Abstract
Responses on various characters of guava trees due to foliar spray of zinc were studied in the field trial. The guava trees were sprayed with 0.0%, 0.2% and 0.4% zinc sulphate solutions during July 1966 and 1967. Significant improvement in growth characters, i.e., elongation of terminal shoot, number of leaves, leaf area per shoot and chlorophyll recovery was observed with zinc spray. The zinc spray also significantly reduced the time for fruit maturity and increased fruit yield significantly. The significant improvement was also recorded on Fruit weight, length, diameter, reducing sugars, Vitamin C, pectic substances and total soluble solids, And significant reduction in acidity.
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
Claim · model-written summary
Zinc spray significantly improved elongation of terminal shoot, number of leaves and leaf area per shoot in guava.
- Taxon
- guava
Psidium guajavae0 - Treatment
- zinc spraye1
- Outcome
- elongation of terminal shoot, number of leaves, leaf area per shoote1
- Direction
- improvemente1
Not reportedComparator
Organisms pictured · Representative pictures of the matched species, not figures from the paper.

Verbatim
e0“The guava trees were sprayed with 0.0%, 0.2% and 0.4% zinc sulphate solutions”
e1“Significant improvement in growth characters, i.e., elongation of terminal shoot, number of leaves, leaf area per shoot and chlorophyll recovery was observed with zinc spray”
Claim · model-written summary
Zinc spray significantly improved chlorophyll recovery in guava.
- Taxon
- guava
Psidium guajavae0 - Treatment
- zinc spraye1
- Outcome
- chlorophyll recoverye1
- Direction
- improvemente1
Not reportedComparator
Organisms pictured · Representative pictures of the matched species, not figures from the paper.

Verbatim
e0“The guava trees were sprayed with 0.0%, 0.2% and 0.4% zinc sulphate solutions”
e1“Significant improvement in growth characters, i.e., elongation of terminal shoot, number of leaves, leaf area per shoot and chlorophyll recovery was observed with zinc spray”
Claim · model-written summary
Zinc spray significantly reduced the time to fruit maturity in guava.
- Taxon
- guava
Psidium guajavae0 - Treatment
- zinc spraye2
- Outcome
- time for fruit maturitye2
- Direction
- reducede2
Not reportedComparator
Organisms pictured · Representative pictures of the matched species, not figures from the paper.

Verbatim
e0“The guava trees were sprayed with 0.0%, 0.2% and 0.4% zinc sulphate solutions”
e2“The zinc spray also significantly reduced the time for fruit maturity and increased fruit yield significantly”
Claim · model-written summary
Zinc spray significantly increased fruit yield in guava.
- Taxon
- guava
Psidium guajavae0 - Treatment
- zinc spraye2
- Outcome
- fruit yielde2
- Direction
- increasede2
Not reportedComparator
Organisms pictured · Representative pictures of the matched species, not figures from the paper.

Verbatim
e0“The guava trees were sprayed with 0.0%, 0.2% and 0.4% zinc sulphate solutions”
e2“The zinc spray also significantly reduced the time for fruit maturity and increased fruit yield significantly”
Claim · model-written summary
Zinc spray significantly improved fruit weight, length and diameter in guava.
- Taxon
- guava
Psidium guajavae0 - Treatment
- zinc spraye2
- Outcome
- Fruit weight, length, diametere3
- Direction
- improvemente3
Not reportedComparator
Organisms pictured · Representative pictures of the matched species, not figures from the paper.

Verbatim
e0“The guava trees were sprayed with 0.0%, 0.2% and 0.4% zinc sulphate solutions”
e2“The zinc spray also significantly reduced the time for fruit maturity and increased fruit yield significantly”
e3“The significant improvement was also recorded on Fruit weight, length, diameter, reducing sugars, Vitamin C, pectic substances and total soluble solids”
Claim · model-written summary
Zinc spray significantly improved reducing sugars, Vitamin C and pectic substances in guava fruit.
- Taxon
- guava
Psidium guajavae0 - Treatment
- zinc spraye2
- Outcome
- reducing sugars, Vitamin C, pectic substancese3
- Direction
- improvemente3
Not reportedComparator
Organisms pictured · Representative pictures of the matched species, not figures from the paper.

Verbatim
e0“The guava trees were sprayed with 0.0%, 0.2% and 0.4% zinc sulphate solutions”
e2“The zinc spray also significantly reduced the time for fruit maturity and increased fruit yield significantly”
e3“The significant improvement was also recorded on Fruit weight, length, diameter, reducing sugars, Vitamin C, pectic substances and total soluble solids”
Claim · model-written summary
Zinc spray significantly improved total soluble solids in guava fruit.
- Taxon
- guava
Psidium guajavae0 - Treatment
- zinc spraye2
- Outcome
- total soluble solidse3
- Direction
- improvemente3
Not reportedComparator
Organisms pictured · Representative pictures of the matched species, not figures from the paper.

Verbatim
e0“The guava trees were sprayed with 0.0%, 0.2% and 0.4% zinc sulphate solutions”
e2“The zinc spray also significantly reduced the time for fruit maturity and increased fruit yield significantly”
e3“The significant improvement was also recorded on Fruit weight, length, diameter, reducing sugars, Vitamin C, pectic substances and total soluble solids”
Claim · model-written summary
Zinc spray significantly reduced acidity of guava fruit.
- Taxon
- guava
Psidium guajavae0 - Treatment
- zinc spraye2
- Outcome
- aciditye4
- Direction
- reductione4
Not reportedComparator
Organisms pictured · Representative pictures of the matched species, not figures from the paper.

Verbatim
e0“The guava trees were sprayed with 0.0%, 0.2% and 0.4% zinc sulphate solutions”
e2“The zinc spray also significantly reduced the time for fruit maturity and increased fruit yield significantly”
e4“And significant reduction in acidity”
The same questions in other papers
zinc atom · phenology · Psidium guajava (guava)Results agree
1 paper in the same direction as this paper
- positive
zinc atom · physiology: pigments · Psidium guajava (guava)Results agree
1 paper in the same direction as this paper
- positive
zinc atom · quality: sugar starch · Psidium guajava (guava)Results agree
9 papers in the same direction as this paper
- positive
- positive
- positive
6 papers more in this group
See all 10 papers →zinc atom · growth · Psidium guajava (guava)Results agree
12 papers in the same direction as this paper
- positive
- positive
- positive
9 papers more in this group
See all 13 papers →zinc atom · yield · Psidium guajava (guava)Results agree
20 papers in the same direction as this paper
- positive
- positive
- positive
17 papers more in this group
See all 21 papers →application · physiology: pigments · Psidium guajava (guava)Positive and negative results
7 papers in the same direction as this paper · 1 in the opposite direction
- no effect
- positive
- positive
5 papers more in this group
See all 9 papers →application · growth · Psidium guajava (guava)Positive and negative results
27 papers in the same direction as this paper · 1 in the opposite direction
- no effect
- positive
- positive
25 papers more in this group
See all 29 papers →application · quality: sugar starch · Psidium guajava (guava)Positive and negative results
28 papers in the same direction as this paper · 1 in the opposite direction
- no effect
- positive
- positive
26 papers more in this group
See all 30 papers →8 of 10 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.