Paper · 2006 · International Journal of Agriculture and Rural Development

Effects of tillage operations and plant density on leaf spot disease severity and grain yield of maize in ultisols

GO Ihejirika; MI Nwufo; EU Onweremadu; et al.

10
claims
20
verbatim quotes
0
citations
2
research areas
—
Not open access

Abstract

Two seasons experiments conducted in 2002 and 2003 revealed that Tillage operations significantly influenced leafspot disease severity; Percentage lodging 3.14; 2.08 and Grain yield 3.02; 3.84 in 2002 and 2003 respectively. Plant density also had significant difference on leafspot disease severity; Percentage lodging 4.82, 3.16 and Grain yield 4.00; 4.18 in 2002 and 2003 respectively. Spot tillage recorded low leafspot disease severity 0.94; 1.02 in comparison with Strip tillage 1.18; 1.30 when zero tillage (control) 2.28; 2.77 were high. 53,000 plants/ha recorded high leafspot disease severity 1.84, 1.95 in comparison with 26,666 plants/ha 1.05, 1.14 when 17,777 plants/ha 0.92; 1.00 were low in 2002 and 2003 respectively. Spot tillage recorded significantly highest grain yield 4.35; 4.72 tons/ha followed by strip 3.82; 4.02; when zero tillage 3.20; 3.66 were lowest. 53,000 plants/ha recorded high grain yield 4.51; 4.30 tons/ha in comparison with 26,666 plants/ha 2.48; 1.10 when 17,777 plants/ha 2.02; 1.95 were low in 2002 and 2003 respectively. International Journal of Agriculture and Rural Development Vol. 7(1) 2006: 33-36

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Claims 10

Intervention effectobservedoriginal resultsignificant (as stated)measured

Claim · model-written summary

Tillage significantly influenced maize leaf spot severity.

Taxon
maizeZea mayst0
Treatment
Tillage operationse0
Outcome
leafspot disease severitye0

Not reportedComparatorDirection

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

“Tillage operations significantly influenced leafspot disease severity”

✓ located verbatim in the source · abstract, characters 65–134 · show in text ↑
t0

“maize”

✓ located verbatim in the source · title, characters 97–102 · show in text ↑
Intervention effectobservedoriginal resultsignificant (as stated)measured

Claim · model-written summary

Tillage significantly influenced lodging.

Taxon
maizeZea mayst0
Treatment
Tillage operationse0
Outcome
Percentage lodginge0
Value
3.14; 2.08e0

Not reportedComparatorDirection

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

“Tillage operations significantly influenced leafspot disease severity; Percentage lodging 3.14; 2.08 and Grain yield 3.02; 3.84 in 2002 and 2003 respectively”

✓ located verbatim in the source · abstract, characters 65–222 · show in text ↑
t0

“maize”

✓ located verbatim in the source · title, characters 97–102 · show in text ↑
Intervention effectobservedoriginal resultsignificant (as stated)measured

Claim · model-written summary

Tillage significantly influenced grain yield.

Taxon
maizeZea mayst0
Treatment
Tillage operationse0
Outcome
Grain yielde0
Value
3.02; 3.84e0

Not reportedComparatorDirection

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

“Tillage operations significantly influenced leafspot disease severity; Percentage lodging 3.14; 2.08 and Grain yield 3.02; 3.84 in 2002 and 2003 respectively”

✓ located verbatim in the source · abstract, characters 65–222 · show in text ↑
t0

“maize”

✓ located verbatim in the source · title, characters 97–102 · show in text ↑
Intervention effectobservedoriginal resultsignificant (as stated)measured

Claim · model-written summary

Plant density significantly affected leaf spot severity.

Taxon
maizeZea mayst0
Treatment
Plant densitye0
Outcome
leafspot disease severitye0

Not reportedComparatorDirection

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

“Plant density also had significant difference on leafspot disease severity”

✓ located verbatim in the source · abstract, characters 224–298 · show in text ↑
t0

“maize”

✓ located verbatim in the source · title, characters 97–102 · show in text ↑
Intervention effectobservedoriginal resultsignificant (as stated)measured

Claim · model-written summary

Plant density significantly affected lodging.

Taxon
maizeZea mayst0
Treatment
Plant densitye0
Outcome
Percentage lodginge0
Value
4.82, 3.16e0

Not reportedComparatorDirection

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

“Plant density also had significant difference on leafspot disease severity; Percentage lodging 4.82, 3.16 and Grain yield 4.00; 4.18 in 2002 and 2003 respectively”

✓ located verbatim in the source · abstract, characters 224–386 · show in text ↑
t0

“maize”

✓ located verbatim in the source · title, characters 97–102 · show in text ↑
Intervention effectobservedoriginal resultsignificant (as stated)measured

Claim · model-written summary

Plant density significantly affected grain yield.

Taxon
maizeZea mayst0
Treatment
Plant densitye0
Outcome
Grain yielde0
Value
4.00; 4.18e0

Not reportedComparatorDirection

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

“Plant density also had significant difference on leafspot disease severity; Percentage lodging 4.82, 3.16 and Grain yield 4.00; 4.18 in 2002 and 2003 respectively”

✓ located verbatim in the source · abstract, characters 224–386 · show in text ↑
t0

“maize”

✓ located verbatim in the source · title, characters 97–102 · show in text ↑
Intervention effectobservedoriginal resultpositivemeasured

Claim · model-written summary

Spot tillage had lower leaf spot severity than strip and zero tillage.

Taxon
maizeZea mayst0
Treatment
Spot tillagee0
Outcome
leafspot disease severitye0
Direction
lowe0
Value
0.94; 1.02e0
Comparator
Strip tillagee0

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

“Spot tillage recorded low leafspot disease severity 0.94; 1.02 in comparison with Strip tillage 1.18; 1.30 when zero tillage (control) 2.28; 2.77 were high”

✓ located verbatim in the source · abstract, characters 388–543 · show in text ↑
t0

“maize”

✓ located verbatim in the source · title, characters 97–102 · show in text ↑
Intervention effectobservedoriginal resultnegativemeasured

Claim · model-written summary

The highest density had higher leaf spot severity than lower densities.

Taxon
maizeZea mayst0
Treatment
53,000 plants/hae0
Outcome
leafspot disease severitye0
Direction
highe0
Value
1.84, 1.95e0
Comparator
26,666 plants/hae0

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

“53,000 plants/ha recorded high leafspot disease severity 1.84, 1.95 in comparison with 26,666 plants/ha 1.05, 1.14 when 17,777 plants/ha 0.92; 1.00 were low in 2002 and 2003 respectively”

✓ located verbatim in the source · abstract, characters 545–731 · show in text ↑
t0

“maize”

✓ located verbatim in the source · title, characters 97–102 · show in text ↑
Intervention effectobservedoriginal resultpositivesignificant (as stated)measured

Claim · model-written summary

Spot tillage produced the highest grain yield.

Taxon
maizeZea mayst0
Treatment
Spot tillagee0
Outcome
grain yielde0
Direction
higheste0
Value
4.35; 4.72 tons/hae0
Comparator
zero tillagee0

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

“Spot tillage recorded significantly highest grain yield 4.35; 4.72 tons/ha followed by strip 3.82; 4.02; when zero tillage 3.20; 3.66 were lowest”

✓ located verbatim in the source · abstract, characters 733–878 · show in text ↑
t0

“maize”

✓ located verbatim in the source · title, characters 97–102 · show in text ↑
Intervention effectobservedoriginal resultpositivemeasured

Claim · model-written summary

The highest density produced higher grain yield than lower densities.

Taxon
maizeZea mayst0
Treatment
53,000 plants/hae0
Outcome
grain yielde0
Direction
highe0
Value
4.51; 4.30 tons/hae0
Comparator
26,666 plants/hae0

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

“53,000 plants/ha recorded high grain yield 4.51; 4.30 tons/ha in comparison with 26,666 plants/ha 2.48; 1.10 when 17,777 plants/ha 2.02; 1.95 were low in 2002 and 2003 respectively”

✓ located verbatim in the source · abstract, characters 880–1060 · show in text ↑
t0

“maize”

✓ located verbatim in the source · title, characters 97–102 · show in text ↑

tillage · disease · Zea mays (maize)Positive and negative results

54 papers: 33 positive, 21 negative or no effect

32 papers in the same direction as this paper · 18 in the opposite direction · 3 reporting no difference from an alternative

  1. negative
  2. negative
  3. negative

50 papers more in this group

See all 54 papers →

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

1,099 papers: 812 positive, 287 negative or no effect

811 papers in the same direction as this paper · 230 in the opposite direction · 57 reporting no difference from an alternative

  1. no effect
  2. negative
  3. no effect

1,095 papers more in this group

See all 1,099 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.