Paper · 1965 · Agronomy Journal

Sulfur and Nitrogen Content of Alfalfa Herbage During Growth1

F. V. Pumphrey; D. P. Moore

7
claims
10
verbatim quotes
29
citations
2
research areas
—
Not open access

Abstract

Synopsis Sulfur fertilization increased the sulfur and nitrogen content and yield of alfalfa herbage. Percent sulfur was highest in the young growth and declined at a near linear rate for both deficient and nondeficient plants. The use of a critical level of sulfur in alfalfa herbage needs to be associated with a definite stage of growth. The nitrogen to sulfur ratio in the herbage was nearly constant at all stages of growth and was much narrower in the nondeficient than in sulfur‐deficient herbage.

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Claims 7

Intervention effectobservedoriginal resultpositivemeasured

Claim · model-written summary

Sulfur fertilization increased herbage sulfur content.

Taxon
alfalfaMedicago sativae0
Treatment
Sulfur fertilizatione0
Outcome
sulfur and nitrogen contente0
Direction
increasede0

Not reportedComparator

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

Medicago sativa
Medicago sativa · TaxonDrepanostoma · CC BY 4.0 · iNaturalist ↗

Verbatim

e0

“Sulfur fertilization increased the sulfur and nitrogen content and yield of alfalfa herbage”

✓ located verbatim in the source · abstract, characters 9–100 · show in text ↑
Intervention effectobservedoriginal resultpositivemeasured

Claim · model-written summary

Sulfur fertilization increased herbage nitrogen content.

Taxon
alfalfaMedicago sativae0
Treatment
Sulfur fertilizatione0
Outcome
nitrogen contente0
Direction
increasede0

Not reportedComparator

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

Medicago sativa
Medicago sativa · TaxonDrepanostoma · CC BY 4.0 · iNaturalist ↗

Verbatim

e0

“Sulfur fertilization increased the sulfur and nitrogen content and yield of alfalfa herbage”

✓ located verbatim in the source · abstract, characters 9–100 · show in text ↑
Intervention effectobservedoriginal resultpositivemeasured

Claim · model-written summary

Sulfur fertilization increased herbage yield.

Taxon
alfalfaMedicago sativae0
Treatment
Sulfur fertilizatione0
Outcome
yield of alfalfa herbagee0
Direction
increasede0

Not reportedComparator

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

Medicago sativa
Medicago sativa · TaxonDrepanostoma · CC BY 4.0 · iNaturalist ↗

Verbatim

e0

“Sulfur fertilization increased the sulfur and nitrogen content and yield of alfalfa herbage”

✓ located verbatim in the source · abstract, characters 9–100 · show in text ↑
Observationobservedoriginal resultmeasured

Claim · model-written summary

Herbage sulfur percentage was highest in young growth and declined almost linearly in deficient and nondeficient plants.

Taxon
AlfalfaMedicago sativat0
Organ / stage
young growthe0
Outcome
Percent sulfure0
Direction
declinede0

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

Medicago sativa
Medicago sativa · TaxonDrepanostoma · CC BY 4.0 · iNaturalist ↗

Verbatim

e0

“Percent sulfur was highest in the young growth and declined at a near linear rate for both deficient and nondeficient plants”

✓ located verbatim in the source · abstract, characters 102–226 · show in text ↑
t0

“Alfalfa”

✓ located verbatim in the source · title, characters 31–38 · show in text ↑
Observationobservedoriginal resultmeasured

Claim · model-written summary

The nitrogen to sulfur ratio was nearly constant across growth stages.

Taxon
AlfalfaMedicago sativat0
Outcome
nitrogen to sulfur ratio in the herbagee0
Direction
nearly constante0

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

Medicago sativa
Medicago sativa · TaxonDrepanostoma · CC BY 4.0 · iNaturalist ↗

Verbatim

e0

“The nitrogen to sulfur ratio in the herbage was nearly constant at all stages of growth”

✓ located verbatim in the source · abstract, characters 341–428 · show in text ↑
t0

“Alfalfa”

✓ located verbatim in the source · title, characters 31–38 · show in text ↑
Observationobservedoriginal resultmeasured

Claim · model-written summary

The nitrogen to sulfur ratio was narrower in nondeficient than sulfur-deficient herbage.

Taxon
AlfalfaMedicago sativat0
Outcome
narrowere0
Direction
narrowere0
Comparator
sulfur‐deficient herbagee0

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

Medicago sativa
Medicago sativa · TaxonDrepanostoma · CC BY 4.0 · iNaturalist ↗

Verbatim

e0

“was much narrower in the nondeficient than in sulfur‐deficient herbage”

✓ located verbatim in the source · abstract, characters 433–503 · show in text ↑
t0

“Alfalfa”

✓ located verbatim in the source · title, characters 31–38 · show in text ↑
Recommendationauthor interpretationoriginal resultbasis n/a

Claim · model-written summary

A critical herbage sulfur level should be tied to a definite growth stage.

Taxon
alfalfaMedicago sativae0
Outcome
critical level of sulfur in alfalfa herbage needs to be associated with a definite stage of growthe0

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

Medicago sativa
Medicago sativa · TaxonDrepanostoma · CC BY 4.0 · iNaturalist ↗

Verbatim

e0

“The use of a critical level of sulfur in alfalfa herbage needs to be associated with a definite stage of growth”

✓ located verbatim in the source · abstract, characters 228–339 · show in text ↑

sulfur atom · nutrient: content · Medicago sativa (alfalfa)Results differ

10 papers: 7 positive, 3 negative or no effect

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

  1. positive
  2. no effect
  3. no effect

6 papers more in this group

See all 10 papers →

sulfur atom · yield · Medicago sativa (alfalfa)Results differ

16 papers: 11 positive, 5 negative or no effect

10 papers in the same direction as this paper · 5 in the opposite direction

  1. positive
  2. no effect
  3. no effect

12 papers more in this group

See all 16 papers →

fertilization · nutrient: content · Medicago sativa (alfalfa)Positive and negative results

59 papers: 49 positive, 10 negative or no effect

48 papers in the same direction as this paper · 9 in the opposite direction · 1 reporting no difference from an alternative

  1. positive
  2. no effect
  3. negative

55 papers more in this group

See all 59 papers →

fertilization · yield · Medicago sativa (alfalfa)Positive and negative results

184 papers: 151 positive, 33 negative or no effect

150 papers in the same direction as this paper · 30 in the opposite direction · 3 reporting no difference from an alternative

  1. no effect
  2. no effect
  3. 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.