Paper · 1981 · Experimental Agriculture

Effects of Gypsum and Zinc on Rice Nutrition on Sodic Soil

P. N. Takkar; V. K. Nayyar

9
claims
14
verbatim quotes
16
citations
2
research areas
—
Not open access

Abstract

SUMMARY A field experiment was conducted on a Zn-deficient highly-deteriorated sodic soil of the Ghabdan series to determine the effect of three rates of gypsum (G 0 , G 25 , G 50 % of the gypsum requirement of soil) and three rates of Zn (Zn 0 , Zn 11 , Zn 22 kg Zn/ha) on rice variety PR 106. Gypsum application significantly increased yield and Zn uptake in rice because of a significant decrease in soil pH and increase in Ca and Zn supply. Zinc application alone significantly increased soil and plant Zn but yields were poorer than with gypsum application alone because of Ca deficiency/Na toxicity. The same rates of Zn applied together with gypsum markedly increased yield and Zn uptake, revealing a deficiency of both Ca and Zn. The best grain yield was recorded either at G 50 Zn 11 or G 25 Zn 22 , indicating an economy in gypsum at higher rates of Zn or of Zn at higher rates of gypsum application.

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Claims 9

Intervention effectobservedoriginal resultpositivesignificant (as stated)measured

Claim · model-written summary

Gypsum significantly increased rice yield.

Treatment
Gypsum applicatione0
Outcome
yielde0
Direction
increasede0

Not reportedComparator

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

Oryza sativa
Oryza sativa · Taxon · picture from its Wikimedia Commons categoryDesmanthus4food · CC BY-SA 3.0 us · Wikimedia Commons ↗

Verbatim

e0

“Gypsum application significantly increased yield and Zn uptake in rice”

✓ located verbatim in the source · abstract, characters 295–365 · show in text ↑
Intervention effectobservedoriginal resultpositivesignificant (as stated)measured

Claim · model-written summary

Gypsum significantly increased rice zinc uptake.

Treatment
Gypsum applicatione0
Outcome
Zn uptakee0
Direction
increasede0

Not reportedComparator

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

Oryza sativa
Oryza sativa · Taxon · picture from its Wikimedia Commons categoryDesmanthus4food · CC BY-SA 3.0 us · Wikimedia Commons ↗

Verbatim

e0

“Gypsum application significantly increased yield and Zn uptake in rice”

✓ located verbatim in the source · abstract, characters 295–365 · show in text ↑
Mechanismauthor interpretationoriginal resultpositivesignificant (as stated)measured

Claim · model-written summary

Gypsum decreased soil pH and increased calcium and zinc supply.

Treatment
Gypsum applicatione0
Outcome
soil pH and increase in Ca and Zn supplye0
Qualifier
significant decreasee0

Not reportedTaxon

Verbatim

e0

“Gypsum application significantly increased yield and Zn uptake in rice because of a significant decrease in soil pH and increase in Ca and Zn supply”

✓ located verbatim in the source · abstract, characters 295–443 · show in text ↑
Intervention effectobservedoriginal resultpositivesignificant (as stated)measured

Claim · model-written summary

Zinc alone significantly increased soil and plant zinc.

Taxon
plante0
Treatment
Zinc application alonee0
Outcome
soil and plant Zne0
Direction
increasede0

Not reportedComparator

Verbatim

e0

“Zinc application alone significantly increased soil and plant Zn”

✓ located verbatim in the source · abstract, characters 445–509 · show in text ↑
Intervention effectobservedoriginal resultnegativemeasured

Claim · model-written summary

Yield under zinc alone was poorer than under gypsum alone.

Treatment
Zinc application alonee0
Outcome
yieldse0
Direction
poorere0
Qualifier
Ca deficiency/Na toxicitye0
Comparator
gypsum application alonee0

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

Oryza sativa
Oryza sativa · Taxon · picture from its Wikimedia Commons categoryDesmanthus4food · CC BY-SA 3.0 us · Wikimedia Commons ↗

Verbatim

e0

“Zinc application alone significantly increased soil and plant Zn but yields were poorer than with gypsum application alone because of Ca deficiency/Na toxicity”

✓ located verbatim in the source · abstract, characters 445–604 · show in text ↑
t0

“Rice Nutrition”

✓ located verbatim in the source · title, characters 30–44 · show in text ↑
Intervention effectobservedoriginal resultpositivemeasured

Claim · model-written summary

Zinc plus gypsum markedly increased yield.

Treatment
Zn applied together with gypsume0
Outcome
yielde0
Direction
increasede0

Not reportedComparator

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

Oryza sativa
Oryza sativa · Taxon · picture from its Wikimedia Commons categoryDesmanthus4food · CC BY-SA 3.0 us · Wikimedia Commons ↗

Verbatim

e0

“The same rates of Zn applied together with gypsum markedly increased yield and Zn uptake”

✓ located verbatim in the source · abstract, characters 606–694 · show in text ↑
t0

“Rice Nutrition”

✓ located verbatim in the source · title, characters 30–44 · show in text ↑
Intervention effectobservedoriginal resultpositivemeasured

Claim · model-written summary

Zinc plus gypsum markedly increased zinc uptake.

Treatment
Zn applied together with gypsume0
Outcome
Zn uptakee0
Direction
increasede0

Not reportedComparator

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

Oryza sativa
Oryza sativa · Taxon · picture from its Wikimedia Commons categoryDesmanthus4food · CC BY-SA 3.0 us · Wikimedia Commons ↗

Verbatim

e0

“The same rates of Zn applied together with gypsum markedly increased yield and Zn uptake”

✓ located verbatim in the source · abstract, characters 606–694 · show in text ↑
t0

“Rice Nutrition”

✓ located verbatim in the source · title, characters 30–44 · show in text ↑
Observationobservedoriginal resultpositivemeasured

Claim · model-written summary

The best grain yield occurred at G 50 Zn 11 or G 25 Zn 22.

Treatment
G 50 Zn 11 or G 25 Zn 22e0
Outcome
grain yielde0
Direction
beste0

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

Oryza sativa
Oryza sativa · Taxon · picture from its Wikimedia Commons categoryDesmanthus4food · CC BY-SA 3.0 us · Wikimedia Commons ↗

Verbatim

e0

“The best grain yield was recorded either at G 50 Zn 11 or G 25 Zn 22”

✓ located verbatim in the source · abstract, characters 738–806 · show in text ↑
t0

“Rice Nutrition”

✓ located verbatim in the source · title, characters 30–44 · show in text ↑
Recommendationauthor interpretationoriginal resultpositivebasis n/a

Claim · model-written summary

Higher zinc rates could economize gypsum and higher gypsum rates could economize zinc.

Outcome
economy in gypsum at higher rates of Zn or of Zn at higher rates of gypsum applicatione0

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

Oryza sativa
Oryza sativa · Taxon · picture from its Wikimedia Commons categoryDesmanthus4food · CC BY-SA 3.0 us · Wikimedia Commons ↗

Verbatim

e0

“indicating an economy in gypsum at higher rates of Zn or of Zn at higher rates of gypsum application”

✓ located verbatim in the source · abstract, characters 809–909 · show in text ↑
t0

“Rice Nutrition”

✓ located verbatim in the source · title, characters 30–44 · show in text ↑

zinc atom · nutrient: content · Oryza sativa (rice)Results differ

276 papers: 254 positive, 22 negative or no effect

253 papers in the same direction as this paper · 21 in the opposite direction · 1 reporting no difference from an alternative

  1. positive
  2. negative
  3. no effect

272 papers more in this group

See all 276 papers →

zinc atom · yield · Oryza sativa (rice)Results differ

419 papers: 389 positive, 30 negative or no effect

388 papers in the same direction as this paper · 28 in the opposite direction · 2 reporting no difference from an alternative

  1. positive
  2. no effect
  3. negative

415 papers more in this group

See all 419 papers →

lime · yield · Oryza sativa (rice)Results differ

136 papers: 123 positive, 13 negative or no effect

122 papers in the same direction as this paper · 10 in the opposite direction · 3 reporting no difference from an alternative

  1. positive
  2. negative
  3. no effect

132 papers more in this group

See all 136 papers →

lime · nutrient: content · Oryza sativa (rice)Positive and negative results

55 papers: 52 positive, 3 negative or no effect

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

  1. positive
  2. no effect
  3. no effect

51 papers more in this group

See all 55 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.