Paper · 2006 · Journal of Radiological Protection

Effect of gamma irradiation on the grain yield of NigerianZea maysandArachis hypogaea

C E Mokobia; E M Okpakorese; C Analogbei; et al.

7
claims
14
verbatim quotes
5
citations
2
research areas
—
Not open access

Abstract

As a follow-up to our earlier investigation on the effect of gamma radiation on the germination and growth of certain Nigerian agricultural crops, the present study sought to determine the effect of gamma radiation on the grain yield of Zea mays (maize) and Arachis hypogaea (groundnut). The seeds were planted after irradiation without the application of fertiliser. The results show that for maize, grain yield for irradiated samples is increased to levels above the unirradiated yield at doses up to about 250 Gy with the optimum yield occurring at 150 Gy. The corresponding increase for groundnut is observed at doses up to about 930 Gy with optimum yield at a dose of 300 Gy. Inhibition in yield was observed to set in at a dose greater than 250 Gy for maize and 930 Gy for groundnut. The actual relationship between mean yield of these crops and gamma radiation dose was obtained using sixth-degree polynomial equations.

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Claims 7

Intervention effectobservedoriginal resultpositivemeasured

Claim · model-written summary

Irradiated maize grain yield exceeded unirradiated yield up to about 250 Gy.

Taxon
maizeZea mayse0
Treatment
irradiatede0
Outcome
grain yielde0
Direction
increasede0
Qualifier
doses up to about 250 Gye0
Comparator
unirradiatede0

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

“for maize, grain yield for irradiated samples is increased to levels above the unirradiated yield at doses up to about 250 Gy”

✓ located verbatim in the source · abstract, characters 390–515 · show in text ↑
Observationobservedoriginal resultpositivemeasured

Claim · model-written summary

Maize optimum yield occurred at 150 Gy.

Taxon
maizeZea mayse1
Outcome
optimum yielde0
Direction
optimume0
Value
150 Gye0

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

“the optimum yield occurring at 150 Gy.”

✓ located verbatim in the source · abstract, characters 521–559 · show in text ↑
t0

“Zea mays”

✓ located verbatim in the source · title, characters 58–66 · show in text ↑
e1

“for maize, grain yield for irradiated samples is increased to levels above the unirradiated yield at doses up to about 250 Gy”

✓ located verbatim in the source · abstract, characters 390–515 · show in text ↑
Intervention effectobservedoriginal resultpositivemeasured

Claim · model-written summary

Irradiated groundnut yield exceeded unirradiated yield up to about 930 Gy.

Taxon
groundnutArachis hypogaeae0
Treatment
gamma radiatione1
Outcome
yielde0
Direction
increasee0
Qualifier
doses up to about 930 Gye0

Not reportedComparator

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

Arachis hypogaea
Arachis hypogaea · Taxon葉子 · CC0 · iNaturalist ↗

Verbatim

e0

“The corresponding increase for groundnut is observed at doses up to about 930 Gy with optimum yield at a dose of 300 Gy.”

✓ located verbatim in the source · abstract, characters 560–680 · show in text ↑
t0

“gamma irradiation”

✓ located verbatim in the source · title, characters 10–27 · show in text ↑
e1

“gamma radiation on the grain yield of Zea mays (maize) and Arachis hypogaea (groundnut)”

✓ located verbatim in the source · abstract, characters 199–286 · show in text ↑
Observationobservedoriginal resultpositivemeasured

Claim · model-written summary

Groundnut optimum yield occurred at 300 Gy.

Taxon
groundnutArachis hypogaeae1
Outcome
optimum yielde0
Direction
optimume0
Value
300 Gye0

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

Arachis hypogaea
Arachis hypogaea · Taxon葉子 · CC0 · iNaturalist ↗

Verbatim

e0

“optimum yield at a dose of 300 Gy.”

✓ located verbatim in the source · abstract, characters 646–680 · show in text ↑
t0

“Arachis hypogaea”

✓ located verbatim in the source · title, characters 69–85 · show in text ↑
e1

“The corresponding increase for groundnut is observed at doses up to about 930 Gy”

✓ located verbatim in the source · abstract, characters 560–640 · show in text ↑
Intervention effectobservedoriginal resultnegativemeasured

Claim · model-written summary

Maize yield inhibition set in above 250 Gy.

Taxon
maizeZea mayse0
Treatment
dose greater than 250 Gye0
Outcome
yielde0
Direction
Inhibitione0

Not reportedComparator

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

“Inhibition in yield was observed to set in at a dose greater than 250 Gy for maize”

✓ located verbatim in the source · abstract, characters 681–763 · show in text ↑
Intervention effectobservedoriginal resultnegativemeasured

Claim · model-written summary

Groundnut yield inhibition set in above 930 Gy.

Taxon
groundnutArachis hypogaeae0
Treatment
930 Gye0
Outcome
yielde0
Direction
Inhibitione0

Not reportedComparator

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

Arachis hypogaea
Arachis hypogaea · Taxon葉子 · CC0 · iNaturalist ↗

Verbatim

e0

“Inhibition in yield was observed to set in at a dose greater than 250 Gy for maize and 930 Gy for groundnut.”

✓ located verbatim in the source · abstract, characters 681–789 · show in text ↑
Method / resourceobservedoriginal resultmeasured

Claim · model-written summary

Sixth-degree polynomial equations described mean yield versus gamma dose in both crops.

Taxon
Zea maysZea mayst0
Outcome
relationship between mean yield of these crops and gamma radiation dosee0

Not reportedComparatorValue

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

“The actual relationship between mean yield of these crops and gamma radiation dose was obtained using sixth-degree polynomial equations.”

✓ located verbatim in the source · abstract, characters 790–926 · show in text ↑
t0

“Zea mays”

✓ located verbatim in the source · title, characters 58–66 · show in text ↑

radiation · yield · Arachis hypogaea (peanut)Positive and negative results

11 papers: 7 positive, 4 negative or no effect

6 papers in the same direction as this paper · 4 in the opposite direction

  1. negative
  2. negative
  3. no effect

7 papers more in this group

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

17 papers: 10 positive, 7 negative or no effect

9 papers in the same direction as this paper · 6 in the opposite direction · 1 reporting no difference from an alternative

  1. negative
  2. negative
  3. negative

13 papers more in this group

See all 17 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.