Nigella sativa 1,664 claims

species · family Ranunculaceae · green plant · NCBI Taxonomy ↗

Common name: black cumin — Also written in claims: black cumin · black cumin plant · black cumin plants · Black caraway · black cumin seeds · black cumin species

31 spellings

Questions studied on this organism40 questions67 papers

Nigella sativaAndreHolz at English Wikipedia · CC BY-SA 3.0 · Wikimedia Commons ↗

1,664 claims

Open in search (filters, sorting) →

Associationobservedoriginal resultpositivesignificant (as stated)measured

Claim · model-written summary

Family size, crop rotation and variety type significantly and favorably affected black cumin productivity.

Taxon: Nigella sativaNigella sativat0
Treatment: family size, crop rotation, variety typee1
Outcome: black cumin productivitye1
Direction: favorably impactede1
Setting: North and Northeastern Ethiopiae2

Verbatim

t0
“Black Cumin ( Nigella sativa L.)”
✓ located verbatim in the source · title, characters 14–46

e1
“black cumin productivity is significantly and favorably impacted by family size, crop rotation, variety type, product market price, and training variables”
✓ located verbatim in the source · abstract, characters 1431–1585

e2
“The survey was carried out in six districts and three zones in North and Northeastern Ethiopia”
✓ located verbatim in the source · abstract, characters 138–232

Title

Assessment of Black Cumin ( Nigella sativa L.) Production and Productivity Influencing Factors in North and Northeastern Ethiopia

Solomon Kassaye Ejigu; Ermias Lulekal Molla; Wosene Gebreselassie Abtew Journal of Food Quality 2026. doi:10.1155/jfq/6615903

Other claims from this paper (10)

Association Product market price and training variables significantly and favorably affected black cumin productivity.
Association Household head age had a significant negative effect on black cumin productivity.
Observation About 62% of black cumin crops were rotated with other crops.
Observation About 44% of black cumin crops were interplanted with other crops.
Observation 54% of respondents planted black cumin in undulating farmland.
Observation 46% of respondents planted black cumin in a plain.
Observation 36% of respondents farmed black cumin using improved varieties.
Observation About 42% of black cumin farms were impacted by pests.
Observation About 79% of respondents sold black cumin seed at high prices.
Observation About 21% of respondents sold black cumin seed at low prices.

Associationobservedoriginal resultpositivesignificant (as stated)measured

Claim · model-written summary

Product market price and training variables significantly and favorably affected black cumin productivity.

Taxon: Nigella sativaNigella sativat0
Treatment: product market price, and training variablese1
Outcome: black cumin productivitye1
Direction: favorably impactede1

Verbatim

t0
“Black Cumin ( Nigella sativa L.)”
✓ located verbatim in the source · title, characters 14–46

e1
“black cumin productivity is significantly and favorably impacted by family size, crop rotation, variety type, product market price, and training variables”
✓ located verbatim in the source · abstract, characters 1431–1585

Title

Assessment of Black Cumin ( Nigella sativa L.) Production and Productivity Influencing Factors in North and Northeastern Ethiopia

Solomon Kassaye Ejigu; Ermias Lulekal Molla; Wosene Gebreselassie Abtew Journal of Food Quality 2026. doi:10.1155/jfq/6615903

Other claims from this paper (10)

Association Family size, crop rotation and variety type significantly and favorably affected black cumin productivity.
Association Household head age had a significant negative effect on black cumin productivity.
Observation About 62% of black cumin crops were rotated with other crops.
Observation About 44% of black cumin crops were interplanted with other crops.
Observation 54% of respondents planted black cumin in undulating farmland.
Observation 46% of respondents planted black cumin in a plain.
Observation 36% of respondents farmed black cumin using improved varieties.
Observation About 42% of black cumin farms were impacted by pests.
Observation About 79% of respondents sold black cumin seed at high prices.
Observation About 21% of respondents sold black cumin seed at low prices.

Associationobservedoriginal resultnegativesignificant (as stated)measured

Claim · model-written summary

Household head age had a significant negative effect on black cumin productivity.

Taxon: Nigella sativaNigella sativat0
Treatment: household head agee3
Outcome: black cumin productivitye1
Direction: negative impacte3

Verbatim

t0
“Black Cumin ( Nigella sativa L.)”
✓ located verbatim in the source · title, characters 14–46

e1
“black cumin productivity is significantly and favorably impacted by family size, crop rotation, variety type, product market price, and training variables”
✓ located verbatim in the source · abstract, characters 1431–1585

e3
“household head age had a significant negative impact”
✓ located verbatim in the source · abstract, characters 1593–1645

Title

Assessment of Black Cumin ( Nigella sativa L.) Production and Productivity Influencing Factors in North and Northeastern Ethiopia

Solomon Kassaye Ejigu; Ermias Lulekal Molla; Wosene Gebreselassie Abtew Journal of Food Quality 2026. doi:10.1155/jfq/6615903

Other claims from this paper (10)

Association Family size, crop rotation and variety type significantly and favorably affected black cumin productivity.
Association Product market price and training variables significantly and favorably affected black cumin productivity.
Observation About 62% of black cumin crops were rotated with other crops.
Observation About 44% of black cumin crops were interplanted with other crops.
Observation 54% of respondents planted black cumin in undulating farmland.
Observation 46% of respondents planted black cumin in a plain.
Observation 36% of respondents farmed black cumin using improved varieties.
Observation About 42% of black cumin farms were impacted by pests.
Observation About 79% of respondents sold black cumin seed at high prices.
Observation About 21% of respondents sold black cumin seed at low prices.

Observationobservedoriginal resultmeasured

Claim · model-written summary

About 62% of black cumin crops were rotated with other crops.

Taxon: Nigella sativaNigella sativat0
Outcome: black cumin crops were rotatede4
Value: 62%e4

Verbatim

t0
“Black Cumin ( Nigella sativa L.)”
✓ located verbatim in the source · title, characters 14–46

e4
“Approximately 62% and 44% of black cumin crops were rotated and interplanted with other crops, respectively”
✓ located verbatim in the source · abstract, characters 902–1009

Title

Assessment of Black Cumin ( Nigella sativa L.) Production and Productivity Influencing Factors in North and Northeastern Ethiopia

Solomon Kassaye Ejigu; Ermias Lulekal Molla; Wosene Gebreselassie Abtew Journal of Food Quality 2026. doi:10.1155/jfq/6615903

Other claims from this paper (10)

Association Family size, crop rotation and variety type significantly and favorably affected black cumin productivity.
Association Product market price and training variables significantly and favorably affected black cumin productivity.
Association Household head age had a significant negative effect on black cumin productivity.
Observation About 44% of black cumin crops were interplanted with other crops.
Observation 54% of respondents planted black cumin in undulating farmland.
Observation 46% of respondents planted black cumin in a plain.
Observation 36% of respondents farmed black cumin using improved varieties.
Observation About 42% of black cumin farms were impacted by pests.
Observation About 79% of respondents sold black cumin seed at high prices.
Observation About 21% of respondents sold black cumin seed at low prices.

Observationobservedoriginal resultmeasured

Claim · model-written summary

About 44% of black cumin crops were interplanted with other crops.

Taxon: Nigella sativaNigella sativat0
Outcome: interplanted with other cropse4
Value: 44%e4

Verbatim

t0
“Black Cumin ( Nigella sativa L.)”
✓ located verbatim in the source · title, characters 14–46

e4
“Approximately 62% and 44% of black cumin crops were rotated and interplanted with other crops, respectively”
✓ located verbatim in the source · abstract, characters 902–1009

Title

Assessment of Black Cumin ( Nigella sativa L.) Production and Productivity Influencing Factors in North and Northeastern Ethiopia

Solomon Kassaye Ejigu; Ermias Lulekal Molla; Wosene Gebreselassie Abtew Journal of Food Quality 2026. doi:10.1155/jfq/6615903

Other claims from this paper (10)

Association Family size, crop rotation and variety type significantly and favorably affected black cumin productivity.
Association Product market price and training variables significantly and favorably affected black cumin productivity.
Association Household head age had a significant negative effect on black cumin productivity.
Observation About 62% of black cumin crops were rotated with other crops.
Observation 54% of respondents planted black cumin in undulating farmland.
Observation 46% of respondents planted black cumin in a plain.
Observation 36% of respondents farmed black cumin using improved varieties.
Observation About 42% of black cumin farms were impacted by pests.
Observation About 79% of respondents sold black cumin seed at high prices.
Observation About 21% of respondents sold black cumin seed at low prices.

Observationobservedoriginal resultmeasured

Claim · model-written summary

54% of respondents planted black cumin in undulating farmland.

Taxon: Nigella sativaNigella sativat0
Outcome: planted black cumin in undulating farmlande5
Value: 54%e5

Verbatim

t0
“Black Cumin ( Nigella sativa L.)”
✓ located verbatim in the source · title, characters 14–46

e5
“54% of respondents planted black cumin in undulating farmland, while 46% planted it in a plain”
✓ located verbatim in the source · abstract, characters 1055–1149

Title

Assessment of Black Cumin ( Nigella sativa L.) Production and Productivity Influencing Factors in North and Northeastern Ethiopia

Solomon Kassaye Ejigu; Ermias Lulekal Molla; Wosene Gebreselassie Abtew Journal of Food Quality 2026. doi:10.1155/jfq/6615903

Other claims from this paper (10)

Association Family size, crop rotation and variety type significantly and favorably affected black cumin productivity.
Association Product market price and training variables significantly and favorably affected black cumin productivity.
Association Household head age had a significant negative effect on black cumin productivity.
Observation About 62% of black cumin crops were rotated with other crops.
Observation About 44% of black cumin crops were interplanted with other crops.
Observation 46% of respondents planted black cumin in a plain.
Observation 36% of respondents farmed black cumin using improved varieties.
Observation About 42% of black cumin farms were impacted by pests.
Observation About 79% of respondents sold black cumin seed at high prices.
Observation About 21% of respondents sold black cumin seed at low prices.

Observationobservedoriginal resultmeasured

Claim · model-written summary

46% of respondents planted black cumin in a plain.

Taxon: Nigella sativaNigella sativat0
Outcome: planted it in a plaine5
Value: 46%e5

Verbatim

t0
“Black Cumin ( Nigella sativa L.)”
✓ located verbatim in the source · title, characters 14–46

e5
“54% of respondents planted black cumin in undulating farmland, while 46% planted it in a plain”
✓ located verbatim in the source · abstract, characters 1055–1149

Title

Assessment of Black Cumin ( Nigella sativa L.) Production and Productivity Influencing Factors in North and Northeastern Ethiopia

Solomon Kassaye Ejigu; Ermias Lulekal Molla; Wosene Gebreselassie Abtew Journal of Food Quality 2026. doi:10.1155/jfq/6615903

Other claims from this paper (10)

Association Family size, crop rotation and variety type significantly and favorably affected black cumin productivity.
Association Product market price and training variables significantly and favorably affected black cumin productivity.
Association Household head age had a significant negative effect on black cumin productivity.
Observation About 62% of black cumin crops were rotated with other crops.
Observation About 44% of black cumin crops were interplanted with other crops.
Observation 54% of respondents planted black cumin in undulating farmland.
Observation 36% of respondents farmed black cumin using improved varieties.
Observation About 42% of black cumin farms were impacted by pests.
Observation About 79% of respondents sold black cumin seed at high prices.
Observation About 21% of respondents sold black cumin seed at low prices.

Observationobservedoriginal resultmeasured

Claim · model-written summary

36% of respondents farmed black cumin using improved varieties.

Taxon: Nigella sativaNigella sativat0
Outcome: farmed black cumin using improved varietiese6
Value: 36%e6

Verbatim

t0
“Black Cumin ( Nigella sativa L.)”
✓ located verbatim in the source · title, characters 14–46

e6
“36% of respondents’ farmed black cumin using improved varieties”
✓ located verbatim in the source · abstract, characters 1165–1228

Title

Assessment of Black Cumin ( Nigella sativa L.) Production and Productivity Influencing Factors in North and Northeastern Ethiopia

Solomon Kassaye Ejigu; Ermias Lulekal Molla; Wosene Gebreselassie Abtew Journal of Food Quality 2026. doi:10.1155/jfq/6615903

Other claims from this paper (10)

Association Family size, crop rotation and variety type significantly and favorably affected black cumin productivity.
Association Product market price and training variables significantly and favorably affected black cumin productivity.
Association Household head age had a significant negative effect on black cumin productivity.
Observation About 62% of black cumin crops were rotated with other crops.
Observation About 44% of black cumin crops were interplanted with other crops.
Observation 54% of respondents planted black cumin in undulating farmland.
Observation 46% of respondents planted black cumin in a plain.
Observation About 42% of black cumin farms were impacted by pests.
Observation About 79% of respondents sold black cumin seed at high prices.
Observation About 21% of respondents sold black cumin seed at low prices.

Observationobservedoriginal resultmeasured

Claim · model-written summary

About 42% of black cumin farms were impacted by pests.

Taxon: Nigella sativaNigella sativat0
Outcome: black cumin farms were impacted by pestse7
Value: 42%e7

Verbatim

t0
“Black Cumin ( Nigella sativa L.)”
✓ located verbatim in the source · title, characters 14–46

e7
“42% of respondents’ black cumin farms were impacted by pests”
✓ located verbatim in the source · abstract, characters 1230–1290

Title

Assessment of Black Cumin ( Nigella sativa L.) Production and Productivity Influencing Factors in North and Northeastern Ethiopia

Solomon Kassaye Ejigu; Ermias Lulekal Molla; Wosene Gebreselassie Abtew Journal of Food Quality 2026. doi:10.1155/jfq/6615903

Other claims from this paper (10)

Association Family size, crop rotation and variety type significantly and favorably affected black cumin productivity.
Association Product market price and training variables significantly and favorably affected black cumin productivity.
Association Household head age had a significant negative effect on black cumin productivity.
Observation About 62% of black cumin crops were rotated with other crops.
Observation About 44% of black cumin crops were interplanted with other crops.
Observation 54% of respondents planted black cumin in undulating farmland.
Observation 46% of respondents planted black cumin in a plain.
Observation 36% of respondents farmed black cumin using improved varieties.
Observation About 79% of respondents sold black cumin seed at high prices.
Observation About 21% of respondents sold black cumin seed at low prices.

Observationobservedoriginal resultmeasured

Claim · model-written summary

About 79% of respondents sold black cumin seed at high prices.

Taxon: Nigella sativaNigella sativat0
Outcome: sold black cumin seed at highe7
Value: 79%e7

Verbatim

t0
“Black Cumin ( Nigella sativa L.)”
✓ located verbatim in the source · title, characters 14–46

e7
“79% and 21% of respondents sold black cumin seed at high and low prices, respectively”
✓ located verbatim in the source · abstract, characters 1296–1381

Title

Assessment of Black Cumin ( Nigella sativa L.) Production and Productivity Influencing Factors in North and Northeastern Ethiopia

Solomon Kassaye Ejigu; Ermias Lulekal Molla; Wosene Gebreselassie Abtew Journal of Food Quality 2026. doi:10.1155/jfq/6615903

Other claims from this paper (10)

Association Family size, crop rotation and variety type significantly and favorably affected black cumin productivity.
Association Product market price and training variables significantly and favorably affected black cumin productivity.
Association Household head age had a significant negative effect on black cumin productivity.
Observation About 62% of black cumin crops were rotated with other crops.
Observation About 44% of black cumin crops were interplanted with other crops.
Observation 54% of respondents planted black cumin in undulating farmland.
Observation 46% of respondents planted black cumin in a plain.
Observation 36% of respondents farmed black cumin using improved varieties.
Observation About 42% of black cumin farms were impacted by pests.
Observation About 21% of respondents sold black cumin seed at low prices.