Abstract
Abstract Field experiments were conducted on organic soil for 2 years to evaluate the influence of frequent irrigation and topdressings with N on growth, maturity and storage life of onions ( Allium cepa L.). With no irrigation, growth to midseason, maturity, and final yield were not influenced by increasing amounts of N. The growth to midseason, and the final yield increased and maturity was earlier with increasing amounts of N applied to onions receiving 5 cm of rainfall + irrigation per week. Sprouting in storage was earlier with high N and latest with no N or with the low N rates. The effect was greater with irrigation. Onions did not respond to N topdressing without irrigation even though rainfall was regular. With irrigation, the highest yield and earliest maturity was obtained with 22 or 34 kg of N/ha applied whenever the crop received 10 cm of water. No advantage in yield or maturity was obtained by applying N after mid-July. Maturity was earlier without irrigation regardless of N treatment.
Abstract from the paper’s OpenAlex record; open copy licensed cc-by-nc-nd. 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 10
Claim · model-written summary
Without irrigation, increasing nitrogen did not affect onion growth, maturity, or final yield.
- Taxon
- onions
Allium cepae1 - Treatment
- increasing amounts of Ne0
- Outcome
- growth to midseason, maturity, and final yielde0
- Direction
- not influencede0
- Comparator
- no irrigatione0
Organisms pictured · Representative pictures of the matched species, not figures from the paper.
Verbatim
e0“With no irrigation, growth to midseason, maturity, and final yield were not influenced by increasing amounts of N.”
e1“onions ( Allium cepa L.)”
Claim · model-written summary
With weekly rainfall plus irrigation, increasing nitrogen increased onion growth to midseason and final yield.
- Taxon
- onionsAllium cepae0
- Treatment
- increasing amounts of Ne0
- Outcome
- growth to midseason, and the final yielde0
- Direction
- increasede0
- Qualifier
- 5 cm of rainfall + irrigation per weeke0
Not reportedComparator
Organisms pictured · Representative pictures of the matched species, not figures from the paper.
Verbatim
e0“The growth to midseason, and the final yield increased and maturity was earlier with increasing amounts of N applied to onions receiving 5 cm of rainfall + irrigation per week.”
Claim · model-written summary
With weekly rainfall plus irrigation, increasing nitrogen advanced onion maturity.
- Taxon
- onionsAllium cepae0
- Treatment
- increasing amounts of Ne0
- Outcome
- maturitye0
- Direction
- earliere0
- Qualifier
- 5 cm of rainfall + irrigation per weeke0
Not reportedComparator
Organisms pictured · Representative pictures of the matched species, not figures from the paper.
Verbatim
e0“The growth to midseason, and the final yield increased and maturity was earlier with increasing amounts of N applied to onions receiving 5 cm of rainfall + irrigation per week.”
Claim · model-written summary
High nitrogen advanced sprouting in storage relative to no or low nitrogen.
- Taxon
- onionsAllium cepae1
- Treatment
- high Ne0
- Outcome
- Sprouting in storagee0
- Direction
- earliere0
- Comparator
- no N or with the low N ratese0
Organisms pictured · Representative pictures of the matched species, not figures from the paper.
Verbatim
e0“Sprouting in storage was earlier with high N and latest with no N or with the low N rates.”
e1“onions ( Allium cepa L.)”
Claim · model-written summary
Irrigation strengthened the nitrogen effect on storage sprouting.
- Taxon
- onionsAllium cepae2
- Treatment
- irrigatione0
- Outcome
- Sprouting in storagee1
- Direction
- greatere0
Organisms pictured · Representative pictures of the matched species, not figures from the paper.
Verbatim
e0“The effect was greater with irrigation.”
e1“Sprouting in storage was earlier with high N and latest with no N or with the low N rates.”
e2“onions ( Allium cepa L.)”
Claim · model-written summary
Nitrogen topdressing without irrigation did not induce an onion response despite regular rainfall.
- Taxon
- OnionsAllium cepae0
- Treatment
- N topdressinge0
- Outcome
- did not responde0
- Direction
- did not responde0
- Comparator
- without irrigatione0
Organisms pictured · Representative pictures of the matched species, not figures from the paper.
Verbatim
e0“Onions did not respond to N topdressing without irrigation even though rainfall was regular.”
Claim · model-written summary
With irrigation, 22 or 34 kg N/ha after each 10 cm water gave the highest onion yield.
- Taxon
- onionsAllium cepae1
- Treatment
- 22 or 34 kg of N/ha applied whenever the crop received 10 cm of watere0
- Outcome
- yielde0
- Direction
- higheste0
- Qualifier
- With irrigatione0
Not reportedComparator
Organisms pictured · Representative pictures of the matched species, not figures from the paper.
Verbatim
e0“With irrigation, the highest yield and earliest maturity was obtained with 22 or 34 kg of N/ha applied whenever the crop received 10 cm of water.”
e1“onions ( Allium cepa L.)”
Claim · model-written summary
With irrigation, 22 or 34 kg N/ha after each 10 cm water gave earliest onion maturity.
- Taxon
- onionsAllium cepae1
- Treatment
- 22 or 34 kg of N/ha applied whenever the crop received 10 cm of watere0
- Outcome
- maturitye0
- Direction
- earlieste0
- Qualifier
- With irrigatione0
Not reportedComparator
Organisms pictured · Representative pictures of the matched species, not figures from the paper.
Verbatim
e0“With irrigation, the highest yield and earliest maturity was obtained with 22 or 34 kg of N/ha applied whenever the crop received 10 cm of water.”
e1“onions ( Allium cepa L.)”
Claim · model-written summary
Nitrogen applied after mid-July gave no yield or maturity advantage.
- Taxon
- onionsAllium cepae1
- Treatment
- applying N after mid-Julye0
- Outcome
- yield or maturitye0
- Direction
- No advantagee0
Not reportedComparator
Organisms pictured · Representative pictures of the matched species, not figures from the paper.
Verbatim
e0“No advantage in yield or maturity was obtained by applying N after mid-July.”
e1“onions ( Allium cepa L.)”
Claim · model-written summary
Onions matured earlier without irrigation across nitrogen treatments.
- Taxon
- onionsAllium cepae1
- Treatment
- without irrigatione0
- Outcome
- Maturitye0
- Direction
- earliere0
- Qualifier
- regardless of N treatmente0
Not reportedComparator
Organisms pictured · Representative pictures of the matched species, not figures from the paper.
Verbatim
e0“Maturity was earlier without irrigation regardless of N treatment.”
e1“onions ( Allium cepa L.)”
The same questions in other papers
irrigation · phenology · Allium cepa (onion)Positive and negative results
3 in the opposite direction
- no effect
- no effect
- negative
nitrogen · phenology · Allium cepa (onion)Positive and negative results
7 papers in the same direction as this paper · 4 in the opposite direction
- no effect
- negative
- no effect
8 papers more in this group
See all 12 papers →nitrogen · quality: postharvest · Allium cepa (onion)Positive and negative results
4 papers in the same direction as this paper · 36 in the opposite direction
- positive
- positive
- positive
37 papers more in this group
See all 41 papers →nitrogen · yield · Allium cepa (onion)Positive and negative results
156 papers in the same direction as this paper · 23 in the opposite direction · 4 reporting no difference from an alternative
- negative
- no effect
- negative
180 papers more in this group
See all 184 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.