Paper · 1986 · Indian Journal of Horticulture

Crop Regulation in Guava By Urea Sprays

C. B. S. Rajput; Gorakh Singh; J. S. Mishra

8
claims
15
verbatim quotes
5
citations
3
research areas
✓
Open access

Abstract

Whole-tree sprays of aqueous solution of urea (10, 15 and 20 per cent) in April defoliates leaves and kill flower buds, thus, there is no fruiting in rainy season. Urea had a significant effect on per cent defoliation. Guava leaves drop normally between 19 and 25 days from the date of spraying. New leaves emerge between 17 and 23 days from the time of total defoliation. Fifty per cent blooming of flowers occurs after 21 to 27 days of the emergnce of new leaves. With the increase of the concentration of urea, there is maximization in number of fruits but the size of fruit reduces. Urea spray at 15 per cent is suitable for maximum fruit yield as well as better size of the fruits. Urea can be used to defoliate guava to induce new shoots, flowers and better quality fruit during winter.

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Claims 8

Intervention effectobservedoriginal resultpositivemeasured

Claim · model-written summary

April urea sprays defoliated guava and killed flower buds, preventing rainy season fruiting.

Treatment
urea (10, 15 and 20 per cent)e0
Outcome
fruiting in rainy seasone0
Direction
no fruitinge0

Not reportedComparator

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

Psidium guajava
Psidium guajava · TaxonFuadsyazwan ( talk ) · Public domain · Wikimedia Commons ↗

Verbatim

e0

“Whole-tree sprays of aqueous solution of urea (10, 15 and 20 per cent) in April defoliates leaves and kill flower buds, thus, there is no fruiting in rainy season.”

✓ located verbatim in the source · abstract, characters 0–163 · show in text ↑
t0

“Guava”

✓ located verbatim in the source · title, characters 19–24 · show in text ↑
Intervention effectobservedoriginal resultsignificant (as stated)measured

Claim · model-written summary

Urea significantly affected guava defoliation.

Treatment
Ureae0
Outcome
per cent defoliatione0

Not reportedComparatorDirection

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

Psidium guajava
Psidium guajava · TaxonFuadsyazwan ( talk ) · Public domain · Wikimedia Commons ↗

Verbatim

e0

“Urea had a significant effect on per cent defoliation.”

✓ located verbatim in the source · abstract, characters 164–218 · show in text ↑
t0

“Guava”

✓ located verbatim in the source · title, characters 19–24 · show in text ↑
Observationobservedoriginal resultmeasured

Claim · model-written summary

Guava leaves fell 19 to 25 days after spraying.

Outcome
leaves drope0
Value
19 and 25 dayse0

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

Psidium guajava
Psidium guajava · TaxonFuadsyazwan ( talk ) · Public domain · Wikimedia Commons ↗

Verbatim

e0

“Guava leaves drop normally between 19 and 25 days from the date of spraying.”

✓ located verbatim in the source · abstract, characters 219–295 · show in text ↑
Observationobservedoriginal resultmeasured

Claim · model-written summary

New guava leaves emerged 17 to 23 days after complete defoliation.

Outcome
New leaves emergee0
Value
17 and 23 dayse0

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

Psidium guajava
Psidium guajava · TaxonFuadsyazwan ( talk ) · Public domain · Wikimedia Commons ↗

Verbatim

e0

“New leaves emerge between 17 and 23 days from the time of total defoliation.”

✓ located verbatim in the source · abstract, characters 296–372 · show in text ↑
t0

“Guava”

✓ located verbatim in the source · title, characters 19–24 · show in text ↑
Observationobservedoriginal resultmeasured

Claim · model-written summary

Half the guava flowers bloomed 21 to 27 days after new leaves emerged.

Outcome
blooming of flowerse0
Value
21 to 27 dayse0

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

Psidium guajava
Psidium guajava · TaxonFuadsyazwan ( talk ) · Public domain · Wikimedia Commons ↗

Verbatim

e0

“Fifty per cent blooming of flowers occurs after 21 to 27 days of the emergnce of new leaves.”

✓ located verbatim in the source · abstract, characters 373–465 · show in text ↑
t0

“Guava”

✓ located verbatim in the source · title, characters 19–24 · show in text ↑
Intervention effectobservedoriginal resultpositivemeasured

Claim · model-written summary

Higher urea concentration increased fruit number.

Treatment
ureae0
Outcome
number of fruitse0
Direction
maximizatione0

Not reportedComparator

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

Psidium guajava
Psidium guajava · TaxonFuadsyazwan ( talk ) · Public domain · Wikimedia Commons ↗

Verbatim

e0

“With the increase of the concentration of urea, there is maximization in number of fruits but the size of fruit reduces.”

✓ located verbatim in the source · abstract, characters 466–586 · show in text ↑
t0

“Guava”

✓ located verbatim in the source · title, characters 19–24 · show in text ↑
Intervention effectobservedoriginal resultnegativemeasured

Claim · model-written summary

Higher urea concentration reduced fruit size.

Treatment
ureae0
Outcome
size of fruite0
Direction
reducese0

Not reportedComparator

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

Psidium guajava
Psidium guajava · TaxonFuadsyazwan ( talk ) · Public domain · Wikimedia Commons ↗

Verbatim

e0

“With the increase of the concentration of urea, there is maximization in number of fruits but the size of fruit reduces.”

✓ located verbatim in the source · abstract, characters 466–586 · show in text ↑
t0

“Guava”

✓ located verbatim in the source · title, characters 19–24 · show in text ↑
Recommendationauthor interpretationoriginal resultbasis n/a

Claim · model-written summary

The authors recommend 15% urea spray for yield and fruit size.

Treatment
Urea spray at 15 per cente0
Outcome
maximum fruit yield as well as better size of the fruitse0

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

Psidium guajava
Psidium guajava · TaxonFuadsyazwan ( talk ) · Public domain · Wikimedia Commons ↗

Verbatim

e0

“Urea spray at 15 per cent is suitable for maximum fruit yield as well as better size of the fruits.”

✓ located verbatim in the source · abstract, characters 587–686 · show in text ↑
t0

“Guava”

✓ located verbatim in the source · title, characters 19–24 · show in text ↑

nitrogen · growth · Psidium guajava (guava)Positive and negative results

23 papers: 20 positive, 3 negative or no effect

2 papers in the same direction as this paper · 20 in the opposite direction

  1. positive
  2. positive
  3. positive

19 papers more in this group

See all 23 papers →

nitrogen · phenology · Psidium guajava (guava)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 →

nitrogen · yield · Psidium guajava (guava)Results agree

33 papers: 33 positive, 0 negative or no effect

32 papers in the same direction as this paper

  1. positive
  2. positive
  3. positive

29 papers more in this group

See all 33 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.