Paper · 1976 · The Journal of Agricultural Science

A note on leaf removal in hybrid maize

R. P. Singh; K. P. P. Nair; K. C. Sharma

9
claims
21
verbatim quotes
4
citations
2
research areas
—
Not open access

Abstract

Summary The effects of differing degrees of leaf removal was studied in maize at different stages of growth and in varying plant densities. In control (untreated) plants significantly lower grain yield/unit area at the higher density (90000 plants/ha) was associated with greater barrenness, percentage of lodging and time taken for silking. Increase in plant density from 60000 to 90000 plants/ha led to a reduction in length and diameter of the ear and in weight of 1000 grains. Delay in the time of leaf removal from the tasselling stage until 10 days later increased yield, number of ears, ear length, diameter and test weight and decreased percentage of barrenness and lodging. Leaf removal adversely affected yield and yield components (number of ears, percentage of lodging, ear size and test weight of 1000 grains). Complete leaf removal at tasselling time delayed silking and reduced lodging.

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Claims 9

Associationobservedoriginal resultnegativesignificant (as stated)measured

Claim · model-written summary

In untreated control maize, grain yield per unit area was significantly lower at the higher density of 90000 plants/ha.

Taxon
maizeZea mayse0
Treatment
higher density (90000 plants/ha)e1
Outcome
grain yield/unit areae1
Direction
lowere1
Qualifier
control (untreated) plantse1

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

Zea mays
Zea mays · TaxonAkwugo · CC BY-SA 4.0 · Wikimedia Commons ↗

Verbatim

e0

“studied in maize”

✓ located verbatim in the source · abstract, characters 61–77 · show in text ↑
e1

“In control (untreated) plants significantly lower grain yield/unit area at the higher density (90000 plants/ha) was associated with greater barrenness, percentage of lodging and time taken for silking”

✓ located verbatim in the source · abstract, characters 140–340 · show in text ↑
Associationobservedoriginal resultnegativemeasured

Claim · model-written summary

At the higher density of 90000 plants/ha, maize had greater barrenness, lodging and time to silking.

Taxon
maizeZea mayse0
Treatment
higher density (90000 plants/ha)e1
Outcome
barrenness, percentage of lodging and time taken for silkinge1
Direction
greatere1

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

Zea mays
Zea mays · TaxonAkwugo · CC BY-SA 4.0 · Wikimedia Commons ↗

Verbatim

e0

“studied in maize”

✓ located verbatim in the source · abstract, characters 61–77 · show in text ↑
e1

“In control (untreated) plants significantly lower grain yield/unit area at the higher density (90000 plants/ha) was associated with greater barrenness, percentage of lodging and time taken for silking”

✓ located verbatim in the source · abstract, characters 140–340 · show in text ↑
Intervention effectobservedoriginal resultnegativemeasured

Claim · model-written summary

Raising plant density from 60000 to 90000 plants/ha reduced ear length and diameter and 1000-grain weight.

Taxon
maizeZea mayse0
Organ / stage
eare2
Treatment
Increase in plant density from 60000 to 90000 plants/hae2
Outcome
length and diameter of the ear and in weight of 1000 grainse2
Direction
reductione2
Comparator
from 60000e2

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

Zea mays
Zea mays · TaxonAkwugo · CC BY-SA 4.0 · Wikimedia Commons ↗

Verbatim

e0

“studied in maize”

✓ located verbatim in the source · abstract, characters 61–77 · show in text ↑
e2

“Increase in plant density from 60000 to 90000 plants/ha led to a reduction in length and diameter of the ear and in weight of 1000 grains”

✓ located verbatim in the source · abstract, characters 342–479 · show in text ↑
Intervention effectobservedoriginal resultpositivemeasured

Claim · model-written summary

Delaying leaf removal from tasselling by 10 days increased yield and number of ears.

Taxon
maizeZea mayse0
Treatment
Delay in the time of leaf removal from the tasselling stage until 10 days latere3
Outcome
yield, number of earse3
Direction
increasede3
Comparator
tasselling stagee3

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

Zea mays
Zea mays · TaxonAkwugo · CC BY-SA 4.0 · Wikimedia Commons ↗

Verbatim

e0

“studied in maize”

✓ located verbatim in the source · abstract, characters 61–77 · show in text ↑
e3

“Delay in the time of leaf removal from the tasselling stage until 10 days later increased yield, number of ears, ear length, diameter and test weight and decreased percentage of barrenness and lodging”

✓ located verbatim in the source · abstract, characters 481–681 · show in text ↑
Intervention effectobservedoriginal resultpositivemeasured

Claim · model-written summary

Delaying leaf removal from tasselling by 10 days increased ear length, diameter and test weight.

Taxon
maizeZea mayse0
Treatment
Delay in the time of leaf removal from the tasselling stage until 10 days latere3
Outcome
ear length, diameter and test weighte3
Direction
increasede3
Comparator
tasselling stagee3

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

Zea mays
Zea mays · TaxonAkwugo · CC BY-SA 4.0 · Wikimedia Commons ↗

Verbatim

e0

“studied in maize”

✓ located verbatim in the source · abstract, characters 61–77 · show in text ↑
e3

“Delay in the time of leaf removal from the tasselling stage until 10 days later increased yield, number of ears, ear length, diameter and test weight and decreased percentage of barrenness and lodging”

✓ located verbatim in the source · abstract, characters 481–681 · show in text ↑
Intervention effectobservedoriginal resultpositivemeasured

Claim · model-written summary

Delaying leaf removal from tasselling by 10 days decreased barrenness and lodging.

Taxon
maizeZea mayse0
Treatment
Delay in the time of leaf removal from the tasselling stage until 10 days latere3
Outcome
percentage of barrenness and lodginge3
Direction
decreasede3
Comparator
tasselling stagee3

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

Zea mays
Zea mays · TaxonAkwugo · CC BY-SA 4.0 · Wikimedia Commons ↗

Verbatim

e0

“studied in maize”

✓ located verbatim in the source · abstract, characters 61–77 · show in text ↑
e3

“Delay in the time of leaf removal from the tasselling stage until 10 days later increased yield, number of ears, ear length, diameter and test weight and decreased percentage of barrenness and lodging”

✓ located verbatim in the source · abstract, characters 481–681 · show in text ↑
Intervention effectobservedoriginal resultnegativemeasured

Claim · model-written summary

Leaf removal at tasselling adversely affected maize yield and yield components.

Taxon
maizeZea mayse0
Treatment
Leaf removale4
Outcome
yield and yield componentse4
Direction
adversely affectede4
Comparator
control (untreated) plantse5

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

Zea mays
Zea mays · TaxonAkwugo · CC BY-SA 4.0 · Wikimedia Commons ↗

Verbatim

e0

“studied in maize”

✓ located verbatim in the source · abstract, characters 61–77 · show in text ↑
e4

“Leaf removal adversely affected yield and yield components (number of ears, percentage of lodging, ear size and test weight of 1000 grains)”

✓ located verbatim in the source · abstract, characters 683–822 · show in text ↑
e5

“In control (untreated) plants”

✓ located verbatim in the source · abstract, characters 140–169 · show in text ↑
Intervention effectobservedoriginal resultmeasured

Claim · model-written summary

Complete leaf removal at tasselling delayed maize silking.

Taxon
maizeZea mayse0
Treatment
Complete leaf removale6
Outcome
silkinge6
Direction
delayede6
Comparator
control (untreated) plantse5

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

Zea mays
Zea mays · TaxonAkwugo · CC BY-SA 4.0 · Wikimedia Commons ↗

Verbatim

e0

“studied in maize”

✓ located verbatim in the source · abstract, characters 61–77 · show in text ↑
e6

“Complete leaf removal at tasselling time delayed silking and reduced lodging”

✓ located verbatim in the source · abstract, characters 824–900 · show in text ↑
e5

“In control (untreated) plants”

✓ located verbatim in the source · abstract, characters 140–169 · show in text ↑
Intervention effectobservedoriginal resultpositivemeasured

Claim · model-written summary

Complete leaf removal at tasselling reduced maize lodging.

Taxon
maizeZea mayse0
Treatment
Complete leaf removale6
Outcome
lodginge6
Direction
reducede6
Comparator
control (untreated) plantse5

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

Zea mays
Zea mays · TaxonAkwugo · CC BY-SA 4.0 · Wikimedia Commons ↗

Verbatim

e0

“studied in maize”

✓ located verbatim in the source · abstract, characters 61–77 · show in text ↑
e6

“Complete leaf removal at tasselling time delayed silking and reduced lodging”

✓ located verbatim in the source · abstract, characters 824–900 · show in text ↑
e5

“In control (untreated) plants”

✓ located verbatim in the source · abstract, characters 140–169 · show in text ↑

pruning · growth · Zea mays (maize)Results differ

63 papers: 29 positive, 34 negative or no effect

28 papers in the same direction as this paper · 34 in the opposite direction

  1. no effect
  2. negative
  3. negative

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pruning · quality: grain · Zea mays (maize)Positive and negative results

15 papers: 12 positive, 3 negative or no effect

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  1. no effect
  2. no effect
  3. no effect

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pruning · yield · Zea mays (maize)Positive and negative results

174 papers: 86 positive, 88 negative or no effect

85 papers in the same direction as this paper · 86 in the opposite direction · 2 reporting no difference from an alternative

  1. negative
  2. positive
  3. negative

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density · yield · Zea mays (maize)Positive and negative results

658 papers: 519 positive, 139 negative or no effect

138 papers in the same direction as this paper · 519 in the opposite direction

  1. positive
  2. positive
  3. positive

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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.