Abstract
Abstract Field studies with onions ( Allium cepa L. cv Monarch) were conducted in 1980 and 1981 to compare preplant-banded sulfur-coated urea (SCU) with preplant-banded and split applications of urea. Treatments were evaluated at two N rates, 56 and 224 kg·ha −1 . Root NO 3 -N and soil NO 3 -N concentrations in bed centers indicated slower release of N from SCU than from urea. Nevertheless, total and large bulb (> 76 mm in diameter) yields and N uptake in onion bulbs and leaves from SCU were significantly higher under low-N conditions than with preplant urea, but did not differ significantly from split urea treatments.
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 6
Claim · model-written summary
total was higher with SCU than preplant urea under low N
- Taxon
- onions ( Allium cepa L. cv Monarch)
Allium cepae1 - Treatment
- SCUe0
- Outcome
- totale0
- Direction
- highere0
- Qualifier
- under low-N conditionse0
- Comparator
- preplant ureae0
Organisms pictured · Representative pictures of the matched species, not figures from the paper.
Verbatim
e0“total and large bulb (> 76 mm in diameter) yields and N uptake in onion bulbs and leaves from SCU were significantly higher under low-N conditions than with preplant urea, but did not differ significantly from split urea treatments”
e1“onions ( Allium cepa L. cv Monarch)”
Claim · model-written summary
large bulb (> 76 mm in diameter) was higher with SCU than preplant urea under low N
- Taxon
- onions ( Allium cepa L. cv Monarch)Allium cepae1
- Treatment
- SCUe0
- Outcome
- large bulb (> 76 mm in diameter)e0
- Direction
- highere0
- Qualifier
- under low-N conditionse0
- Comparator
- preplant ureae0
Organisms pictured · Representative pictures of the matched species, not figures from the paper.
Verbatim
e0“total and large bulb (> 76 mm in diameter) yields and N uptake in onion bulbs and leaves from SCU were significantly higher under low-N conditions than with preplant urea, but did not differ significantly from split urea treatments”
e1“onions ( Allium cepa L. cv Monarch)”
Claim · model-written summary
N uptake in onion bulbs was higher with SCU than preplant urea under low N
- Taxon
- onions ( Allium cepa L. cv Monarch)Allium cepae1
- Treatment
- SCUe0
- Outcome
- N uptake in onion bulbse0
- Direction
- highere0
- Qualifier
- under low-N conditionse0
- Comparator
- preplant ureae0
Organisms pictured · Representative pictures of the matched species, not figures from the paper.
Verbatim
e0“total and large bulb (> 76 mm in diameter) yields and N uptake in onion bulbs and leaves from SCU were significantly higher under low-N conditions than with preplant urea, but did not differ significantly from split urea treatments”
e1“onions ( Allium cepa L. cv Monarch)”
Claim · model-written summary
N uptake in onion bulbs and leaves was higher with SCU than preplant urea under low N
- Taxon
- onions ( Allium cepa L. cv Monarch)Allium cepae1
- Treatment
- SCUe0
- Outcome
- N uptake in onion bulbs and leavese0
- Direction
- highere0
- Qualifier
- under low-N conditionse0
- Comparator
- preplant ureae0
Organisms pictured · Representative pictures of the matched species, not figures from the paper.
Verbatim
e0“total and large bulb (> 76 mm in diameter) yields and N uptake in onion bulbs and leaves from SCU were significantly higher under low-N conditions than with preplant urea, but did not differ significantly from split urea treatments”
e1“onions ( Allium cepa L. cv Monarch)”
Claim · model-written summary
SCU released nitrogen more slowly than urea
- Taxon
- onions ( Allium cepa L. cv Monarch)Allium cepae1
- Treatment
- SCUe0
- Outcome
- release of Ne0
- Direction
- slowere0
- Comparator
- ureae0
Organisms pictured · Representative pictures of the matched species, not figures from the paper.
Verbatim
e0“Root NO 3 -N and soil NO 3 -N concentrations in bed centers indicated slower release of N from SCU than from urea.”
e1“onions ( Allium cepa L. cv Monarch)”
Claim · model-written summary
SCU outcomes did not differ significantly from split urea treatments
- Taxon
- onions ( Allium cepa L. cv Monarch)Allium cepae1
- Treatment
- SCUe0
- Outcome
- total and large bulb (> 76 mm in diameter) yields and N uptake in onion bulbs and leavese0
- Direction
- did not differe0
- Comparator
- split urea treatmentse0
Organisms pictured · Representative pictures of the matched species, not figures from the paper.
Verbatim
e0“total and large bulb (> 76 mm in diameter) yields and N uptake in onion bulbs and leaves from SCU were significantly higher under low-N conditions than with preplant urea, but did not differ significantly from split urea treatments”
e1“onions ( Allium cepa L. cv Monarch)”
The same questions in other papers
nitrogen · growth · Allium cepa (onion)Results differ
70 papers in the same direction as this paper · 9 in the opposite direction · 1 reporting no difference from an alternative
- no effect
- positive
- negative
77 papers more in this group
See all 81 papers →nitrogen · nutrient: content · Allium cepa (onion)Positive and negative results
26 papers in the same direction as this paper · 3 in the opposite direction
- no effect
- no effect
- negative
26 papers more in this group
See all 30 papers →nitrogen · yield · Allium cepa (onion)Positive and negative results
26 papers in the same direction as this paper · 157 reporting no difference from an alternative
- positive
- negative
- positive
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.