Paper · 2006 · AFRICAN JOURNAL OF BIOTECHNOLOGY

Influence of poultry manure and NPK fertilizer on yield and yield components of crops under different cropping systems in south west Nigeria

OT Ayoola; O. N. Adeniyan

9
claims
19
verbatim quotes
102
citations
1
research areas
✓
Open access

Abstract

Field experiments were conducted in two villages (Oniyo and Moloko Ashipa) representing two agro ecologies in the south west area of Nigeria during 2000 and 2001 cropping seasons. The objective was to determine the effects of NPK fertilizer and poultry manure on the yield and yield components in cassava/maize/melon systems. The factors were (1) cropping systems: cassava/maize/melon, sole cassava, sole maize and sole melon; and (2) fertilizers: no fertilizer, NPK 15-15-15 (400 kg/ha), poultry manure (5 t/ha), 2.5 t/ha poultry manure + 200 kg/ha NPK 15-15-15 and mineral fertilizer (NPK 15-15-15). Intercropping had no significant effect on cassava root yield but it reduced maize and melon seed yield compared to sole cropping. Land equivalent ratio (LER) values were however higher under intercropping than sole cropping. Crop yields were statistically the same under NPK alone and NPK + poultry manure but significantly higher than both poultry manure alone and control in both locations

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Claims 9

Intervention effectobservedoriginal resultno effectnot significant (as stated)measured

Claim · model-written summary

Intercropping did not significantly change cassava root yield.

Treatment
Intercroppinge0
Outcome
root yielde0
Direction
no significant effecte0
Comparator
sole cassavae1

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

Manihot esculenta
Manihot esculenta · Taxon葉子 · CC0 · iNaturalist ↗

Verbatim

e0

“Intercropping had no significant effect on cassava root yield”

✓ located verbatim in the source · abstract, characters 602–663 · show in text ↑
e1

“sole cassava”

✓ located verbatim in the source · abstract, characters 386–398 · show in text ↑
Intervention effectobservedoriginal resultnegativemeasured

Claim · model-written summary

Intercropping reduced maize seed yield relative to sole cropping.

Taxon
maizeZea mayse0
Treatment
Intercroppinge1
Outcome
seed yielde0
Direction
reducede0
Comparator
sole croppinge0

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

“it reduced maize and melon seed yield compared to sole cropping”

✓ located verbatim in the source · abstract, characters 668–731 · show in text ↑
e1

“Intercropping had no significant effect”

✓ located verbatim in the source · abstract, characters 602–641 · show in text ↑
Intervention effectobservedoriginal resultnegativemeasured

Claim · model-written summary

Intercropping reduced melon seed yield relative to sole cropping.

Taxon
melonCucumis meloe0
Treatment
Intercroppinge1
Outcome
melon seed yielde0
Direction
reducede0
Comparator
sole croppinge0

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

Cucumis melo
Cucumis melo · TaxonUSDA photo by Scott Bauer. Image Number K7355-11. · Public domain · Wikimedia Commons ↗

Verbatim

e0

“it reduced maize and melon seed yield compared to sole cropping”

✓ located verbatim in the source · abstract, characters 668–731 · show in text ↑
e1

“Intercropping had no significant effect”

✓ located verbatim in the source · abstract, characters 602–641 · show in text ↑
Intervention effectobservedoriginal resultpositivemeasured

Claim · model-written summary

Land equivalent ratios were higher under intercropping than sole cropping.

Treatment
intercroppinge0
Outcome
Land equivalent ratio (LER) valuese0
Direction
highere0
Comparator
sole croppinge0

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

Cucumis melo
Cucumis melo · TaxonUSDA photo by Scott Bauer. Image Number K7355-11. · Public domain · Wikimedia Commons ↗
Manihot esculenta
Manihot esculenta · Taxon葉子 · CC0 · iNaturalist ↗
Zea mays
Zea mays · TaxonAkwugo · CC BY-SA 4.0 · Wikimedia Commons ↗

Verbatim

e0

“Land equivalent ratio (LER) values were however higher under intercropping than sole cropping”

✓ located verbatim in the source · abstract, characters 733–826 · show in text ↑
t0

“crops under different cropping systems”

✓ located verbatim in the source · title, characters 80–118 · show in text ↑
t1

“cassava/maize/melon systems”

✓ located verbatim in the source · abstract, characters 297–324 · show in text ↑
Intervention effectobservedoriginal resultno effectnot significant (as stated)measured

Claim · model-written summary

Crop yields were statistically the same under NPK alone and NPK plus poultry manure.

Treatment
NPK alonee0
Outcome
Crop yieldse0
Direction
statistically the samee0
Comparator
NPK + poultry manuree0

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

Cucumis melo
Cucumis melo · TaxonUSDA photo by Scott Bauer. Image Number K7355-11. · Public domain · Wikimedia Commons ↗
Manihot esculenta
Manihot esculenta · Taxon葉子 · CC0 · iNaturalist ↗
Zea mays
Zea mays · TaxonAkwugo · CC BY-SA 4.0 · Wikimedia Commons ↗

Verbatim

e0

“Crop yields were statistically the same under NPK alone and NPK + poultry manure”

✓ located verbatim in the source · abstract, characters 828–908 · show in text ↑
e1

“cassava/maize/melon systems”

✓ located verbatim in the source · abstract, characters 297–324 · show in text ↑
Intervention effectobservedoriginal resultpositivesignificant (as stated)measured

Claim · model-written summary

NPK alone produced higher crop yields than poultry manure alone in both locations.

Treatment
NPK alonee0
Outcome
Crop yieldse0
Direction
highere0
Comparator
poultry manure alonee0
Setting
both locationse0

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

Cucumis melo
Cucumis melo · TaxonUSDA photo by Scott Bauer. Image Number K7355-11. · Public domain · Wikimedia Commons ↗
Manihot esculenta
Manihot esculenta · Taxon葉子 · CC0 · iNaturalist ↗
Zea mays
Zea mays · TaxonAkwugo · CC BY-SA 4.0 · Wikimedia Commons ↗

Verbatim

e0

“Crop yields were statistically the same under NPK alone and NPK + poultry manure but significantly higher than both poultry manure alone and control in both locations”

✓ located verbatim in the source · abstract, characters 828–994 · show in text ↑
e1

“cassava/maize/melon systems”

✓ located verbatim in the source · abstract, characters 297–324 · show in text ↑
Intervention effectobservedoriginal resultpositivesignificant (as stated)measured

Claim · model-written summary

NPK alone produced higher crop yields than control in both locations.

Treatment
NPK alonee0
Outcome
Crop yieldse0
Direction
highere0
Comparator
controle0
Setting
both locationse0

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

Cucumis melo
Cucumis melo · TaxonUSDA photo by Scott Bauer. Image Number K7355-11. · Public domain · Wikimedia Commons ↗
Manihot esculenta
Manihot esculenta · Taxon葉子 · CC0 · iNaturalist ↗
Zea mays
Zea mays · TaxonAkwugo · CC BY-SA 4.0 · Wikimedia Commons ↗

Verbatim

e0

“Crop yields were statistically the same under NPK alone and NPK + poultry manure but significantly higher than both poultry manure alone and control in both locations”

✓ located verbatim in the source · abstract, characters 828–994 · show in text ↑
e1

“cassava/maize/melon systems”

✓ located verbatim in the source · abstract, characters 297–324 · show in text ↑
Intervention effectobservedoriginal resultpositivesignificant (as stated)measured

Claim · model-written summary

NPK plus poultry manure produced higher crop yields than poultry manure alone in both locations.

Treatment
NPK + poultry manuree0
Outcome
Crop yieldse0
Direction
highere0
Comparator
poultry manure alonee0
Setting
both locationse0

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

Cucumis melo
Cucumis melo · TaxonUSDA photo by Scott Bauer. Image Number K7355-11. · Public domain · Wikimedia Commons ↗
Manihot esculenta
Manihot esculenta · Taxon葉子 · CC0 · iNaturalist ↗
Zea mays
Zea mays · TaxonAkwugo · CC BY-SA 4.0 · Wikimedia Commons ↗

Verbatim

e0

“Crop yields were statistically the same under NPK alone and NPK + poultry manure but significantly higher than both poultry manure alone and control in both locations”

✓ located verbatim in the source · abstract, characters 828–994 · show in text ↑
e1

“cassava/maize/melon systems”

✓ located verbatim in the source · abstract, characters 297–324 · show in text ↑
Intervention effectobservedoriginal resultpositivesignificant (as stated)measured

Claim · model-written summary

NPK plus poultry manure produced higher crop yields than control in both locations.

Treatment
NPK + poultry manuree0
Outcome
Crop yieldse0
Direction
highere0
Comparator
controle0
Setting
both locationse0

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

Cucumis melo
Cucumis melo · TaxonUSDA photo by Scott Bauer. Image Number K7355-11. · Public domain · Wikimedia Commons ↗
Manihot esculenta
Manihot esculenta · Taxon葉子 · CC0 · iNaturalist ↗
Zea mays
Zea mays · TaxonAkwugo · CC BY-SA 4.0 · Wikimedia Commons ↗

Verbatim

e0

“Crop yields were statistically the same under NPK alone and NPK + poultry manure but significantly higher than both poultry manure alone and control in both locations”

✓ located verbatim in the source · abstract, characters 828–994 · show in text ↑
e1

“cassava/maize/melon systems”

✓ located verbatim in the source · abstract, characters 297–324 · show in text ↑

intercropping · yield · Manihot esculenta (cassava)Results differ

78 papers: 48 positive, 30 negative or no effect

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

  1. negative
  2. negative
  3. no effect

74 papers more in this group

See all 78 papers →

fertilization · yield · Cucumis melo (muskmelon)Results differ

95 papers: 72 positive, 23 negative or no effect

71 papers in the same direction as this paper · 18 in the opposite direction · 5 reporting no difference from an alternative

  1. positive
  2. no effect
  3. no effect

91 papers more in this group

See all 95 papers →

intercropping · yield · Cucumis melo (muskmelon)Positive and negative results

13 papers: 7 positive, 6 negative or no effect

6 papers in the same direction as this paper · 5 in the opposite direction · 1 reporting no difference from an alternative

  1. negative
  2. negative
  3. negative

9 papers more in this group

See all 13 papers →

fertilization · yield · Manihot esculenta (cassava)Positive and negative results

153 papers: 141 positive, 12 negative or no effect

140 papers in the same direction as this paper · 10 in the opposite direction · 2 reporting no difference from an alternative

  1. positive
  2. positive
  3. negative

149 papers more in this group

See all 153 papers →

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

834 papers: 613 positive, 221 negative or no effect

612 papers in the same direction as this paper · 181 in the opposite direction · 40 reporting no difference from an alternative

  1. negative
  2. positive
  3. no effect

830 papers more in this group

See all 834 papers →

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

3,908 papers: 3,485 positive, 423 negative or no effect

3,484 papers in the same direction as this paper · 338 in the opposite direction · 85 reporting no difference from an alternative

  1. positive
  2. positive
  3. positive

3,904 papers more in this group

See all 3,908 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.