Abstract
Abstract The application of supplemental nitrogen to corn by the use of urea foliar sprays was investigated. Injury in the form of marginal leaf burn was dependent upon both the concentration of the solution and the rate of application. The amount of injury could also be modified by additions of sugar, calcium hydroxide and potassium bicarbonate. Yield response of corn to foliar applied nitrogen was no greater than to the same amount of nitrogen applied as a side dressing. When injury occurred the yield response was reduced. The cause of the marginal leaf burn was investigated. Ammonia or nitrites did not appear to cause the injury. It was postulated that some product or a number of products of ammonia metabolism caused the injury. The beneficial effect of sucrose was believed to be due to the decreased rate of urea absorption and an increased rate of urea translocation within the plant.
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Claims 12
Claim · model-written summary
Leaf burn depended on urea solution concentration.
- Taxon
- Corn
Zea mays subsp. mayst0 - Treatment
- concentration of the solutione0
- Outcome
- marginal leaf burne0
Not reportedDirection
Organisms pictured · Representative pictures of the matched species, not figures from the paper.
Verbatim
e0“Injury in the form of marginal leaf burn was dependent upon both the concentration of the solution and the rate of application.”
t0“Corn”
Claim · model-written summary
Leaf burn depended on urea application rate.
- Taxon
- CornZea mays subsp. mayst0
- Treatment
- rate of applicatione0
- Outcome
- marginal leaf burne0
Not reportedDirection
Organisms pictured · Representative pictures of the matched species, not figures from the paper.
Verbatim
e0“Injury in the form of marginal leaf burn was dependent upon both the concentration of the solution and the rate of application.”
t0“Corn”
Claim · model-written summary
Sugar additions modified leaf burn injury.
- Taxon
- CornZea mays subsp. mayst0
- Treatment
- sugare0
- Outcome
- amount of injurye0
Not reportedComparatorDirection
Organisms pictured · Representative pictures of the matched species, not figures from the paper.
Verbatim
e0“The amount of injury could also be modified by additions of sugar, calcium hydroxide and potassium bicarbonate.”
t0“Corn”
Claim · model-written summary
Calcium hydroxide additions modified leaf burn injury.
- Taxon
- CornZea mays subsp. mayst0
- Treatment
- calcium hydroxidee0
- Outcome
- amount of injurye0
Not reportedComparatorDirection
Organisms pictured · Representative pictures of the matched species, not figures from the paper.
Verbatim
e0“The amount of injury could also be modified by additions of sugar, calcium hydroxide and potassium bicarbonate.”
t0“Corn”
Claim · model-written summary
Potassium bicarbonate additions modified leaf burn injury.
- Taxon
- CornZea mays subsp. mayst0
- Treatment
- potassium bicarbonatee0
- Outcome
- amount of injurye0
Not reportedComparatorDirection
Organisms pictured · Representative pictures of the matched species, not figures from the paper.
Verbatim
e0“The amount of injury could also be modified by additions of sugar, calcium hydroxide and potassium bicarbonate.”
t0“Corn”
Claim · model-written summary
Foliar nitrogen gave no greater corn yield response than the same amount as a side dressing.
- Taxon
- cornZea mays subsp. mayse0
- Treatment
- foliar applied nitrogene0
- Outcome
- Yield responsee0
- Direction
- no greatere0
- Comparator
- the same amount of nitrogen applied as a side dressinge0
Organisms pictured · Representative pictures of the matched species, not figures from the paper.
Verbatim
e0“Yield response of corn to foliar applied nitrogen was no greater than to the same amount of nitrogen applied as a side dressing.”
Claim · model-written summary
Injury reduced corn yield response.
- Taxon
- CornZea mays subsp. mayst0
- Treatment
- injurye0
- Outcome
- yield responsee0
- Direction
- reducede0
Organisms pictured · Representative pictures of the matched species, not figures from the paper.
Verbatim
e0“When injury occurred the yield response was reduced.”
t0“Corn”
Claim · model-written summary
Ammonia did not appear to cause marginal leaf burn.
- Taxon
- CornZea mays subsp. mayst0
- Compound
- Ammoniae0
- Outcome
- injurye0
Organisms pictured · Representative pictures of the matched species, not figures from the paper.
Verbatim
e0“Ammonia or nitrites did not appear to cause the injury.”
t0“Corn”
Claim · model-written summary
Nitrites did not appear to cause marginal leaf burn.
- Taxon
- CornZea mays subsp. mayst0
- Compound
- nitritese0
- Outcome
- injurye0
Organisms pictured · Representative pictures of the matched species, not figures from the paper.
Verbatim
e0“Ammonia or nitrites did not appear to cause the injury.”
t0“Corn”
Claim · model-written summary
Products of ammonia metabolism were postulated to cause leaf burn.
- Taxon
- CornZea mays subsp. mayst0
- Outcome
- injurye0
- Qualifier
- products of ammonia metabolisme0
Organisms pictured · Representative pictures of the matched species, not figures from the paper.
Verbatim
e0“It was postulated that some product or a number of products of ammonia metabolism caused the injury.”
t0“Corn”
Claim · model-written summary
Sucrose was believed beneficial because it slowed urea absorption.
- Taxon
- CornZea mays subsp. mayst0
- Compound
- sucrosee0
- Outcome
- beneficial effecte0
- Qualifier
- decreased rate of urea absorptione0
Organisms pictured · Representative pictures of the matched species, not figures from the paper.
Verbatim
e0“The beneficial effect of sucrose was believed to be due to the decreased rate of urea absorption”
t0“Corn”
Claim · model-written summary
Sucrose was believed beneficial because it increased urea translocation.
- Taxon
- CornZea mays subsp. mayst0
- Outcome
- increased rate of urea translocatione0
- Qualifier
- within the plante0
Not reportedCompound
Organisms pictured · Representative pictures of the matched species, not figures from the paper.
Verbatim
e0“an increased rate of urea translocation within the plant.”
t0“Corn”
The same questions in other papers
application · yield · Zea mays (maize)Positive and negative results
53 papers in the same direction as this paper · 575 reporting no difference from an alternative
- no effect
- positive
- positive
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See all 629 papers →nitrogen · yield · Zea mays (maize)Positive and negative results
278 papers in the same direction as this paper · 1,906 reporting no difference from an alternative
- positive
- positive
- positive
2,181 papers more in this group
See all 2,185 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.