 28.8 g.

A claim from Preliminary results of a two-year sorghum trial, on a grumusol, Waigani, Papua New Guinea. · 1971

Intervention effectobservedoriginal resultpositivemeasured

Claim · model-written summary

Adding 80 kg K/ha to 110 kg N/ha raised sorghum panicle weight to 28.8 g.

Taxon
sorghumSorghume1
Treatment
80 kg Ke1
Outcome
Panicle weightse2
Direction
increaseinferrede2
Value
28.8e2
Comparator
110 kg N/ha alonee1

Not reportedMaterialGeneCompoundOrgan / stageInteractorInteractor roleSecond interactorSecond interactor roleSettingQualifier

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

Sorghum
Sorghum · Taxon · picture of the genus (one of its species)Evelyn Simak · CC BY-SA 2.0 · Wikimedia Commons ↗

Verbatim

e1

“In a pot trial, sorghum cv. Texas 608 was given either (a) no fertilizer, or (b) 110 kg N/ha alone or in combination with (c) 80 kg K, (d) 34 kg P or (e) 34 kg P + 80 kg K/ha”

✓ located verbatim in the source · abstract, characters 0–174
e2

“Panicle weights were: (a) 9.5, (b) 16.3, (c) 28.8, (d) 21.3 and (e) 10 g”

✓ located verbatim in the source · abstract, characters 176–248

Title

Preliminary results of a two-year sorghum trial, on a grumusol, Waigani, Papua New Guinea.

R. L. Parfitt; D.P. Drover 1971

Other claims from this paper (10)

Record rev-ee2192fac98e04cb22d816085099c80b1668549456ca98e1e250b6cebee99f18 · schema claims-v0.9 · position 2 in the model’s answer

potassium · yield · SorghumResults differ

41 papers: 24 positive, 17 negative or no effect

23 papers in the same direction as this claim · 16 in the opposite direction · 1 reporting no difference from an alternative

  1. no effect
    Potassium application did not affect dry matter yields in either year.

    Potassium Management for Brown Midrib Sorghum × Sudangrass as Replacement for Corn Silage in the North‐eastern USA · 2005

    Opposite direction

  2. no effect
    K application did not significantly affect sorghum yield.

    NPK requirement of hybrid jowar (CSH-1) in kharif season under rainfed condition · 1976

    Opposite direction

  3. no effect
    Potassium application at 25-50 kg K2O/ha increased grain yield of hybrid sorghum CSH-1 compared with no P or K, not significantly.

    Response of hybrid sorghum (Sorghum vulgare Pers.) to N, P and K fertilization under rainfed condition. · 1970 · compared with plots given no P or K

    Opposite direction

  4. no effect
    Potassium fertilization had no effect on sorghum yield.

    Long-Term Nitrogen, Phosphorus, and Potassium Fertilization of Irrigated Grain Sorghum · 2020

    Opposite direction

  5. no effect
    Potassium application did not affect sorghum yield during the study.

    Nitrogen and Phosphorus Fertilization of Irrigated Grain Sorghum · 2016

    Opposite direction

  6. no effect
    Omitting potassium did not significantly affect grain and biomass yields.

    Effects of nutrient omission and landscape positions on grain sorghum production in northern Ethiopia · 2025

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

  7. no effect
    K had no significant effect on sorghum grain yield.

    Rationalising fertilizer rates for sorghum. II. Optimising the dose with relevance to the soil test values · 1980

    Opposite direction

  8. no effect
    Potassium application had no effect on sorghum yield throughout the study.

    Irrigated Grain Sorghum Response to Long-Term Nitrogen and Phosphorus Fertilization · 2017

    Opposite direction

32 papers more in this group

See all 41 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.