Abstract
1. The effects of annual applications of 0–12 cwt. per acre of sulphate of ammonia on the herbage levels and yields of sulphate sulphur and total sulphur were investigated in four seeds mixtures 1 year and 4 years after seeding down. 2. There were significant increases in the levels and yields of both forms of sulphur up to the 2 or 4 cwt. per acre level of application in both years. The maximum values occurred at the 6 or 8 cwt. level and the corresponding values at the 12 cwt. per acre rate of application declined in many cases. 3. The cumulative effects of the annual dressings of sulphate of ammonia resulted in substantial increases of approximately 50% in the levels of sulphate sulphur and total sulphur with much smaller increases in the levels of non-sulphate sulphur. 4. Duplicate plots which received 2, 4 and 6 cwt. per acre of sulphate of ammonia also received an additional 2 cwt. per acre immediately after the first cut each year. This splitting of the dressings had no significant effect on the accumulation of sulphur by any seeds mixture. A second cut from the cocksfoot plots in the first year showed the sulphur levels in the plots which received the additional sulphate of ammonia to have increased less than the levels in those which received only the initial dressing. This was explained in terms of the yields of the components. 5. There was a tendency for the rye-grass mixture to contain more sulphate than the other mixtures particularly in the fourth year. 6. The possible significance of the increases found in sulphate levels in the copper-molybdenum metabolism of grazing animals is discussed.
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Claims 10
Claim · model-written summary
Sulphate of ammonia increased sulphur levels through 2 or 4 cwt per acre.
- Taxon
- grass and clover mixturest0
- Treatment
- sulphure0
- Outcome
- levelse0
- Direction
- increasese0
- Qualifier
- 2 or 4 cwt. per acree0
Not reportedComparator
Verbatim
e0“There were significant increases in the levels and yields of both forms of sulphur up to the 2 or 4 cwt. per acre level of application in both years.”
t0“grass and clover mixtures”
Claim · model-written summary
Sulphate of ammonia increased sulphur yields through 2 or 4 cwt per acre.
- Taxon
- grass and clover mixturest0
- Treatment
- sulphure0
- Outcome
- yieldse0
- Direction
- increasese0
- Qualifier
- 2 or 4 cwt. per acree0
Not reportedComparator
Verbatim
e0“There were significant increases in the levels and yields of both forms of sulphur up to the 2 or 4 cwt. per acre level of application in both years.”
t0“grass and clover mixtures”
Claim · model-written summary
Sulphur measures peaked at 6 or 8 cwt per acre.
Verbatim
e0“The maximum values occurred at the 6 or 8 cwt. level and the corresponding values at the 12 cwt. per acre rate of application declined in many cases.”
t0“grass and clover mixtures”
Claim · model-written summary
Sulphur measures declined at 12 cwt per acre in many cases.
Verbatim
e0“The maximum values occurred at the 6 or 8 cwt. level and the corresponding values at the 12 cwt. per acre rate of application declined in many cases.”
t0“grass and clover mixtures”
Claim · model-written summary
Annual sulphate of ammonia increased sulphate sulphur.
- Taxon
- grass and clover mixturest0
- Treatment
- annual dressings of sulphate of ammoniae0
- Outcome
- sulphate sulphure0
- Direction
- increasese0
- Value
- 50%e0
Not reportedComparator
Verbatim
e0“The cumulative effects of the annual dressings of sulphate of ammonia resulted in substantial increases of approximately 50% in the levels of sulphate sulphur and total sulphur with much smaller increases in the levels of non-sulphate sulphur.”
t0“grass and clover mixtures”
Claim · model-written summary
Annual sulphate of ammonia increased total sulphur.
- Taxon
- grass and clover mixturest0
- Treatment
- annual dressings of sulphate of ammoniae0
- Outcome
- total sulphure0
- Direction
- increasese0
- Value
- 50%e0
Not reportedComparator
Verbatim
e0“The cumulative effects of the annual dressings of sulphate of ammonia resulted in substantial increases of approximately 50% in the levels of sulphate sulphur and total sulphur with much smaller increases in the levels of non-sulphate sulphur.”
t0“grass and clover mixtures”
Claim · model-written summary
Annual sulphate of ammonia increased non-sulphate sulphur.
- Taxon
- grass and clover mixturest0
- Treatment
- annual dressings of sulphate of ammoniae0
- Outcome
- non-sulphate sulphure0
- Direction
- increasese0
Not reportedComparatorValue
Verbatim
e0“The cumulative effects of the annual dressings of sulphate of ammonia resulted in substantial increases of approximately 50% in the levels of sulphate sulphur and total sulphur with much smaller increases in the levels of non-sulphate sulphur.”
t0“grass and clover mixtures”
Claim · model-written summary
Splitting sulphate dressings did not significantly affect sulphur accumulation.
- Taxon
- grass and clover mixturest0
- Treatment
- splitting of the dressingse0
- Outcome
- accumulation of sulphure0
- Direction
- no significant effecte0
Not reportedComparator
Verbatim
e0“This splitting of the dressings had no significant effect on the accumulation of sulphur by any seeds mixture.”
t0“grass and clover mixtures”
Claim · model-written summary
Additional sulphate after the first cut produced a smaller sulphur increase in cocksfoot.
- Taxon
- cocksfoot
.jpg?width=60)
Dactylis glomeratae0 - Treatment
- additional sulphate of ammoniae0
- Outcome
- sulphur levelse0
- Direction
- increased lesse0
- Comparator
- only the initial dressinge0
Organisms pictured · Representative pictures of the matched species, not figures from the paper.
.jpg?width=500)
Verbatim
e0“A second cut from the cocksfoot plots in the first year showed the sulphur levels in the plots which received the additional sulphate of ammonia to have increased less than the levels in those which received only the initial dressing.”
Claim · model-written summary
Rye-grass mixture tended to contain more sulphate than other mixtures.
LoliumOrganisms pictured · Representative pictures of the matched species, not figures from the paper.
Verbatim
e0“There was a tendency for the rye-grass mixture to contain more sulphate than the other mixtures particularly in the fourth year.”
The same questions in other papers
ammonium sulfate · nutrient: content · Dactylis glomerata (cocksfoot)Results agree
1 paper in the same direction as this paper
- no effect
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.