Paper · 2025 · Academia Biology

Chicken manure, chemical fertilizer and their combination affect yield and post-harvest shelf-life of carrot (Daucus carota L.)

Maxime Merlin Tonfack Djoufack; Eric Bertrand Kouam; Mariette Anoumaa; et al.

8
claims
16
verbatim quotes
2
citations
2
research areas
✓
Open access · cc-by

Abstract

Inadequate cultivation practices of carrots often result in lower yields. Proper soil fertilization combined with a good choice of variety can contribute to both qualitative and quantitative optimization of carrot production. Although several works have been carried out on carrots, there is still a lack of information regarding the influence of the types and doses of fertilizers applied in the field by farmers in Cameroon on yield and post-harvest shelf-life of the most frequently grown carrot varieties. This study aimed to determine the interactions between carrot variety and fertilization on the yield attributes and post-harvest conservation of carrots. Nine treatments involving individual and combined applications of chemical fertilizer (NPK: 20-10-10) and chicken manure were tested on five carrot varieties (New Kuroda, Pamela+, Madona, Amazonia, and Vanessa F1) in a split-split plot design with three replications. Yield variables were measured after 110 days of experimentation, followed by measurement of post-harvest shelf-life for thirty days. The best yield was obtained with 10 t ha−1 chicken manure. The variety Pamela+ was the most productive. This fertilizer/variety combination was identified as the best interaction for achieving optimal performance. The maximum storage time observed was 20 days. Application of chicken manure at 5 t ha−1 and 10 t ha−1 and the variety Vanessa F1 were associated with low percentages of deterioration. The best shelf-life was achieved with the variety Vanessa F1 fertilized with 5 t ha−1 of chicken manure, which showed the lowest deterioration (8.33% after 20 days of storage).

Abstract from the paper’s OpenAlex record; open copy licensed cc-by. Read at the source ↗

The text the model read, with the source record’s inline markup (italics, sub- and superscripts) rendered and its character entities decoded; quote offsets refer to the raw text.

Claims 8

Intervention effectobservedoriginal resultpositivemeasured

Claim · model-written summary

Chicken manure at 10 t ha−1 produced the best carrot yield.

Taxon
carrotDaucus carotat0
Treatment
10 t ha−1 chicken manuree0
Outcome
yielde0
Direction
beste0

Not reportedComparator

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

Daucus carota
Daucus carota · TaxonZeynel Cebeci · CC BY-SA 4.0 · Wikimedia Commons ↗

Verbatim

e0

“The best yield was obtained with 10 t ha−1 chicken manure.”

✓ located verbatim in the source · abstract, characters 1065–1123 · show in text ↑
t0

“carrot (Daucus carota L.)”

✓ located verbatim in the source · title, characters 102–127 · show in text ↑
Observationobservedoriginal resultpositivemeasured

Claim · model-written summary

Pamela+ was the most productive carrot variety.

Taxon
carrotDaucus carotat0
Material
Pamela+e0
Outcome
productivee0
Direction
moste0

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

Daucus carota
Daucus carota · TaxonZeynel Cebeci · CC BY-SA 4.0 · Wikimedia Commons ↗

Verbatim

e0

“The variety Pamela+ was the most productive.”

✓ located verbatim in the source · abstract, characters 1124–1168 · show in text ↑
t0

“carrot (Daucus carota L.)”

✓ located verbatim in the source · title, characters 102–127 · show in text ↑
Intervention effectobservedoriginal resultpositivemeasured

Claim · model-written summary

Pamela+ with 10 t ha−1 chicken manure was the best yield combination.

Taxon
carrotDaucus carotat0
Material
Pamela+e0
Treatment
10 t ha−1 chicken manuree0
Outcome
optimal performancee0
Direction
beste0

Not reportedComparator

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

Daucus carota
Daucus carota · TaxonZeynel Cebeci · CC BY-SA 4.0 · Wikimedia Commons ↗

Verbatim

e0

“The best yield was obtained with 10 t ha−1 chicken manure. The variety Pamela+ was the most productive. This fertilizer/variety combination was identified as the best interaction for achieving optimal performance.”

✓ located verbatim in the source · abstract, characters 1065–1278 · show in text ↑
t0

“carrot (Daucus carota L.)”

✓ located verbatim in the source · title, characters 102–127 · show in text ↑
Observationobservedoriginal resultmeasured

Claim · model-written summary

Maximum carrot storage time was 20 days.

Taxon
carrotDaucus carotat0
Outcome
storage timee0
Direction
maximume0
Value
20 dayse0

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

Daucus carota
Daucus carota · TaxonZeynel Cebeci · CC BY-SA 4.0 · Wikimedia Commons ↗

Verbatim

e0

“The maximum storage time observed was 20 days.”

✓ located verbatim in the source · abstract, characters 1279–1325 · show in text ↑
t0

“carrot (Daucus carota L.)”

✓ located verbatim in the source · title, characters 102–127 · show in text ↑
Associationobservedoriginal resultpositivemeasured

Claim · model-written summary

Chicken manure at 5 t ha−1 was associated with low deterioration.

Taxon
carrotDaucus carotat0
Treatment
chicken manure at 5 t ha−1e0
Outcome
percentages of deterioratione0
Direction
lowe0

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

Daucus carota
Daucus carota · TaxonZeynel Cebeci · CC BY-SA 4.0 · Wikimedia Commons ↗

Verbatim

e0

“Application of chicken manure at 5 t ha−1 and 10 t ha−1 and the variety Vanessa F1 were associated with low percentages of deterioration.”

✓ located verbatim in the source · abstract, characters 1326–1463 · show in text ↑
t0

“carrot (Daucus carota L.)”

✓ located verbatim in the source · title, characters 102–127 · show in text ↑
Associationobservedoriginal resultpositivemeasured

Claim · model-written summary

Chicken manure at 10 t ha−1 was associated with low deterioration.

Taxon
carrotDaucus carotat0
Treatment
10 t ha−1e0
Outcome
percentages of deterioratione0
Direction
lowe0

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

Daucus carota
Daucus carota · TaxonZeynel Cebeci · CC BY-SA 4.0 · Wikimedia Commons ↗

Verbatim

e0

“Application of chicken manure at 5 t ha−1 and 10 t ha−1 and the variety Vanessa F1 were associated with low percentages of deterioration.”

✓ located verbatim in the source · abstract, characters 1326–1463 · show in text ↑
t0

“carrot (Daucus carota L.)”

✓ located verbatim in the source · title, characters 102–127 · show in text ↑
Associationobservedoriginal resultpositivemeasured

Claim · model-written summary

Vanessa F1 was associated with low deterioration.

Taxon
carrotDaucus carotat0
Material
Vanessa F1e0
Outcome
percentages of deterioratione0
Direction
lowe0

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

Daucus carota
Daucus carota · TaxonZeynel Cebeci · CC BY-SA 4.0 · Wikimedia Commons ↗

Verbatim

e0

“Application of chicken manure at 5 t ha−1 and 10 t ha−1 and the variety Vanessa F1 were associated with low percentages of deterioration.”

✓ located verbatim in the source · abstract, characters 1326–1463 · show in text ↑
t0

“carrot (Daucus carota L.)”

✓ located verbatim in the source · title, characters 102–127 · show in text ↑
Intervention effectobservedoriginal resultpositivemeasured

Claim · model-written summary

Vanessa F1 with 5 t ha−1 chicken manure had the best shelf life and 8.33% deterioration after 20 days.

Taxon
carrotDaucus carotat0
Material
Vanessa F1e0
Treatment
5 t ha−1 of chicken manuree0
Outcome
deterioratione0
Direction
loweste0
Value
8.33%e0
Qualifier
after 20 days of storagee0

Not reportedComparator

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

Daucus carota
Daucus carota · TaxonZeynel Cebeci · CC BY-SA 4.0 · Wikimedia Commons ↗

Verbatim

e0

“The best shelf-life was achieved with the variety Vanessa F1 fertilized with 5 t ha−1 of chicken manure, which showed the lowest deterioration (8.33% after 20 days of storage).”

✓ located verbatim in the source · abstract, characters 1464–1640 · show in text ↑
t0

“carrot (Daucus carota L.)”

✓ located verbatim in the source · title, characters 102–127 · show in text ↑

fertilization · yield · Daucus carota (carrot)Results differ

121 papers: 108 positive, 13 negative or no effect

107 papers in the same direction as this paper · 11 in the opposite direction · 2 reporting no difference from an alternative

  1. positive
  2. positive
  3. positive

117 papers more in this group

See all 121 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.