Paper · 1988 · Journal of the American Society for Horticultural Science

Influence of Pruning and Urea Sprays on Growth and Fruiting of Spur-bound ‘Delicious’ Apple Trees

David C. Ferree; C.G. Forshey

18
claims
36
verbatim quotes
10
citations
3
research areas
✓
Open access · cc-by-nc-nd

Abstract

Abstract Spur quality and leaf nutritional levels were determined in various canopy sections of mature spur-bound ‘Delicious’-type apple ( Malus domestica Borkh.) trees and then various pruning and foliar urea treatments were applied to alter growth and improve fruit size. Fruit size declined from the top to the bottom of the canopy of mature spur-bound ‘Starkrimson Delicious’ trees with a similar pattern in the following criteria: leaf area/spur, spur specific leaf weight, and spur bud diameter. Spur leaf area was higher in the top center and east sections than in the top south. Spur bud diameter in the bottom third of the canopy was highest in the north and east sections, lowest in the central section, and intermediate in the south and west sections. Concentrations of leaf Mn, Zn, B, Al, and Na tended to increase from the top to the bottom of the canopy. Four urea sprays (6 g urea/liter) during the cell division period of fruit growth had little influence on spur quality, but fruit weight was increased 3 successive years. Spur pruning of 25-year-old ‘Starkrimson Delicious’ trees was not sufficient to increase shoot growth or improve spur quality, but heading back into 2-year-old wood plus spur pruning increased shoot number by 38%. Spur and heading-back pruning increased the number of shoots and total shoot leaf area of 13-year-old ‘Red Chief Delicious’ trees, and the combination of both pruning types led to the greatest increase. Heading-back of the younger trees increased leaf area of both shoots and spurs and spur pruning also increased leaf area/spur. Heading-back pruning increased average fruit weight, and the increase was positively correlated with total leaf area, shoot leaf area, and number of shoot leaves/mm of branch circumference.

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 18

Observationobservedoriginal resultmeasured

Claim · model-written summary

Fruit size declined from the top to the bottom of the canopy of mature Starkrimson Delicious apple trees.

Taxon
Malus domesticaMalus domesticae0
Material
Starkrimson Deliciouse1
Organ / stage
top to the bottom of the canopye1
Outcome
fruit sizee1
Direction
declinede1

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

Malus domestica
Malus domestica · TaxonW.carter · CC0 · Wikimedia Commons ↗

Verbatim

e0

“Spur quality and leaf nutritional levels were determined in various canopy sections of mature spur-bound ‘Delicious’-type apple ( Malus domestica Borkh.) trees”

✓ located verbatim in the source · abstract, characters 9–168 · show in text ↑
e1

“Fruit size declined from the top to the bottom of the canopy of mature spur-bound ‘Starkrimson Delicious’ trees with a similar pattern in the following criteria: leaf area/spur, spur specific leaf weight, and spur bud diameter”

✓ located verbatim in the source · abstract, characters 274–500 · show in text ↑
Observationobservedoriginal resultmeasured

Claim · model-written summary

Leaf area per spur, spur specific leaf weight and spur bud diameter showed a similar pattern of decline from the top to the bottom of the canopy.

Taxon
Malus domesticaMalus domesticae0
Material
Starkrimson Deliciouse1
Organ / stage
top to the bottom of the canopye1
Outcome
leaf area/spur, spur specific leaf weight, and spur bud diametere1
Direction
similar patterne1

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

Malus domestica
Malus domestica · TaxonW.carter · CC0 · Wikimedia Commons ↗

Verbatim

e0

“Spur quality and leaf nutritional levels were determined in various canopy sections of mature spur-bound ‘Delicious’-type apple ( Malus domestica Borkh.) trees”

✓ located verbatim in the source · abstract, characters 9–168 · show in text ↑
e1

“Fruit size declined from the top to the bottom of the canopy of mature spur-bound ‘Starkrimson Delicious’ trees with a similar pattern in the following criteria: leaf area/spur, spur specific leaf weight, and spur bud diameter”

✓ located verbatim in the source · abstract, characters 274–500 · show in text ↑
Observationobservedoriginal resultmeasured

Claim · model-written summary

Spur leaf area was higher in the top center and east sections than in the top south section.

Taxon
Malus domesticaMalus domesticae0
Organ / stage
top center and east sectionse2
Outcome
Spur leaf areae2
Direction
highere2
Comparator
top southe2

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

Malus domestica
Malus domestica · TaxonW.carter · CC0 · Wikimedia Commons ↗

Verbatim

e0

“Spur quality and leaf nutritional levels were determined in various canopy sections of mature spur-bound ‘Delicious’-type apple ( Malus domestica Borkh.) trees”

✓ located verbatim in the source · abstract, characters 9–168 · show in text ↑
e2

“Spur leaf area was higher in the top center and east sections than in the top south”

✓ located verbatim in the source · abstract, characters 502–585 · show in text ↑
Observationobservedoriginal resultmeasured

Claim · model-written summary

Spur bud diameter in the bottom third of the canopy was highest in the north and east sections.

Taxon
Malus domesticaMalus domesticae0
Organ / stage
bottom third of the canopye3
Outcome
Spur bud diametere3
Direction
higheste3
Qualifier
north and east sectionse3

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

Malus domestica
Malus domestica · TaxonW.carter · CC0 · Wikimedia Commons ↗

Verbatim

e0

“Spur quality and leaf nutritional levels were determined in various canopy sections of mature spur-bound ‘Delicious’-type apple ( Malus domestica Borkh.) trees”

✓ located verbatim in the source · abstract, characters 9–168 · show in text ↑
e3

“Spur bud diameter in the bottom third of the canopy was highest in the north and east sections, lowest in the central section, and intermediate in the south and west sections”

✓ located verbatim in the source · abstract, characters 587–761 · show in text ↑
Observationobservedoriginal resultmeasured

Claim · model-written summary

Spur bud diameter in the bottom third of the canopy was lowest in the central section.

Taxon
Malus domesticaMalus domesticae0
Organ / stage
bottom third of the canopye3
Outcome
Spur bud diametere3
Direction
loweste3
Qualifier
central sectione3

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

Malus domestica
Malus domestica · TaxonW.carter · CC0 · Wikimedia Commons ↗

Verbatim

e0

“Spur quality and leaf nutritional levels were determined in various canopy sections of mature spur-bound ‘Delicious’-type apple ( Malus domestica Borkh.) trees”

✓ located verbatim in the source · abstract, characters 9–168 · show in text ↑
e3

“Spur bud diameter in the bottom third of the canopy was highest in the north and east sections, lowest in the central section, and intermediate in the south and west sections”

✓ located verbatim in the source · abstract, characters 587–761 · show in text ↑
Observationobservedoriginal resultmeasured

Claim · model-written summary

Spur bud diameter in the bottom third of the canopy was intermediate in the south and west sections.

Taxon
Malus domesticaMalus domesticae0
Organ / stage
bottom third of the canopye3
Outcome
Spur bud diametere3
Direction
intermediatee3
Qualifier
south and west sectionse3

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

Malus domestica
Malus domestica · TaxonW.carter · CC0 · Wikimedia Commons ↗

Verbatim

e0

“Spur quality and leaf nutritional levels were determined in various canopy sections of mature spur-bound ‘Delicious’-type apple ( Malus domestica Borkh.) trees”

✓ located verbatim in the source · abstract, characters 9–168 · show in text ↑
e3

“Spur bud diameter in the bottom third of the canopy was highest in the north and east sections, lowest in the central section, and intermediate in the south and west sections”

✓ located verbatim in the source · abstract, characters 587–761 · show in text ↑
Observationobservedoriginal resultmeasured

Claim · model-written summary

Leaf Mn, Zn and B concentrations tended to increase from the top to the bottom of the canopy.

Taxon
Malus domesticaMalus domesticae0
Organ / stage
top to the bottom of the canopye4
Outcome
Mn, Zn, Be4
Direction
tended to increasee4

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

Malus domestica
Malus domestica · TaxonW.carter · CC0 · Wikimedia Commons ↗

Verbatim

e0

“Spur quality and leaf nutritional levels were determined in various canopy sections of mature spur-bound ‘Delicious’-type apple ( Malus domestica Borkh.) trees”

✓ located verbatim in the source · abstract, characters 9–168 · show in text ↑
e4

“Concentrations of leaf Mn, Zn, B, Al, and Na tended to increase from the top to the bottom of the canopy”

✓ located verbatim in the source · abstract, characters 763–867 · show in text ↑
Observationobservedoriginal resultmeasured

Claim · model-written summary

Leaf Al and Na concentrations tended to increase from the top to the bottom of the canopy.

Taxon
Malus domesticaMalus domesticae0
Organ / stage
top to the bottom of the canopye4
Outcome
Al, and Nae4
Direction
tended to increasee4

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

Malus domestica
Malus domestica · TaxonW.carter · CC0 · Wikimedia Commons ↗

Verbatim

e0

“Spur quality and leaf nutritional levels were determined in various canopy sections of mature spur-bound ‘Delicious’-type apple ( Malus domestica Borkh.) trees”

✓ located verbatim in the source · abstract, characters 9–168 · show in text ↑
e4

“Concentrations of leaf Mn, Zn, B, Al, and Na tended to increase from the top to the bottom of the canopy”

✓ located verbatim in the source · abstract, characters 763–867 · show in text ↑
Intervention effectobservedoriginal resultno effectmeasured

Claim · model-written summary

Four urea sprays during the cell division period of fruit growth had little influence on spur quality.

Taxon
Malus domesticaMalus domesticae0
Treatment
Four urea sprays (6 g urea/liter)e5
Outcome
spur qualitye5
Direction
no_changeinferrede5

Not reportedComparator

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

Malus domestica
Malus domestica · TaxonW.carter · CC0 · Wikimedia Commons ↗

Verbatim

e0

“Spur quality and leaf nutritional levels were determined in various canopy sections of mature spur-bound ‘Delicious’-type apple ( Malus domestica Borkh.) trees”

✓ located verbatim in the source · abstract, characters 9–168 · show in text ↑
e5

“Four urea sprays (6 g urea/liter) during the cell division period of fruit growth had little influence on spur quality, but fruit weight was increased 3 successive years”

✓ located verbatim in the source · abstract, characters 869–1038 · show in text ↑
Intervention effectobservedoriginal resultpositivemeasured

Claim · model-written summary

Four urea sprays increased fruit weight over three successive years.

Taxon
Malus domesticaMalus domesticae0
Treatment
Four urea sprays (6 g urea/liter)e5
Outcome
fruit weighte5
Direction
increasede5
Qualifier
3 successive yearse5

Not reportedComparator

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

Malus domestica
Malus domestica · TaxonW.carter · CC0 · Wikimedia Commons ↗

Verbatim

e0

“Spur quality and leaf nutritional levels were determined in various canopy sections of mature spur-bound ‘Delicious’-type apple ( Malus domestica Borkh.) trees”

✓ located verbatim in the source · abstract, characters 9–168 · show in text ↑
e5

“Four urea sprays (6 g urea/liter) during the cell division period of fruit growth had little influence on spur quality, but fruit weight was increased 3 successive years”

✓ located verbatim in the source · abstract, characters 869–1038 · show in text ↑
Intervention effectobservedoriginal resultno effectmeasured

Claim · model-written summary

Spur pruning was not sufficient to increase shoot growth or improve spur quality in 25-year-old Starkrimson Delicious trees.

Taxon
Malus domesticaMalus domesticae0
Material
Starkrimson Deliciouse6
Treatment
Spur pruninge6
Outcome
shoot growth or improve spur qualitye6
Direction
not sufficient to increasee6

Not reportedComparator

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

Malus domestica
Malus domestica · TaxonW.carter · CC0 · Wikimedia Commons ↗

Verbatim

e0

“Spur quality and leaf nutritional levels were determined in various canopy sections of mature spur-bound ‘Delicious’-type apple ( Malus domestica Borkh.) trees”

✓ located verbatim in the source · abstract, characters 9–168 · show in text ↑
e6

“Spur pruning of 25-year-old ‘Starkrimson Delicious’ trees was not sufficient to increase shoot growth or improve spur quality”

✓ located verbatim in the source · abstract, characters 1040–1165 · show in text ↑
Intervention effectobservedoriginal resultpositivemeasured

Claim · model-written summary

Heading back into 2-year-old wood plus spur pruning increased shoot number by 38%.

Taxon
Malus domesticaMalus domesticae0
Treatment
heading back into 2-year-old wood plus spur pruninge7
Outcome
shoot numbere7
Direction
increasede7
Value
38%e7

Not reportedComparator

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

Malus domestica
Malus domestica · TaxonW.carter · CC0 · Wikimedia Commons ↗

Verbatim

e0

“Spur quality and leaf nutritional levels were determined in various canopy sections of mature spur-bound ‘Delicious’-type apple ( Malus domestica Borkh.) trees”

✓ located verbatim in the source · abstract, characters 9–168 · show in text ↑
e7

“heading back into 2-year-old wood plus spur pruning increased shoot number by 38%”

✓ located verbatim in the source · abstract, characters 1171–1252 · show in text ↑
Intervention effectobservedoriginal resultpositivemeasured

Claim · model-written summary

Spur and heading-back pruning increased the number of shoots and total shoot leaf area of Red Chief Delicious trees.

Taxon
Malus domesticaMalus domesticae0
Material
Red Chief Deliciouse1
Treatment
Spur and heading-back pruninge1
Outcome
number of shoots and total shoot leaf areae1
Direction
increasede1

Not reportedComparator

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

Malus domestica
Malus domestica · TaxonW.carter · CC0 · Wikimedia Commons ↗

Verbatim

e0

“Spur quality and leaf nutritional levels were determined in various canopy sections of mature spur-bound ‘Delicious’-type apple ( Malus domestica Borkh.) trees”

✓ located verbatim in the source · abstract, characters 9–168 · show in text ↑
e1

“Spur and heading-back pruning increased the number of shoots and total shoot leaf area of 13-year-old ‘Red Chief Delicious’ trees, and the combination of both pruning types led to the greatest increase”

✓ located verbatim in the source · abstract, characters 1254–1455 · show in text ↑
Intervention effectobservedoriginal resultpositivemeasured

Claim · model-written summary

The combination of spur and heading-back pruning gave the greatest increase in shoot number and total shoot leaf area of Red Chief Delicious trees.

Taxon
Malus domesticaMalus domesticae0
Material
Red Chief Deliciouse1
Treatment
the combination of both pruning typese1
Outcome
number of shoots and total shoot leaf areae1
Direction
greatest increasee1

Not reportedComparator

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

Malus domestica
Malus domestica · TaxonW.carter · CC0 · Wikimedia Commons ↗

Verbatim

e0

“Spur quality and leaf nutritional levels were determined in various canopy sections of mature spur-bound ‘Delicious’-type apple ( Malus domestica Borkh.) trees”

✓ located verbatim in the source · abstract, characters 9–168 · show in text ↑
e1

“Spur and heading-back pruning increased the number of shoots and total shoot leaf area of 13-year-old ‘Red Chief Delicious’ trees, and the combination of both pruning types led to the greatest increase”

✓ located verbatim in the source · abstract, characters 1254–1455 · show in text ↑
Intervention effectobservedoriginal resultpositivemeasured

Claim · model-written summary

Heading-back increased leaf area of both shoots and spurs of younger Delicious trees.

Taxon
Malus domesticaMalus domesticae0
Material
younger treese1
Treatment
Heading-backe1
Outcome
leaf area of both shoots and spurse1
Direction
increasede1

Not reportedComparator

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

Malus domestica
Malus domestica · TaxonW.carter · CC0 · Wikimedia Commons ↗

Verbatim

e0

“Spur quality and leaf nutritional levels were determined in various canopy sections of mature spur-bound ‘Delicious’-type apple ( Malus domestica Borkh.) trees”

✓ located verbatim in the source · abstract, characters 9–168 · show in text ↑
e1

“Heading-back of the younger trees increased leaf area of both shoots and spurs and spur pruning also increased leaf area/spur”

✓ located verbatim in the source · abstract, characters 1457–1582 · show in text ↑
Intervention effectobservedoriginal resultpositivemeasured

Claim · model-written summary

Spur pruning increased leaf area per spur.

Taxon
Malus domesticaMalus domesticae0
Treatment
spur pruninge1
Outcome
leaf area/spure1
Direction
increasede1

Not reportedComparator

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

Malus domestica
Malus domestica · TaxonW.carter · CC0 · Wikimedia Commons ↗

Verbatim

e0

“Spur quality and leaf nutritional levels were determined in various canopy sections of mature spur-bound ‘Delicious’-type apple ( Malus domestica Borkh.) trees”

✓ located verbatim in the source · abstract, characters 9–168 · show in text ↑
e1

“Heading-back of the younger trees increased leaf area of both shoots and spurs and spur pruning also increased leaf area/spur”

✓ located verbatim in the source · abstract, characters 1457–1582 · show in text ↑
Intervention effectobservedoriginal resultpositivemeasured

Claim · model-written summary

Heading-back pruning increased average fruit weight.

Taxon
Malus domesticaMalus domesticae0
Treatment
Heading-back pruninge1
Outcome
average fruit weighte1
Direction
increasede1

Not reportedComparator

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

Malus domestica
Malus domestica · TaxonW.carter · CC0 · Wikimedia Commons ↗

Verbatim

e0

“Spur quality and leaf nutritional levels were determined in various canopy sections of mature spur-bound ‘Delicious’-type apple ( Malus domestica Borkh.) trees”

✓ located verbatim in the source · abstract, characters 9–168 · show in text ↑
e1

“Heading-back pruning increased average fruit weight, and the increase was positively correlated with total leaf area, shoot leaf area, and number of shoot leaves/mm of branch circumference”

✓ located verbatim in the source · abstract, characters 1584–1772 · show in text ↑
Associationobservedoriginal resultpositivemeasured

Claim · model-written summary

The heading-back-pruning increase in fruit weight was positively correlated with total leaf area, shoot leaf area and number of shoot leaves per mm of branch circumference.

Taxon
Malus domesticaMalus domesticae0
Treatment
Heading-back pruninge1
Outcome
total leaf area, shoot leaf area, and number of shoot leaves/mm of branch circumferencee1
Direction
positively correlatede1

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

Malus domestica
Malus domestica · TaxonW.carter · CC0 · Wikimedia Commons ↗

Verbatim

e0

“Spur quality and leaf nutritional levels were determined in various canopy sections of mature spur-bound ‘Delicious’-type apple ( Malus domestica Borkh.) trees”

✓ located verbatim in the source · abstract, characters 9–168 · show in text ↑
e1

“Heading-back pruning increased average fruit weight, and the increase was positively correlated with total leaf area, shoot leaf area, and number of shoot leaves/mm of branch circumference”

✓ located verbatim in the source · abstract, characters 1584–1772 · show in text ↑

nitrogen · yield · Malus domestica (apple)Results differ

69 papers: 52 positive, 17 negative or no effect

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

  1. no effect
  2. negative
  3. no effect

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nitrogen · quality: general · Malus domestica (apple)Positive and negative results

8 papers: 5 positive, 3 negative or no effect

2 papers in the same direction as this paper · 5 in the opposite direction

  1. positive
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pruning · quality: general · Malus domestica (apple)Positive and negative results

12 papers: 5 positive, 7 negative or no effect

6 papers in the same direction as this paper · 5 in the opposite direction

  1. positive
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application · quality: general · Malus domestica (apple)Positive and negative results

21 papers: 11 positive, 10 negative or no effect

9 papers in the same direction as this paper · 11 in the opposite direction

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pruning · growth · Malus domestica (apple)Positive and negative results

106 papers: 58 positive, 48 negative or no effect

57 papers in the same direction as this paper · 47 in the opposite direction · 1 reporting no difference from an alternative

  1. negative
  2. positive
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application · yield · Malus domestica (apple)Positive and negative results

141 papers: 107 positive, 34 negative or no effect

106 papers in the same direction as this paper · 32 in the opposite direction · 2 reporting no difference from an alternative

  1. negative
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pruning · yield · Malus domestica (apple)Positive and negative results

147 papers: 100 positive, 47 negative or no effect

99 papers in the same direction as this paper · 47 in the opposite direction

  1. negative
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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.