Paper · 1985 · Journal of Horticultural Science

The effects of plant density on the shape, size, uniformity, soluble solids content and yield of onions suitable for pickling

D.J. McGeary

8
claims
17
verbatim quotes
21
citations
1
research areas
—
Not open access

Abstract

SummaryOnion seed cv White Spanish was hand-sown in a square arrangement at 178, 400, 625, 816, 1 111 and 1600 plants m−2. Increases in plant density resulted in reductions in plant size, mean bulb weight, plant fresh and dry weights, number of leaves, cumulative leaf length and time to maturity, but did not affect soluble solids content, the bulb ratio or the percentage dry matter per plant. Density had no effect on bulb uniformity but could be used to determine the distribution of size grades within the crop. Total and pickling-bulb yields gave overturning type relationships with plant density and were highest at 400 and 625 plants m−2 respectively. The practical implications of these results are discussed.

Abstract from the paper’s OpenAlex record, shown for indexing and research. Copyright remains with the authors or the publisher. 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 8

Intervention effectobservedoriginal resultnegativemeasured

Claim · model-written summary

Increasing onion density reduced plant size, mean bulb weight, and fresh weight.

Taxon
OnionAllium cepae1
Material
White Spanishe1
Treatment
Increases in plant densitye0
Outcome
plant size, mean bulb weight, plant freshe0
Direction
reductionse0

Not reportedComparator

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

Allium cepa
Allium cepa · TaxonMehdi · CC BY-SA 3.0 · Wikimedia Commons ↗

Verbatim

e0

“Increases in plant density resulted in reductions in plant size, mean bulb weight, plant fresh and dry weights, number of leaves, cumulative leaf length and time to maturity”

✓ located verbatim in the source · abstract, characters 123–296 · show in text ↑
e1

“Onion seed cv White Spanish”

✓ located verbatim in the source · abstract, characters 7–34 · show in text ↑
Intervention effectobservedoriginal resultnegativemeasured

Claim · model-written summary

Increasing onion density reduced dry weight, leaf number, and cumulative leaf length.

Taxon
OnionAllium cepae1
Material
White Spanishe1
Treatment
Increases in plant densitye0
Outcome
dry weights, number of leaves, cumulative leaf lengthe0
Direction
reductionse0

Not reportedComparator

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

Allium cepa
Allium cepa · TaxonMehdi · CC BY-SA 3.0 · Wikimedia Commons ↗

Verbatim

e0

“Increases in plant density resulted in reductions in plant size, mean bulb weight, plant fresh and dry weights, number of leaves, cumulative leaf length and time to maturity”

✓ located verbatim in the source · abstract, characters 123–296 · show in text ↑
e1

“Onion seed cv White Spanish”

✓ located verbatim in the source · abstract, characters 7–34 · show in text ↑
Intervention effectobservedoriginal resultnegativemeasured

Claim · model-written summary

Increasing onion density shortened time to maturity.

Taxon
OnionAllium cepae1
Material
White Spanishe1
Treatment
Increases in plant densitye0
Outcome
time to maturitye0
Direction
reductionse0

Not reportedComparator

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

Allium cepa
Allium cepa · TaxonMehdi · CC BY-SA 3.0 · Wikimedia Commons ↗

Verbatim

e0

“Increases in plant density resulted in reductions in plant size, mean bulb weight, plant fresh and dry weights, number of leaves, cumulative leaf length and time to maturity”

✓ located verbatim in the source · abstract, characters 123–296 · show in text ↑
e1

“Onion seed cv White Spanish”

✓ located verbatim in the source · abstract, characters 7–34 · show in text ↑
Intervention effectobservedoriginal resultno effectmeasured

Claim · model-written summary

Plant density did not affect onion soluble solids, bulb ratio, or dry matter percentage.

Taxon
OnionAllium cepae2
Material
White Spanishe2
Treatment
plant densitye1
Outcome
soluble solids content, the bulb ratio or the percentage dry matter per plante0
Direction
did not affecte0

Not reportedComparator

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

Allium cepa
Allium cepa · TaxonMehdi · CC BY-SA 3.0 · Wikimedia Commons ↗

Verbatim

e0

“but did not affect soluble solids content, the bulb ratio or the percentage dry matter per plant.”

✓ located verbatim in the source · abstract, characters 298–395 · show in text ↑
e1

“Increases in plant density”

✓ located verbatim in the source · abstract, characters 123–149 · show in text ↑
e2

“Onion seed cv White Spanish”

✓ located verbatim in the source · abstract, characters 7–34 · show in text ↑
Intervention effectobservedoriginal resultno effectmeasured

Claim · model-written summary

Plant density did not affect onion bulb uniformity.

Taxon
OnionAllium cepae1
Treatment
Densitye0
Outcome
bulb uniformitye0
Direction
no effecte0

Not reportedComparator

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

Allium cepa
Allium cepa · TaxonMehdi · CC BY-SA 3.0 · Wikimedia Commons ↗

Verbatim

e0

“Density had no effect on bulb uniformity”

✓ located verbatim in the source · abstract, characters 396–436 · show in text ↑
e1

“Onion seed cv White Spanish”

✓ located verbatim in the source · abstract, characters 7–34 · show in text ↑
Intervention effectobservedoriginal resultmixedmeasured

Claim · model-written summary

Plant density determined the distribution of onion bulb size grades.

Taxon
OnionAllium cepae1
Treatment
Densitye0
Outcome
distribution of size gradese0

Not reportedComparatorDirection

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

Allium cepa
Allium cepa · TaxonMehdi · CC BY-SA 3.0 · Wikimedia Commons ↗

Verbatim

e0

“Density had no effect on bulb uniformity but could be used to determine the distribution of size grades within the crop.”

✓ located verbatim in the source · abstract, characters 396–516 · show in text ↑
e1

“Onion seed cv White Spanish”

✓ located verbatim in the source · abstract, characters 7–34 · show in text ↑
Associationobservedoriginal resultmixedmeasured

Claim · model-written summary

Total onion yield had an overturning relationship with density and peaked at 400 plants m−2.

Taxon
OnionAllium cepae1
Treatment
plant densitye0
Outcome
Totale0
Direction
higheste0
Value
400e0

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

Allium cepa
Allium cepa · TaxonMehdi · CC BY-SA 3.0 · Wikimedia Commons ↗

Verbatim

e0

“Total and pickling-bulb yields gave overturning type relationships with plant density and were highest at 400 and 625 plants m−2 respectively.”

✓ located verbatim in the source · abstract, characters 517–659 · show in text ↑
e1

“Onion seed cv White Spanish”

✓ located verbatim in the source · abstract, characters 7–34 · show in text ↑
Associationobservedoriginal resultmixedmeasured

Claim · model-written summary

Pickling-bulb yield had an overturning relationship with density and peaked at 625 plants m−2.

Taxon
OnionAllium cepae1
Treatment
plant densitye0
Outcome
pickling-bulb yieldse0
Direction
higheste0
Value
625 plants m−2e0

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

Allium cepa
Allium cepa · TaxonMehdi · CC BY-SA 3.0 · Wikimedia Commons ↗

Verbatim

e0

“Total and pickling-bulb yields gave overturning type relationships with plant density and were highest at 400 and 625 plants m−2 respectively.”

✓ located verbatim in the source · abstract, characters 517–659 · show in text ↑
e1

“Onion seed cv White Spanish”

✓ located verbatim in the source · abstract, characters 7–34 · show in text ↑

density · quality: sugar starch · Allium cepa (onion)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
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density · phenology · Allium cepa (onion)Positive and negative results

6 papers: 1 positive, 5 negative or no effect

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density · growth · Allium cepa (onion)Positive and negative results

26 papers: 23 positive, 3 negative or no effect

2 papers in the same direction as this paper · 23 in the opposite direction

  1. positive
  2. positive
  3. positive

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density · yield · Allium cepa (onion)Positive and negative results

54 papers: 48 positive, 6 negative or no effect

5 papers in the same direction as this paper · 48 in the opposite direction

  1. no effect
  2. positive
  3. positive

50 papers more in this group

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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.