Paper · 1960 · Canadian Journal of Soil Science

THE EFFECT OF NITROGEN TOP DRESSING ON YIELD AND PROTEIN CONTENT OF NITROGEN-DEFICIENT CEREALS

D. K. McBeath; J. A. Toogood

5
claims
10
verbatim quotes
14
citations
2
research areas
—
Not open access

Abstract

Top dressings of ammonium nitrate were made during the growing season to crops of barley and oats showing symptoms of acute nitrogen deficiency. The addition of nitrogen in the early stages of plant growth resulted in increased vegetative growth and increased yields. Applications of nitrogen delayed until the shot-blade stage had little effect on yield, but substantially increased the protein content. The yield of protein per acre was increased with higher rates of fertilization, regardless of whether the effect of the added nitrogen was to increase yield or protein content.

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 5

Intervention effectobservedoriginal resultpositivemeasured

Claim · model-written summary

Early nitrogen addition increased vegetative growth.

Taxon
barley and oatsAvena sativaHordeum vulgaret0
Treatment
addition of nitrogen in the early stages of plant growthe0
Outcome
vegetative growthe0
Direction
increasede0

Not reportedComparator

Organisms pictured · Representative pictures of the matched species, not figures from the paper.

Avena sativa
Avena sativa · TaxonSendelbach ( talk ) · CC BY-SA 3.0 · Wikimedia Commons ↗
Hordeum vulgare
Hordeum vulgare · TaxonJackyM59 · CC BY-SA 4.0 · Wikimedia Commons ↗

Verbatim

e0

“The addition of nitrogen in the early stages of plant growth resulted in increased vegetative growth and increased yields.”

✓ located verbatim in the source · abstract, characters 145–267 · show in text ↑
t0

“crops of barley and oats showing symptoms”

✓ located verbatim in the source · abstract, characters 73–114 · show in text ↑
Intervention effectobservedoriginal resultpositivemeasured

Claim · model-written summary

Early nitrogen addition increased yield.

Taxon
barley and oatsAvena sativaHordeum vulgaret0
Treatment
addition of nitrogen in the early stages of plant growthe0
Outcome
yieldse0
Direction
increasede0

Not reportedComparator

Organisms pictured · Representative pictures of the matched species, not figures from the paper.

Avena sativa
Avena sativa · TaxonSendelbach ( talk ) · CC BY-SA 3.0 · Wikimedia Commons ↗
Hordeum vulgare
Hordeum vulgare · TaxonJackyM59 · CC BY-SA 4.0 · Wikimedia Commons ↗

Verbatim

e0

“The addition of nitrogen in the early stages of plant growth resulted in increased vegetative growth and increased yields.”

✓ located verbatim in the source · abstract, characters 145–267 · show in text ↑
t0

“crops of barley and oats showing symptoms”

✓ located verbatim in the source · abstract, characters 73–114 · show in text ↑
Intervention effectobservedoriginal resultno effectmeasured

Claim · model-written summary

Nitrogen delayed to shot-blade stage had little yield effect.

Taxon
barley and oatsAvena sativaHordeum vulgaret0
Treatment
Applications of nitrogen delayed until the shot-blade stagee0
Outcome
yielde0
Direction
little effecte0

Not reportedComparator

Organisms pictured · Representative pictures of the matched species, not figures from the paper.

Avena sativa
Avena sativa · TaxonSendelbach ( talk ) · CC BY-SA 3.0 · Wikimedia Commons ↗
Hordeum vulgare
Hordeum vulgare · TaxonJackyM59 · CC BY-SA 4.0 · Wikimedia Commons ↗

Verbatim

e0

“Applications of nitrogen delayed until the shot-blade stage had little effect on yield”

✓ located verbatim in the source · abstract, characters 268–354 · show in text ↑
t0

“crops of barley and oats showing symptoms”

✓ located verbatim in the source · abstract, characters 73–114 · show in text ↑
Intervention effectobservedoriginal resultpositivemeasured

Claim · model-written summary

Late nitrogen substantially increased protein content.

Taxon
barley and oatsAvena sativaHordeum vulgaret0
Treatment
Applications of nitrogen delayed until the shot-blade stagee0
Outcome
protein contente0
Direction
increasede0

Not reportedComparator

Organisms pictured · Representative pictures of the matched species, not figures from the paper.

Avena sativa
Avena sativa · TaxonSendelbach ( talk ) · CC BY-SA 3.0 · Wikimedia Commons ↗
Hordeum vulgare
Hordeum vulgare · TaxonJackyM59 · CC BY-SA 4.0 · Wikimedia Commons ↗

Verbatim

e0

“Applications of nitrogen delayed until the shot-blade stage had little effect on yield, but substantially increased the protein content.”

✓ located verbatim in the source · abstract, characters 268–404 · show in text ↑
t0

“crops of barley and oats showing symptoms”

✓ located verbatim in the source · abstract, characters 73–114 · show in text ↑
Intervention effectobservedoriginal resultpositivemeasured

Claim · model-written summary

Higher fertilization rates increased protein yield per acre.

Taxon
barley and oatsAvena sativaHordeum vulgaret0
Treatment
higher rates of fertilizatione0
Outcome
yield of protein per acree0
Direction
increasede0

Not reportedComparator

Organisms pictured · Representative pictures of the matched species, not figures from the paper.

Avena sativa
Avena sativa · TaxonSendelbach ( talk ) · CC BY-SA 3.0 · Wikimedia Commons ↗
Hordeum vulgare
Hordeum vulgare · TaxonJackyM59 · CC BY-SA 4.0 · Wikimedia Commons ↗

Verbatim

e0

“The yield of protein per acre was increased with higher rates of fertilization”

✓ located verbatim in the source · abstract, characters 405–483 · show in text ↑
t0

“crops of barley and oats showing symptoms”

✓ located verbatim in the source · abstract, characters 73–114 · show in text ↑

nitrogen · quality: protein · Avena sativa (oats)Results differ

26 papers: 24 positive, 2 negative or no effect

23 papers in the same direction as this paper · 2 in the opposite direction

  1. negative
  2. no effect
  3. positive

22 papers more in this group

See all 26 papers →

fertilization · quality: protein · Avena sativa (oats)Results differ

28 papers: 25 positive, 3 negative or no effect

24 papers in the same direction as this paper · 3 in the opposite direction

  1. negative
  2. no effect
  3. no effect

24 papers more in this group

See all 28 papers →

nitrogen · growth · Hordeum vulgare (barley)Results differ

110 papers: 66 positive, 44 negative or no effect

65 papers in the same direction as this paper · 42 in the opposite direction · 2 reporting no difference from an alternative

  1. positive
  2. no effect
  3. no effect

106 papers more in this group

See all 110 papers →

nitrogen · growth · Avena sativa (oats)Positive and negative results

48 papers: 38 positive, 10 negative or no effect

37 papers in the same direction as this paper · 10 in the opposite direction

  1. negative
  2. no effect
  3. negative

44 papers more in this group

See all 48 papers →

nitrogen · quality: protein · Hordeum vulgare (barley)Positive and negative results

72 papers: 66 positive, 6 negative or no effect

65 papers in the same direction as this paper · 6 in the opposite direction

  1. positive
  2. positive
  3. negative

68 papers more in this group

See all 72 papers →

fertilization · quality: protein · Hordeum vulgare (barley)Positive and negative results

79 papers: 64 positive, 15 negative or no effect

63 papers in the same direction as this paper · 14 in the opposite direction · 1 reporting no difference from an alternative

  1. positive
  2. no effect
  3. negative

75 papers more in this group

See all 79 papers →

nitrogen · yield · Avena sativa (oats)Positive and negative results

116 papers: 105 positive, 11 negative or no effect

104 papers in the same direction as this paper · 11 in the opposite direction

  1. positive
  2. negative
  3. negative

112 papers more in this group

See all 116 papers →

nitrogen · yield · Hordeum vulgare (barley)Positive and negative results

299 papers: 252 positive, 47 negative or no effect

251 papers in the same direction as this paper · 44 in the opposite direction · 3 reporting no difference from an alternative

  1. positive
  2. positive
  3. negative

295 papers more in this group

See all 299 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.