Abstract
A severe deficiency of sulphur has been found in a soil derived from granite and another from basalt on the Northern Tablelands of New South Wales. Large increases in the growth of subterranean clover were obtained by the application of sulphates of sodium, magnesium, or calcium, equivalent to sulphur at a rate of 64 lb per acre, but about 85 per cent. of this increase was obtained with 30 lb per acre. The deficiency is thought to be widespread. There was no significant benefit on established clover from the application of phosphorus alone on either soil, nor did the combination of phosphorus with sulphur on the basaltic soil produce a greater yield than that obtained from sulphur alone. Clear evidence has been obtained that the residual value of sulphur, provided as calcium sulphate in superphosphate, is low on a pasture stocked heavily with sheep under Northern Tableland conditions. A marked decline in production due to sulphur deficiency occurred when annual dressings of 2 cwt superphosphate were discontinued in the third or fourth years. It is important when assessing the residual effect of superphosphate to appreciate the relative significance of the phosphorus and sulphur in the fertilizer and the factors governing the loss of sulphur, from the soil. Results obtained are discussed in relation to the influence of climatic conditions (especially rainfall) and land use (cultivation, stocking, and industrialization) on sulphur status.
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Claims 10
Claim · model-written summary
Sulphur deficiency was severe in granite derived soil.
- Taxon
- subterranean clover
Trifolium subterraneume1 - Outcome
- deficiency of sulphure0
- Setting
- soil derived from granitee0
Organisms pictured · Representative pictures of the matched species, not figures from the paper.
Verbatim
e0“A severe deficiency of sulphur has been found in a soil derived from granite”
e1“subterranean clover”
Claim · model-written summary
Sulphur deficiency was severe in basalt derived soil.
- Taxon
- subterranean cloverTrifolium subterraneume2
- Outcome
- deficiency of sulphure1
- Setting
- Northern Tablelands of New South Walese0
Organisms pictured · Representative pictures of the matched species, not figures from the paper.
Verbatim
e0“another from basalt on the Northern Tablelands of New South Wales”
e1“A severe deficiency of sulphur has been found in a soil derived from granite and another from basalt”
e2“subterranean clover”
Claim · model-written summary
Sodium sulphate increased subterranean clover growth at a sulphur equivalent rate of 64 lb per acre.
- Taxon
- subterranean cloverTrifolium subterraneume0
- Treatment
- sulphates of sodiume0
- Outcome
- growthe0
- Direction
- increasese0
- Value
- 64 lb per acree0
Not reportedComparator
Organisms pictured · Representative pictures of the matched species, not figures from the paper.
Verbatim
e0“Large increases in the growth of subterranean clover were obtained by the application of sulphates of sodium, magnesium, or calcium, equivalent to sulphur at a rate of 64 lb per acre”
Claim · model-written summary
Magnesium sulphate increased subterranean clover growth.
- Taxon
- subterranean cloverTrifolium subterraneume0
- Treatment
- magnesiume0
- Outcome
- growthe0
- Direction
- increasese0
- Value
- 64 lb per acree0
Not reportedComparator
Organisms pictured · Representative pictures of the matched species, not figures from the paper.
Verbatim
e0“Large increases in the growth of subterranean clover were obtained by the application of sulphates of sodium, magnesium, or calcium, equivalent to sulphur at a rate of 64 lb per acre”
Claim · model-written summary
Calcium sulphate increased subterranean clover growth.
- Taxon
- subterranean cloverTrifolium subterraneume0
- Treatment
- calciume0
- Outcome
- growthe0
- Direction
- increasese0
- Value
- 64 lb per acree0
Not reportedComparator
Organisms pictured · Representative pictures of the matched species, not figures from the paper.
Verbatim
e0“Large increases in the growth of subterranean clover were obtained by the application of sulphates of sodium, magnesium, or calcium, equivalent to sulphur at a rate of 64 lb per acre”
Claim · model-written summary
Thirty lb per acre sulphur achieved about 85 per cent of the growth increase.
- Taxon
- subterranean cloverTrifolium subterraneume1
- Treatment
- 30 lb per acree0
- Outcome
- growthe1
- Direction
- increasee0
- Value
- 85 per cent.e0
Not reportedComparator
Organisms pictured · Representative pictures of the matched species, not figures from the paper.
Verbatim
e0“about 85 per cent. of this increase was obtained with 30 lb per acre”
e1“growth of subterranean clover”
Claim · model-written summary
Phosphorus alone gave no significant benefit to established clover on either soil.
TrifoliumNot reportedComparator
Organisms pictured · Representative pictures of the matched species, not figures from the paper.
Verbatim
e0“There was no significant benefit on established clover from the application of phosphorus alone on either soil”
Claim · model-written summary
Phosphorus combined with sulphur gave no greater yield than sulphur alone on basaltic soil.
- Treatment
- combination of phosphorus with sulphure0
- Outcome
- yielde0
- Direction
- nor dide1
- Comparator
- sulphur alonee0
Organisms pictured · Representative pictures of the matched species, not figures from the paper.
Verbatim
e0“the combination of phosphorus with sulphur on the basaltic soil produce a greater yield than that obtained from sulphur alone”
e1“nor did the combination of phosphorus with sulphur”
e2“established clover”
Claim · model-written summary
Residual sulphur value was low under heavily sheep stocked pasture conditions.
Organisms pictured · Representative pictures of the matched species, not figures from the paper.
Verbatim
e0“residual value of sulphur, provided as calcium sulphate in superphosphate, is low on a pasture stocked heavily with sheep under Northern Tableland conditions”
e1“established clover”
Claim · model-written summary
Stopping annual superphosphate dressings in year three or four caused a marked production decline from sulphur deficiency.
- Treatment
- annual dressings of 2 cwt superphosphate were discontinuede0
- Outcome
- productione0
- Direction
- declinee0
- Qualifier
- third or fourth yearse0
Not reportedComparator
Organisms pictured · Representative pictures of the matched species, not figures from the paper.
Verbatim
e0“A marked decline in production due to sulphur deficiency occurred when annual dressings of 2 cwt superphosphate were discontinued in the third or fourth years.”
e1“established clover”
The same questions in other papers
sulfur atom · yield · TrifoliumPositive and negative results
2 reporting no difference from an alternative
- positive
- positive
calcium atom · growth · Trifolium subterraneumPositive and negative results
2 papers in the same direction as this paper · 1 in the opposite direction
- no effect
- positive
- positive
magnesium atom · growth · Trifolium subterraneumResults agree
1 paper in the same direction as this paper
- positive
phosphorus · yield · TrifoliumPositive and negative results
2 papers in the same direction as this paper · 13 in the opposite direction
- positive
- positive
- positive
12 papers more in this group
See all 16 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.