Paper · 1988 · Journal of the American Oil Chemists Society

Cottonseed, protein and oil yields and oil properties as affected by nitrogen and phosphorus fertilization and growth regulators

Zakaria M. Sawan; Abd El‐Hamid A. El‐Farra; Sania Abd El‐Latif

15
claims
30
verbatim quotes
8
citations
2
research areas
—
Not open access

Abstract

Abstract Two experiments were carried out at our research center during the 1981 and 1982 seasons on cotton cultivar Giza 75 ( Gossypium barbadense L. ) to investigate the influence of nitrogen fertilization rates (72, 144 or 216 kg/ha.), phosphorus levels (36 or 72 kg P 2 O 5 /ha.) and three growth regulators (IAA, IBA or NAA) applied to cotton plants at 10 ppm and sprayed three times (70, 85 and 100 days after sowing) on protein and oil yields, and oil properties. A randomized complete block design with four replications treatment combinations was used. The combined analysis of the results of the two seasons revealed that yields of cottonseed, oil and protein increased by raising nitrogen and phosphorus levels and under the application of growth regulators. Seed index increased by raising the added nitrogen and the applied growth regulants. No detectable effect of phosphorus levels was observed. The seed oil percentage decreased, although the protein percentage increased, when the nitrogen application rate was raised. Application of growth regulators and a high phosphorus level increased the seed oil percentage, but the seed protein percentage was not affected. The seed oil properties, i.e., acidity, saponification and iodine values, tended to decrease slightly by increasing the nitrogen application rate and the application of growth substances, but the trend reversed when the phosphorus level was raised. The mean values of oil specific gravity and refractive index did not show any definite responses.

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 15

Intervention effectobservedoriginal resultpositivemeasured

Claim · model-written summary

Cottonseed, oil and protein yields increased by raising nitrogen level.

Material
Giza 75e0
Treatment
raising nitrogene1
Outcome
yields of cottonseed, oil and proteine1
Direction
increasede1

Not reportedComparator

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

Gossypium hirsutum
Gossypium hirsutum · TaxonChriKo · CC BY-SA 3.0 · Wikimedia Commons ↗

Verbatim

e0

“cotton cultivar Giza 75 ( Gossypium barbadense L. )”

✓ located verbatim in the source · abstract, characters 101–152 · show in text ↑
e1

“yields of cottonseed, oil and protein increased by raising nitrogen”

✓ located verbatim in the source · abstract, characters 632–699 · show in text ↑
Intervention effectobservedoriginal resultpositivemeasured

Claim · model-written summary

Cottonseed, oil and protein yields increased by raising phosphorus level.

Material
Giza 75e0
Treatment
phosphorus levelse1
Outcome
yields of cottonseed, oil and proteine1
Direction
increasede1

Not reportedComparator

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

Gossypium hirsutum
Gossypium hirsutum · TaxonChriKo · CC BY-SA 3.0 · Wikimedia Commons ↗

Verbatim

e0

“cotton cultivar Giza 75 ( Gossypium barbadense L. )”

✓ located verbatim in the source · abstract, characters 101–152 · show in text ↑
e1

“yields of cottonseed, oil and protein increased by raising nitrogen and phosphorus levels”

✓ located verbatim in the source · abstract, characters 632–721 · show in text ↑
Intervention effectobservedoriginal resultpositivemeasured

Claim · model-written summary

Cottonseed, oil and protein yields increased under growth regulator application.

Material
Giza 75e0
Treatment
growth regulatorse1
Outcome
yields of cottonseed, oil and proteine1
Direction
increasede1

Not reportedComparator

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

Gossypium hirsutum
Gossypium hirsutum · TaxonChriKo · CC BY-SA 3.0 · Wikimedia Commons ↗

Verbatim

e0

“cotton cultivar Giza 75 ( Gossypium barbadense L. )”

✓ located verbatim in the source · abstract, characters 101–152 · show in text ↑
e1

“yields of cottonseed, oil and protein increased by raising nitrogen and phosphorus levels and under the application of growth regulators”

✓ located verbatim in the source · abstract, characters 632–768 · show in text ↑
Intervention effectobservedoriginal resultpositivemeasured

Claim · model-written summary

Seed index increased by raising the added nitrogen.

Material
Giza 75e0
Treatment
raising the added nitrogene1
Outcome
Seed indexe1
Direction
increasede1

Not reportedComparator

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

Gossypium hirsutum
Gossypium hirsutum · TaxonChriKo · CC BY-SA 3.0 · Wikimedia Commons ↗

Verbatim

e0

“cotton cultivar Giza 75 ( Gossypium barbadense L. )”

✓ located verbatim in the source · abstract, characters 101–152 · show in text ↑
e1

“Seed index increased by raising the added nitrogen”

✓ located verbatim in the source · abstract, characters 770–820 · show in text ↑
Intervention effectobservedoriginal resultpositivemeasured

Claim · model-written summary

Seed index increased with the applied growth regulants.

Material
Giza 75e0
Treatment
the applied growth regulantse1
Outcome
Seed indexe1
Direction
increasede1

Not reportedComparator

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

Gossypium hirsutum
Gossypium hirsutum · TaxonChriKo · CC BY-SA 3.0 · Wikimedia Commons ↗

Verbatim

e0

“cotton cultivar Giza 75 ( Gossypium barbadense L. )”

✓ located verbatim in the source · abstract, characters 101–152 · show in text ↑
e1

“Seed index increased by raising the added nitrogen and the applied growth regulants”

✓ located verbatim in the source · abstract, characters 770–853 · show in text ↑
Intervention effectobservedoriginal resultno effectmeasured

Claim · model-written summary

No detectable effect of phosphorus levels was observed.

Material
Giza 75e0
Treatment
phosphorus levelse1
Direction
No detectable effecte1

Not reportedComparatorOutcome

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

Gossypium hirsutum
Gossypium hirsutum · TaxonChriKo · CC BY-SA 3.0 · Wikimedia Commons ↗

Verbatim

e0

“cotton cultivar Giza 75 ( Gossypium barbadense L. )”

✓ located verbatim in the source · abstract, characters 101–152 · show in text ↑
e1

“No detectable effect of phosphorus levels was observed”

✓ located verbatim in the source · abstract, characters 855–909 · show in text ↑
Intervention effectobservedoriginal resultnegativemeasured

Claim · model-written summary

Seed oil percentage decreased when the nitrogen application rate was raised.

Material
Giza 75e0
Treatment
the nitrogen application rate was raisede1
Outcome
seed oil percentagee1
Direction
decreasede1

Not reportedComparator

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

Gossypium hirsutum
Gossypium hirsutum · TaxonChriKo · CC BY-SA 3.0 · Wikimedia Commons ↗

Verbatim

e0

“cotton cultivar Giza 75 ( Gossypium barbadense L. )”

✓ located verbatim in the source · abstract, characters 101–152 · show in text ↑
e1

“The seed oil percentage decreased, although the protein percentage increased, when the nitrogen application rate was raised”

✓ located verbatim in the source · abstract, characters 911–1034 · show in text ↑
Intervention effectobservedoriginal resultpositivemeasured

Claim · model-written summary

Seed protein percentage increased when the nitrogen application rate was raised.

Material
Giza 75e0
Treatment
the nitrogen application rate was raisede1
Outcome
protein percentagee1
Direction
increasede1

Not reportedComparator

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

Gossypium hirsutum
Gossypium hirsutum · TaxonChriKo · CC BY-SA 3.0 · Wikimedia Commons ↗

Verbatim

e0

“cotton cultivar Giza 75 ( Gossypium barbadense L. )”

✓ located verbatim in the source · abstract, characters 101–152 · show in text ↑
e1

“The seed oil percentage decreased, although the protein percentage increased, when the nitrogen application rate was raised”

✓ located verbatim in the source · abstract, characters 911–1034 · show in text ↑
Intervention effectobservedoriginal resultpositivemeasured

Claim · model-written summary

Application of growth regulators increased the seed oil percentage.

Material
Giza 75e0
Treatment
Application of growth regulatorse1
Outcome
seed oil percentagee1
Direction
increasede1

Not reportedComparator

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

Gossypium hirsutum
Gossypium hirsutum · TaxonChriKo · CC BY-SA 3.0 · Wikimedia Commons ↗

Verbatim

e0

“cotton cultivar Giza 75 ( Gossypium barbadense L. )”

✓ located verbatim in the source · abstract, characters 101–152 · show in text ↑
e1

“Application of growth regulators and a high phosphorus level increased the seed oil percentage”

✓ located verbatim in the source · abstract, characters 1036–1130 · show in text ↑
Intervention effectobservedoriginal resultpositivemeasured

Claim · model-written summary

A high phosphorus level increased the seed oil percentage.

Material
Giza 75e0
Treatment
a high phosphorus levele1
Outcome
seed oil percentagee1
Direction
increasede1

Not reportedComparator

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

Gossypium hirsutum
Gossypium hirsutum · TaxonChriKo · CC BY-SA 3.0 · Wikimedia Commons ↗

Verbatim

e0

“cotton cultivar Giza 75 ( Gossypium barbadense L. )”

✓ located verbatim in the source · abstract, characters 101–152 · show in text ↑
e1

“Application of growth regulators and a high phosphorus level increased the seed oil percentage”

✓ located verbatim in the source · abstract, characters 1036–1130 · show in text ↑
Intervention effectobservedoriginal resultno effectmeasured

Claim · model-written summary

Seed protein percentage was not affected by growth regulators or a high phosphorus level.

Material
Giza 75e0
Treatment
growth regulators and a high phosphorus levele1
Outcome
seed protein percentagee1
Direction
no_changeinferrede1

Not reportedComparator

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

Gossypium hirsutum
Gossypium hirsutum · TaxonChriKo · CC BY-SA 3.0 · Wikimedia Commons ↗

Verbatim

e0

“cotton cultivar Giza 75 ( Gossypium barbadense L. )”

✓ located verbatim in the source · abstract, characters 101–152 · show in text ↑
e1

“Application of growth regulators and a high phosphorus level increased the seed oil percentage, but the seed protein percentage was not affected”

✓ located verbatim in the source · abstract, characters 1036–1180 · show in text ↑
Intervention effectobservedoriginal resultpositivemeasured

Claim · model-written summary

Seed oil acidity, saponification and iodine values tended to decrease slightly with increasing nitrogen application rate.

Material
Giza 75e0
Treatment
increasing the nitrogen application ratee1
Outcome
acidity, saponification and iodine valuese1
Direction
decreasee1

Not reportedComparator

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

Gossypium hirsutum
Gossypium hirsutum · TaxonChriKo · CC BY-SA 3.0 · Wikimedia Commons ↗

Verbatim

e0

“cotton cultivar Giza 75 ( Gossypium barbadense L. )”

✓ located verbatim in the source · abstract, characters 101–152 · show in text ↑
e1

“The seed oil properties, i.e., acidity, saponification and iodine values, tended to decrease slightly by increasing the nitrogen application rate”

✓ located verbatim in the source · abstract, characters 1182–1327 · show in text ↑
Intervention effectobservedoriginal resultpositivemeasured

Claim · model-written summary

Seed oil acidity, saponification and iodine values tended to decrease slightly with the application of growth substances.

Material
Giza 75e0
Treatment
the application of growth substancese1
Outcome
acidity, saponification and iodine valuese1
Direction
decreasee1

Not reportedComparator

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

Gossypium hirsutum
Gossypium hirsutum · TaxonChriKo · CC BY-SA 3.0 · Wikimedia Commons ↗

Verbatim

e0

“cotton cultivar Giza 75 ( Gossypium barbadense L. )”

✓ located verbatim in the source · abstract, characters 101–152 · show in text ↑
e1

“The seed oil properties, i.e., acidity, saponification and iodine values, tended to decrease slightly by increasing the nitrogen application rate and the application of growth substances”

✓ located verbatim in the source · abstract, characters 1182–1368 · show in text ↑
Intervention effectobservedoriginal resultpositivemeasured

Claim · model-written summary

The decreasing trend in oil acidity, saponification and iodine values reversed when the phosphorus level was raised.

Material
Giza 75e0
Treatment
the phosphorus level was raisede1
Outcome
acidity, saponification and iodine valuese1
Direction
reversede1

Not reportedComparator

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

Gossypium hirsutum
Gossypium hirsutum · TaxonChriKo · CC BY-SA 3.0 · Wikimedia Commons ↗

Verbatim

e0

“cotton cultivar Giza 75 ( Gossypium barbadense L. )”

✓ located verbatim in the source · abstract, characters 101–152 · show in text ↑
e1

“The seed oil properties, i.e., acidity, saponification and iodine values, tended to decrease slightly by increasing the nitrogen application rate and the application of growth substances, but the trend reversed when the phosphorus level was raised”

✓ located verbatim in the source · abstract, characters 1182–1429 · show in text ↑
Intervention effectobservedoriginal resultno effectmeasured

Claim · model-written summary

Mean oil specific gravity and refractive index showed no definite responses.

Material
Giza 75e0
Outcome
oil specific gravity and refractive indexe1
Direction
did not show any definite responsese1

Not reportedTreatmentComparator

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

Gossypium hirsutum
Gossypium hirsutum · TaxonChriKo · CC BY-SA 3.0 · Wikimedia Commons ↗

Verbatim

e0

“cotton cultivar Giza 75 ( Gossypium barbadense L. )”

✓ located verbatim in the source · abstract, characters 101–152 · show in text ↑
e1

“The mean values of oil specific gravity and refractive index did not show any definite responses”

✓ located verbatim in the source · abstract, characters 1431–1527 · show in text ↑

class · quality: protein · Gossypium hirsutum (cotton)Positive and negative results

5 papers: 4 positive, 1 negative or no effect

3 papers in the same direction as this paper · 1 in the opposite direction

  1. negative
  2. positive
  3. positive

1 paper more in this group

See all 5 papers →

nitrogen · quality: sugar starch · Gossypium hirsutum (cotton)Positive and negative results

5 papers: 3 positive, 2 negative or no effect

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

  1. negative
  2. negative
  3. positive

1 paper more in this group

See all 5 papers →

nitrogen · quality: oil · Gossypium hirsutum (cotton)Positive and negative results

10 papers: 7 positive, 3 negative or no effect

2 papers in the same direction as this paper · 7 in the opposite direction

  1. positive
  2. positive
  3. positive

6 papers more in this group

See all 10 papers →

nitrogen · yield · Gossypium hirsutum (cotton)Positive and negative results

343 papers: 286 positive, 57 negative or no effect

285 papers in the same direction as this paper · 53 in the opposite direction · 4 reporting no difference from an alternative

  1. positive
  2. no effect
  3. no effect

339 papers more in this group

See all 343 papers →

phosphorus · quality: sugar starch · Gossypium hirsutum (cotton)Results agree

2 papers: 2 positive, 0 negative or no effect

1 paper in the same direction as this paper

  1. positive
See all 2 papers →

phosphorus · quality: protein · Gossypium hirsutum (cotton)Results agree

3 papers: 3 positive, 0 negative or no effect

2 papers in the same direction as this paper

  1. positive
  2. positive
See all 3 papers →

class · quality: oil · Gossypium hirsutum (cotton)Results agree

3 papers: 3 positive, 0 negative or no effect

2 papers in the same direction as this paper

  1. positive
  2. positive
See all 3 papers →

phosphorus · quality: oil · Gossypium hirsutum (cotton)Results agree

3 papers: 3 positive, 0 negative or no effect

2 papers in the same direction as this paper

  1. positive
  2. positive
See all 3 papers →

8 of 9 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.