Intervention effectmodel-written summary

Broadcast fertilizer increased grain yield by 4·0 cwt. per acre.

A claim from The Placement of fertilizers: II. Cereals · 1944

Intervention effectobservedoriginal resultpositivemeasured

Claim · model-written summary

Broadcast fertilizer increased grain yield by 4·0 cwt. per acre.

Taxon
barley and oatsAvena sativaHordeum vulgaree7
Treatment
broadcast fertilizere0
Outcome
yields of graine0
Direction
increasede0
Value
4·0e0

Not reportedMaterialGeneCompoundOrgan / stageInteractorInteractor roleSecond interactorSecond interactor roleComparatorSettingQualifier

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

Avena sativa
Avena sativa · TaxonSendelbach ( talk ) · CC BY-SA 3.0 · Wikimedia Commons ↗
Hordeum vulgare
Hordeum vulgare · TaxonJackyM59 · CC BY-SA 4.0 · Wikimedia Commons ↗

Verbatim

e7

“spring-sown barley and oats”

✓ located verbatim in the source · abstract, characters 58–85
e0

“broadcast fertilizer increased the yields of grain and straw by 4·0 and 6·3 cwt. per acre respectively”

✓ located verbatim in the source · abstract, characters 588–690

Title

The Placement of fertilizers: II. Cereals

A. H. Lewis; A. G. Strickland The Journal of Agricultural Science 1944. doi:10.1017/s0021859600019742

Other claims from this paper (13)

Record rev-d944fa5ae4493ed2d209d77c7b22bc69216aef31c3572559b5d2681ba340a63d · schema claims-v0.9 · position 5 in the model’s answer

transplanting · yield · Avena sativa (oats)Positive and negative results

6 papers: 2 positive, 4 negative or no effect

1 paper in the same direction as this claim · 4 in the opposite direction

  1. no effect
  2. negative
  3. negative
  4. negative
  5. positive
See all 6 papers →

transplanting · yield · Hordeum vulgare (barley)Positive and negative results

31 papers: 17 positive, 14 negative or no effect

16 papers in the same direction as this claim · 14 in the opposite direction

  1. negative
  2. no effect
  3. negative
  4. negative
  5. no effect
  6. negative
  7. negative
  8. negative

22 papers more in this group

See all 31 papers →

fertilization · yield · Avena sativa (oats)Positive and negative results

160 papers: 143 positive, 17 negative or no effect

142 papers in the same direction as this claim · 15 in the opposite direction · 2 reporting no difference from an alternative

  1. no effect
  2. negative
  3. no effect
  4. no effect
  5. negative
  6. no effect
  7. negative
  8. negative

151 papers more in this group

See all 160 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.