Abstract
SummaryField experiments were conducted to evaluate growth, yield and quality of shallot (Allium cepa var. ascalonicum Baker) under three levels of irrigation and nitrogen fertilization, on a clay soil in the sub-humid tropical climate of eastern Ethiopia from 1999 to 2002. Treatments comprised furrow irrigation at three moisture levels (75, 50 and 25% available soil moisture) and three nitrogen levels (0, 75 and 150 kg ha–1), using two local shallot cultivars. Bulb yield and mean bulb weight of both cultivars were higher at irrigation levels of 75% than at 50% or 25% available soil moisture. Total weight and rotting losses of bulbs were highest at the irrigation level of 75% and least at 25% available soil moisture in the cultivar ‘DZ-sht-91’, while in cultivar ‘Fedis’ irrigation treatments did not affect storability. The best irrigation water-use efficiency was obtained with irrigation at 50% available soil moisture. Nitrogen at 75 or 150 kg ha–1 increased the pyruvic acid content of bulbs. Application of nitrogen tended to increase mean bulb weight in ‘Fedis’ while ‘DZ-sht-91’ receiving no nitrogen had heavier bulbs. No significant effects were observed on the yield, dry matter, soluble solids and storability of bulbs due to the nitrogen fertilization. No interaction effects were observed between N and irrigation treatments. Irrigation at 75% available soil moisture is suggested for shallots destined for immediate use.
Abstract from the paper’s OpenAlex record, shown for indexing and research. Copyright remains with the authors or the publisher. 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 16
Claim · model-written summary
At 75% available soil moisture, both shallot cultivars had higher bulb yield than at 50% or 25%.
- Taxon
- shallot
Allium cepa var. aggregatumt0 - Treatment
- irrigation levels of 75%e0
- Outcome
- Bulb yielde0
- Direction
- highere0
- Comparator
- 50% or 25% available soil moisturee0
Organisms pictured · Representative pictures of the matched species, not figures from the paper.
Verbatim
e0“Bulb yield and mean bulb weight of both cultivars were higher at irrigation levels of 75% than at 50% or 25% available soil moisture.”
t0“Shallot yield”
Claim · model-written summary
At 75% available soil moisture, both shallot cultivars had higher mean bulb weight than at 50% or 25%.
- Taxon
- shallotAllium cepa var. aggregatumt0
- Treatment
- irrigation levels of 75%e0
- Outcome
- mean bulb weighte0
- Direction
- highere0
- Comparator
- 50% or 25% available soil moisturee0
Organisms pictured · Representative pictures of the matched species, not figures from the paper.
Verbatim
e0“Bulb yield and mean bulb weight of both cultivars were higher at irrigation levels of 75% than at 50% or 25% available soil moisture.”
t0“Shallot yield”
Claim · model-written summary
DZ-sht-91 had the highest total bulb weight loss at 75% irrigation and the least at 25%.
- Taxon
- shallotAllium cepa var. aggregatumt0
- Material
- DZ-sht-91e0
- Treatment
- irrigation level of 75%e0
- Outcome
- Total weight and rotting losses of bulbse0
- Direction
- higheste0
- Comparator
- 25% available soil moisturee0
Organisms pictured · Representative pictures of the matched species, not figures from the paper.
Verbatim
e0“Total weight and rotting losses of bulbs were highest at the irrigation level of 75% and least at 25% available soil moisture in the cultivar ‘DZ-sht-91’”
t0“Shallot yield”
Claim · model-written summary
DZ-sht-91 had the highest bulb rotting loss at 75% irrigation and the least at 25%.
- Taxon
- shallotAllium cepa var. aggregatumt0
- Material
- DZ-sht-91e0
- Treatment
- irrigation level of 75%e0
- Outcome
- rotting losses of bulbse0
- Direction
- higheste0
- Comparator
- 25% available soil moisturee0
Organisms pictured · Representative pictures of the matched species, not figures from the paper.
Verbatim
e0“Total weight and rotting losses of bulbs were highest at the irrigation level of 75% and least at 25% available soil moisture in the cultivar ‘DZ-sht-91’”
t0“Shallot yield”
Claim · model-written summary
Irrigation treatments did not affect storability of Fedis bulbs.
- Taxon
- shallotAllium cepa var. aggregatumt0
- Material
- Fedise0
- Treatment
- irrigation treatmentse0
- Outcome
- storabilitye0
- Direction
- did not affecte0
Not reportedComparator
Organisms pictured · Representative pictures of the matched species, not figures from the paper.
Verbatim
e0“in cultivar ‘Fedis’ irrigation treatments did not affect storability”
t0“Shallot yield”
Claim · model-written summary
Irrigation at 50% available soil moisture gave the best irrigation water-use efficiency.
- Taxon
- shallotAllium cepa var. aggregatumt0
- Treatment
- irrigation at 50% available soil moisturee0
- Outcome
- irrigation water-use efficiencye0
- Direction
- beste0
Not reportedComparator
Organisms pictured · Representative pictures of the matched species, not figures from the paper.
Verbatim
e0“The best irrigation water-use efficiency was obtained with irrigation at 50% available soil moisture.”
t0“Shallot yield”
Claim · model-written summary
Nitrogen at 75 kg ha–1 increased bulb pyruvic acid content.
- Taxon
- shallotAllium cepa var. aggregatumt0
- Treatment
- Nitrogen at 75e0
- Outcome
- pyruvic acid content of bulbse0
- Direction
- increasede0
Not reportedComparator
Organisms pictured · Representative pictures of the matched species, not figures from the paper.
Verbatim
e0“Nitrogen at 75 or 150 kg ha–1 increased the pyruvic acid content of bulbs.”
t0“Shallot yield”
Claim · model-written summary
Nitrogen at 150 kg ha–1 increased bulb pyruvic acid content.
- Taxon
- shallotAllium cepa var. aggregatumt0
- Treatment
- 150 kg ha–1e0
- Outcome
- pyruvic acid content of bulbse0
- Direction
- increasede0
Not reportedComparator
Organisms pictured · Representative pictures of the matched species, not figures from the paper.
Verbatim
e0“Nitrogen at 75 or 150 kg ha–1 increased the pyruvic acid content of bulbs.”
t0“Shallot yield”
Claim · model-written summary
Nitrogen tended to increase mean bulb weight in Fedis.
- Taxon
- shallotAllium cepa var. aggregatumt0
- Material
- Fedise0
- Treatment
- Application of nitrogene0
- Outcome
- mean bulb weighte0
- Direction
- increasee0
Not reportedComparator
Organisms pictured · Representative pictures of the matched species, not figures from the paper.
Verbatim
e0“Application of nitrogen tended to increase mean bulb weight in ‘Fedis’”
t0“Shallot yield”
Claim · model-written summary
Without nitrogen, DZ-sht-91 had heavier bulbs.
- Taxon
- shallotAllium cepa var. aggregatumt0
- Material
- DZ-sht-91e0
- Treatment
- no nitrogene0
- Outcome
- bulbse0
- Direction
- heaviere0
Not reportedComparator
Organisms pictured · Representative pictures of the matched species, not figures from the paper.
Verbatim
e0“‘DZ-sht-91’ receiving no nitrogen had heavier bulbs.”
t0“Shallot yield”
Claim · model-written summary
Nitrogen fertilization had no significant effect on bulb yield.
- Taxon
- shallotAllium cepa var. aggregatumt0
- Treatment
- nitrogen fertilizatione0
- Outcome
- yielde0
Not reportedComparatorDirection
Organisms pictured · Representative pictures of the matched species, not figures from the paper.
Verbatim
e0“No significant effects were observed on the yield, dry matter, soluble solids and storability of bulbs due to the nitrogen fertilization.”
t0“Shallot yield”
Claim · model-written summary
Nitrogen fertilization had no significant effect on bulb dry matter.
- Taxon
- shallotAllium cepa var. aggregatumt0
- Treatment
- nitrogen fertilizatione0
- Outcome
- dry mattere0
Not reportedComparatorDirection
Organisms pictured · Representative pictures of the matched species, not figures from the paper.
Verbatim
e0“No significant effects were observed on the yield, dry matter, soluble solids and storability of bulbs due to the nitrogen fertilization.”
t0“Shallot yield”
Claim · model-written summary
Nitrogen fertilization had no significant effect on bulb soluble solids.
- Taxon
- shallotAllium cepa var. aggregatumt0
- Treatment
- nitrogen fertilizatione0
- Outcome
- soluble solidse0
Not reportedComparatorDirection
Organisms pictured · Representative pictures of the matched species, not figures from the paper.
Verbatim
e0“No significant effects were observed on the yield, dry matter, soluble solids and storability of bulbs due to the nitrogen fertilization.”
t0“Shallot yield”
Claim · model-written summary
Nitrogen fertilization had no significant effect on bulb storability.
- Taxon
- shallotAllium cepa var. aggregatumt0
- Treatment
- nitrogen fertilizatione0
- Outcome
- storability of bulbse0
Not reportedComparatorDirection
Organisms pictured · Representative pictures of the matched species, not figures from the paper.
Verbatim
e0“No significant effects were observed on the yield, dry matter, soluble solids and storability of bulbs due to the nitrogen fertilization.”
t0“Shallot yield”
Claim · model-written summary
The study found no interaction effects between nitrogen and irrigation treatments.
- Taxon
- shallotAllium cepa var. aggregatumt0
- Treatment
- N and irrigation treatmentse0
- Outcome
- interaction effectse0
Organisms pictured · Representative pictures of the matched species, not figures from the paper.
Verbatim
e0“No interaction effects were observed between N and irrigation treatments.”
t0“Shallot yield”
Claim · model-written summary
The authors suggest irrigation at 75% available soil moisture for shallots intended for immediate use.
- Taxon
- shallotsAllium cepa var. aggregatume0
- Outcome
- Irrigation at 75% available soil moisturee0
- Qualifier
- destined for immediate usee0
Organisms pictured · Representative pictures of the matched species, not figures from the paper.
Verbatim
e0“Irrigation at 75% available soil moisture is suggested for shallots destined for immediate use.”
The same questions in other papers
fertilization · quality: sugar starch · Allium cepa (onion)Results differ
7 papers in the same direction as this paper · 36 in the opposite direction
- positive
- positive
- positive
40 papers more in this group
See all 44 papers →irrigation · disease · Allium cepa (onion)Positive and negative results
8 papers in the same direction as this paper · 5 in the opposite direction
- positive
- positive
- positive
10 papers more in this group
See all 14 papers →irrigation · quality: postharvest · Allium cepa (onion)Positive and negative results
8 papers in the same direction as this paper · 25 in the opposite direction
- positive
- positive
- positive
30 papers more in this group
See all 34 papers →irrigation · physiology: water · Allium cepa (onion)Positive and negative results
46 papers in the same direction as this paper · 2 in the opposite direction
- positive
- negative
- negative
45 papers more in this group
See all 49 papers →fertilization · quality: postharvest · Allium cepa (onion)Positive and negative results
15 papers in the same direction as this paper · 53 in the opposite direction
- positive
- positive
- positive
65 papers more in this group
See all 69 papers →irrigation · yield · Allium cepa (onion)Positive and negative results
105 papers in the same direction as this paper · 22 in the opposite direction · 5 reporting no difference from an alternative
- positive
- positive
- positive
129 papers more in this group
See all 133 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
- no effect
- positive
- positive
180 papers more in this group
See all 184 papers →fertilization · growth · Allium cepa (onion)Positive and negative results
42 papers in the same direction as this paper · 251 in the opposite direction
- positive
- negative
- positive
290 papers more in this group
See all 294 papers →8 of 10 groups shown: named compounds and organisms first, then groups whose results differ (checked claim by claim), then those with positive and negative results, then the smaller groups.
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.