Paper · 1979 · Journal of the American Society for Horticultural Science

Pecan Yield, Quality, Nutlet Set, and Spring Growth as a Response to Time of Fall Defoliation 1

Ray E. Worley

6
claims
11
verbatim quotes
45
citations
3
research areas
✓
Open access · cc-by-nc-nd

Abstract

Abstract Defoliation of pecan trees [ Carya illinoensis (Wang) K. Koch] prior to October 1 prevented nutlet formation the next year in 2 out of 3 years. September defoliation was most damaging to yield, October defoliation was less damaging, and defoliation on November 1 did not reduce yield. Early defoliation delayed bud break the next year and August defoliation reduced nut size. Percentage kernel was reduced when defoliation date moved from August 1 to September 15.

Abstract from the paper’s OpenAlex record; open copy licensed cc-by-nc-nd. Read at the source ↗

The text the model read, with the source record’s inline markup (italics, sub- and superscripts) rendered and its character entities decoded; quote offsets refer to the raw text.

Claims 6

Intervention effectobservedoriginal resultnegativemeasured

Claim · model-written summary

Defoliation before October 1 prevented pecan nutlet formation the following year in two of three years.

Taxon
pecan treesCarya illinoinensise0
Treatment
Defoliatione0
Outcome
nutlet formatione0
Direction
preventede0
Value
2 out of 3 yearse0
Qualifier
prior to October 1e0

Not reportedComparator

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

Carya illinoinensis
Carya illinoinensis · TaxonJames St. John · CC BY 2.0 · Wikimedia Commons ↗

Verbatim

e0

“Defoliation of pecan trees [ Carya illinoensis (Wang) K. Koch] prior to October 1 prevented nutlet formation the next year in 2 out of 3 years”

✓ located verbatim in the source · abstract, characters 9–151 · show in text ↑
Intervention effectobservedoriginal resultnegativemeasured

Claim · model-written summary

September defoliation damaged pecan yield more than October defoliation.

Treatment
September defoliatione0
Outcome
yielde0
Direction
most damaginge0
Comparator
October defoliatione0

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

Carya illinoinensis
Carya illinoinensis · TaxonJames St. John · CC BY 2.0 · Wikimedia Commons ↗

Verbatim

e0

“September defoliation was most damaging to yield, October defoliation was less damaging”

✓ located verbatim in the source · abstract, characters 153–240 · show in text ↑
t0

“Pecan Yield”

✓ located verbatim in the source · title, characters 0–11 · show in text ↑
Intervention effectobservedoriginal resultno effectmeasured

Claim · model-written summary

Defoliation on November 1 did not reduce pecan yield.

Treatment
defoliation on November 1e0
Outcome
yielde0
Direction
did not reducee0

Not reportedComparator

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

Carya illinoinensis
Carya illinoinensis · TaxonJames St. John · CC BY 2.0 · Wikimedia Commons ↗

Verbatim

e0

“defoliation on November 1 did not reduce yield”

✓ located verbatim in the source · abstract, characters 246–292 · show in text ↑
t0

“Pecan Yield”

✓ located verbatim in the source · title, characters 0–11 · show in text ↑
Intervention effectobservedoriginal resultnegativemeasured

Claim · model-written summary

Early defoliation delayed pecan bud break the following year.

Treatment
Early defoliatione0
Outcome
bud breake0
Direction
delayede0

Not reportedComparator

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

Carya illinoinensis
Carya illinoinensis · TaxonJames St. John · CC BY 2.0 · Wikimedia Commons ↗

Verbatim

e0

“Early defoliation delayed bud break the next year”

✓ located verbatim in the source · abstract, characters 294–343 · show in text ↑
t0

“Pecan Yield”

✓ located verbatim in the source · title, characters 0–11 · show in text ↑
Intervention effectobservedoriginal resultnegativemeasured

Claim · model-written summary

August defoliation reduced pecan nut size.

Treatment
August defoliatione0
Outcome
nut sizee0
Direction
reducede0

Not reportedComparator

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

Carya illinoinensis
Carya illinoinensis · TaxonJames St. John · CC BY 2.0 · Wikimedia Commons ↗

Verbatim

e0

“August defoliation reduced nut size”

✓ located verbatim in the source · abstract, characters 348–383 · show in text ↑
t0

“Pecan Yield”

✓ located verbatim in the source · title, characters 0–11 · show in text ↑
Associationobservedoriginal resultnegativemeasured

Claim · model-written summary

Pecan kernel percentage fell as defoliation moved from August 1 to September 15.

Treatment
defoliation datee0
Outcome
Percentage kernele0
Direction
reducede0
Qualifier
August 1 to September 15e0

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

Carya illinoinensis
Carya illinoinensis · TaxonJames St. John · CC BY 2.0 · Wikimedia Commons ↗

Verbatim

e0

“Percentage kernel was reduced when defoliation date moved from August 1 to September 15”

✓ located verbatim in the source · abstract, characters 385–472 · show in text ↑
t0

“Pecan Yield”

✓ located verbatim in the source · title, characters 0–11 · show in text ↑

pruning · growth · Carya illinoinensis (pecan)Results differ

28 papers: 17 positive, 11 negative or no effect

10 papers in the same direction as this paper · 17 in the opposite direction

  1. positive
  2. positive
  3. positive

24 papers more in this group

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pruning · yield · Carya illinoinensis (pecan)Results differ

29 papers: 18 positive, 11 negative or no effect

10 papers in the same direction as this paper · 18 in the opposite direction

  1. positive
  2. positive
  3. positive
    Wichita pecan trees under mechanized hedge pruning and topping produced 144% more nut yield than trees under orchard thinning.

    Hedge Pruning Pecan · 2004 · compared with an orchard treatment in which tree population density was reduced by tree thinning

    Opposite directionCites this paper

25 papers more in this group

See all 29 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.