Abstract
Abstract In field studies with potatoes, cantaloupes, and tomatoes, using N sources banded in the soil, highest yields were obtained with (NH 4 ) 2 SO 4 . Yields with urea-formaldehyde and sulfur-coated urea were similar to each other, and less than those from urea. Nitrogen absorption, as determined by NO 3 - concn in the petiolar tissue or total N absorption by the entire plant, was in the same sequence as yields. Controlled-release fertilizers did not increase N absorption during late growth. About 90% of the N from (NH 4 ) 2 SO 4 and urea had nitrified and leached from the fertilizer band within 40 days after application. In contrast, about half of the N from urea-formaldehyde remained in the fertilizer band 120 days after application.
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 8
Claim · model-written summary
Ammonium sulfate gave the highest yields in field trials.
- Taxon
- potatoes, cantaloupes, and tomatoes
Cucumis melo var. cantalupo
Solanum lycopersicum
Solanum tuberosume0 - Treatment
- (NH 4 ) 2 SO 4e0
- Outcome
- yieldse0
- Direction
- higheste0
- Setting
- field studiese0
Not reportedComparator
Organisms pictured · Representative pictures of the matched species, not figures from the paper.
Verbatim
e0“In field studies with potatoes, cantaloupes, and tomatoes, using N sources banded in the soil, highest yields were obtained with (NH 4 ) 2 SO 4 .”
Claim · model-written summary
Urea-formaldehyde gave yields below urea.
- Taxon
- Potatoes, Cantaloupes, and TomatoesCucumis melo var. cantalupoSolanum lycopersicumSolanum tuberosumt0
- Treatment
- urea-formaldehydee0
- Outcome
- Yieldse0
- Direction
- less thane0
- Comparator
- ureae0
Organisms pictured · Representative pictures of the matched species, not figures from the paper.
Verbatim
e0“Yields with urea-formaldehyde and sulfur-coated urea were similar to each other, and less than those from urea.”
t0“Potatoes, Cantaloupes, and Tomatoes”
Claim · model-written summary
Sulfur-coated urea gave yields below urea.
- Taxon
- Potatoes, Cantaloupes, and TomatoesCucumis melo var. cantalupoSolanum lycopersicumSolanum tuberosumt0
- Treatment
- sulfur-coated ureae0
- Outcome
- Yieldse0
- Direction
- less thane0
- Comparator
- ureae0
Organisms pictured · Representative pictures of the matched species, not figures from the paper.
Verbatim
e0“Yields with urea-formaldehyde and sulfur-coated urea were similar to each other, and less than those from urea.”
t0“Potatoes, Cantaloupes, and Tomatoes”
Claim · model-written summary
Nitrogen absorption followed the same fertilizer ranking as yield.
- Taxon
- Potatoes, Cantaloupes, and TomatoesCucumis melo var. cantalupoSolanum lycopersicumSolanum tuberosumt0
- Organ / stage
- petiolar tissuee0
- Outcome
- Nitrogen absorptione0
Organisms pictured · Representative pictures of the matched species, not figures from the paper.
Verbatim
e0“Nitrogen absorption, as determined by NO 3 - concn in the petiolar tissue or total N absorption by the entire plant, was in the same sequence as yields.”
t0“Potatoes, Cantaloupes, and Tomatoes”
Claim · model-written summary
Controlled-release fertilizers did not increase late-growth nitrogen absorption.
- Taxon
- Potatoes, Cantaloupes, and TomatoesCucumis melo var. cantalupoSolanum lycopersicumSolanum tuberosumt0
- Organ / stage
- late growthe0
- Treatment
- Controlled-release fertilizerse0
- Outcome
- N absorptione0
- Direction
- did not increasee0
Not reportedComparator
Organisms pictured · Representative pictures of the matched species, not figures from the paper.
Verbatim
e0“Controlled-release fertilizers did not increase N absorption during late growth.”
t0“Potatoes, Cantaloupes, and Tomatoes”
Claim · model-written summary
About 90% of ammonium sulfate nitrogen had nitrified and leached within 40 days.
- Taxon
- Potatoes, Cantaloupes, and TomatoesCucumis melo var. cantalupoSolanum lycopersicumSolanum tuberosumt0
- Treatment
- (NH 4 ) 2 SO 4e0
- Outcome
- N from (NH 4 ) 2 SO 4 and urea had nitrified and leachede0
- Value
- 90%e0
- Qualifier
- within 40 days after applicatione0
Organisms pictured · Representative pictures of the matched species, not figures from the paper.
Verbatim
e0“About 90% of the N from (NH 4 ) 2 SO 4 and urea had nitrified and leached from the fertilizer band within 40 days after application.”
t0“Potatoes, Cantaloupes, and Tomatoes”
Claim · model-written summary
About 90% of urea nitrogen had nitrified and leached within 40 days.
- Taxon
- Potatoes, Cantaloupes, and TomatoesCucumis melo var. cantalupoSolanum lycopersicumSolanum tuberosumt0
- Treatment
- ureae0
- Outcome
- N from (NH 4 ) 2 SO 4 and urea had nitrified and leachede0
- Value
- 90%e0
- Qualifier
- within 40 days after applicatione0
Organisms pictured · Representative pictures of the matched species, not figures from the paper.
Verbatim
e0“About 90% of the N from (NH 4 ) 2 SO 4 and urea had nitrified and leached from the fertilizer band within 40 days after application.”
t0“Potatoes, Cantaloupes, and Tomatoes”
Claim · model-written summary
About half of urea-formaldehyde nitrogen remained in the fertilizer band after 120 days.
- Taxon
- Potatoes, Cantaloupes, and TomatoesCucumis melo var. cantalupoSolanum lycopersicumSolanum tuberosumt0
- Treatment
- urea-formaldehydee0
- Outcome
- N from urea-formaldehyde remained in the fertilizer bande0
- Value
- about halfe0
- Qualifier
- 120 days after applicatione0
Organisms pictured · Representative pictures of the matched species, not figures from the paper.
Verbatim
e0“about half of the N from urea-formaldehyde remained in the fertilizer band 120 days after application.”
t0“Potatoes, Cantaloupes, and Tomatoes”
The same questions in other papers
nitrogen · yield · Solanum tuberosum (potato)Results differ
22 papers in the same direction as this paper · 109 in the opposite direction
- positive
- positive
- positive
128 papers more in this group
See all 132 papers →fertilization · nutrient: content · Cucumis melo (muskmelon)Positive and negative results
8 papers in the same direction as this paper · 10 in the opposite direction
- positive
- positive
- positive
15 papers more in this group
See all 19 papers →nitrogen · yield · Cucumis melo (muskmelon)Positive and negative results
4 papers in the same direction as this paper · 23 in the opposite direction
- positive
- positive
- positive
24 papers more in this group
See all 28 papers →fertilization · nutrient: content · Solanum tuberosum (potato)Positive and negative results
25 papers in the same direction as this paper · 97 in the opposite direction
- positive
- positive
- positive
119 papers more in this group
See all 123 papers →nitrogen · yield · Solanum lycopersicum (tomato)Positive and negative results
37 papers in the same direction as this paper · 172 in the opposite direction
- positive
- positive
- positive
206 papers more in this group
See all 210 papers →fertilization · nutrient: content · Solanum lycopersicum (tomato)Positive and negative results
44 papers in the same direction as this paper · 226 in the opposite direction
- positive
- positive
- positive
267 papers more in this group
See all 271 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.