Paper · 1990 · Plant Disease

The Effect of Cover Crops and Fertilization with Ammonium Nitrate on Corky Root of Lettuce

Ariena H. C. Van Bruggen

6
claims
8
verbatim quotes
17
citations
2
research areas
—
Not open access

Abstract

Rye planted as a winter crop slightly reduced the severity of corky root early in the growing season of a subsequent lettuce crop, but at harvest the suppressive effect was observed in only one of four lettuce crops. Lettuce yields were not affected by cover crop use. Side-dressing with ammonium nitrate increased corky root severity in most plots and reduced yield in all plots. There were no significant interactions between cover crops and nitrogen fertilization with respect to lettuce yield (...)

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Claims 6

Intervention effectobservedoriginal resultpositivemeasured

Claim · model-written summary

Winter rye slightly reduced early corky root severity in the subsequent lettuce crop.

Taxon
lettuceLactuca sativae0
Treatment
Rye planted as a winter crope0
Outcome
severity of corky roote0
Direction
reducede0
Qualifier
early in the growing seasone0

Not reportedComparator

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

Lactuca sativa
Lactuca sativa · Taxonen:User:Geographer · CC BY 1.0 · Wikimedia Commons ↗

Verbatim

e0

“Rye planted as a winter crop slightly reduced the severity of corky root early in the growing season of a subsequent lettuce crop”

✓ located verbatim in the source · abstract, characters 0–129 · show in text ↑
Intervention effectobservedoriginal resultpositivemeasured

Claim · model-written summary

At harvest, rye suppressed corky root in only one of four lettuce crops.

Taxon
lettuceLactuca sativae0
Treatment
Rye planted as a winter crope1
Outcome
corky roote1
Direction
suppressivee0
Value
one of four lettuce cropse0

Not reportedComparator

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

Lactuca sativa
Lactuca sativa · Taxonen:User:Geographer · CC BY 1.0 · Wikimedia Commons ↗

Verbatim

e0

“at harvest the suppressive effect was observed in only one of four lettuce crops”

✓ located verbatim in the source · abstract, characters 135–215 · show in text ↑
e1

“Rye planted as a winter crop slightly reduced the severity of corky root early in the growing season of a subsequent lettuce crop”

✓ located verbatim in the source · abstract, characters 0–129 · show in text ↑
Intervention effectobservedoriginal resultno effectmeasured

Claim · model-written summary

Cover crop use did not affect lettuce yield.

Taxon
LettuceLactuca sativae0
Treatment
cover crop usee0
Outcome
yieldse0
Direction
not affectede0

Not reportedComparator

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

Lactuca sativa
Lactuca sativa · Taxonen:User:Geographer · CC BY 1.0 · Wikimedia Commons ↗

Verbatim

e0

“Lettuce yields were not affected by cover crop use.”

✓ located verbatim in the source · abstract, characters 217–268 · show in text ↑
Intervention effectobservedoriginal resultnegativemeasured

Claim · model-written summary

Ammonium nitrate side dressing increased corky root severity in most plots.

Treatment
Side-dressing with ammonium nitratee0
Outcome
corky root severitye0
Direction
increasede0
Qualifier
most plotse0

Not reportedTaxonComparator

Verbatim

e0

“Side-dressing with ammonium nitrate increased corky root severity in most plots”

✓ located verbatim in the source · abstract, characters 269–348 · show in text ↑
Intervention effectobservedoriginal resultnegativemeasured

Claim · model-written summary

Ammonium nitrate side dressing reduced lettuce yield in all plots.

Taxon
LettuceLactuca sativae1
Treatment
Side-dressing with ammonium nitratee0
Outcome
yielde0
Direction
reducede0
Qualifier
all plotse0

Not reportedComparator

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

Lactuca sativa
Lactuca sativa · Taxonen:User:Geographer · CC BY 1.0 · Wikimedia Commons ↗

Verbatim

e0

“Side-dressing with ammonium nitrate increased corky root severity in most plots and reduced yield in all plots.”

✓ located verbatim in the source · abstract, characters 269–380 · show in text ↑
e1

“Lettuce yields were not affected by cover crop use.”

✓ located verbatim in the source · abstract, characters 217–268 · show in text ↑
Associationobservedoriginal resultno effectnot significant (as stated)measured

Claim · model-written summary

Cover crop and nitrogen fertilization did not interact significantly for lettuce yield.

Taxon
lettuceLactuca sativae0
Treatment
cover crops and nitrogen fertilizatione0
Outcome
yielde0
Direction
no significant interactionse0

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

Lactuca sativa
Lactuca sativa · Taxonen:User:Geographer · CC BY 1.0 · Wikimedia Commons ↗

Verbatim

e0

“There were no significant interactions between cover crops and nitrogen fertilization with respect to lettuce yield”

✓ located verbatim in the source · abstract, characters 381–496 · show in text ↑

ammonium nitrate · yield · Lactuca sativa (garden lettuce)Positive and negative results

4 papers: 2 positive, 2 negative or no effect

1 paper in the same direction as this paper · 2 in the opposite direction

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

cover crop · yield · Lactuca sativa (garden lettuce)Results differ

8 papers: 4 positive, 4 negative or no effect

3 papers in the same direction as this paper · 4 in the opposite direction

  1. positive
  2. positive
  3. positive

4 papers more in this group

See all 8 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.