Abstract
SUMMARY Three granular nitrophosphates containing 5, 26 and 50 % of their total phosphorus in a water-soluble form, granular potassium metaphosphate, Gafsa rock phosphate and basic slag (both as powders) were compared with granular superphosphate and powdered dicalcium phosphate as standards in two annual experiments with ryegrass and in three experiments with barley. In 1960 total yields of ryegrass during a whole season were similar with all fertilizers. Nitrophosphate-5, Gafsa rock phosphate and basic slag acted more slowly than granular superphosphate and grass grew less well and took up less phosphorus during the first 12 weeks. Over the whole growing season more phosphorus was taken up by grass from powdered dicalcium phosphate and from granular potassium metaphosphate (0.5–2.0 mm) than from granular superphosphate (1.0–4.0 mm). Powdered dicalcium phosphate was equivalent to about 60% as much phosphorus applied as superphosphate to barley. Rock phosphate was almost inert and percentage granular superphosphate equivalents of basic slag and potassium metaphosphate were 22 and 23% respectively. Percentage superphosphate equivalents of the granular nitrophosphates were 1, 25 and 53% and almost equal to the water-soluble phosphate they contained.
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 14
Claim · model-written summary
Ryegrass season yield was similar with all fertilizers.
LoliumNot reportedComparator
Organisms pictured · Representative pictures of the matched species, not figures from the paper.
Verbatim
e0“In 1960 total yields of ryegrass during a whole season were similar with all fertilizers”
t0“ryegrass”
Claim · model-written summary
Nitrophosphate-5 caused slower initial ryegrass growth than superphosphate.
- Treatment
- Nitrophosphate-5e0
- Outcome
- grass grewe0
- Direction
- less welle0
- Qualifier
- first 12 weekse0
- Comparator
- granular superphosphatee0
Organisms pictured · Representative pictures of the matched species, not figures from the paper.
Verbatim
e0“Nitrophosphate-5, Gafsa rock phosphate and basic slag acted more slowly than granular superphosphate and grass grew less well and took up less phosphorus during the first 12 weeks”
t0“ryegrass”
Claim · model-written summary
Gafsa rock phosphate caused slower initial ryegrass growth than superphosphate.
- Treatment
- Gafsa rock phosphatee0
- Outcome
- grass grewe0
- Direction
- less welle0
- Qualifier
- first 12 weekse0
- Comparator
- granular superphosphatee0
Organisms pictured · Representative pictures of the matched species, not figures from the paper.
Verbatim
e0“Nitrophosphate-5, Gafsa rock phosphate and basic slag acted more slowly than granular superphosphate and grass grew less well and took up less phosphorus during the first 12 weeks”
t0“ryegrass”
Claim · model-written summary
Basic slag caused slower initial ryegrass growth than superphosphate.
- Treatment
- basic slage0
- Outcome
- grass grewe0
- Direction
- less welle0
- Qualifier
- first 12 weekse0
- Comparator
- granular superphosphatee0
Organisms pictured · Representative pictures of the matched species, not figures from the paper.
Verbatim
e0“Nitrophosphate-5, Gafsa rock phosphate and basic slag acted more slowly than granular superphosphate and grass grew less well and took up less phosphorus during the first 12 weeks”
t0“ryegrass”
Claim · model-written summary
Nitrophosphate-5 reduced early grass phosphorus uptake compared with superphosphate.
- Treatment
- Nitrophosphate-5e0
- Outcome
- took up less phosphoruse0
- Direction
- lesse0
- Comparator
- granular superphosphatee0
Organisms pictured · Representative pictures of the matched species, not figures from the paper.
Verbatim
e0“Nitrophosphate-5, Gafsa rock phosphate and basic slag acted more slowly than granular superphosphate and grass grew less well and took up less phosphorus during the first 12 weeks”
t0“ryegrass”
Claim · model-written summary
Gafsa rock phosphate reduced early grass phosphorus uptake compared with superphosphate.
- Treatment
- Gafsa rock phosphatee0
- Outcome
- took up less phosphoruse0
- Direction
- lesse0
- Comparator
- granular superphosphatee0
Organisms pictured · Representative pictures of the matched species, not figures from the paper.
Verbatim
e0“Nitrophosphate-5, Gafsa rock phosphate and basic slag acted more slowly than granular superphosphate and grass grew less well and took up less phosphorus during the first 12 weeks”
t0“ryegrass”
Claim · model-written summary
Basic slag reduced early grass phosphorus uptake compared with superphosphate.
- Treatment
- basic slage0
- Outcome
- took up less phosphoruse0
- Direction
- lesse0
- Comparator
- granular superphosphatee0
Organisms pictured · Representative pictures of the matched species, not figures from the paper.
Verbatim
e0“Nitrophosphate-5, Gafsa rock phosphate and basic slag acted more slowly than granular superphosphate and grass grew less well and took up less phosphorus during the first 12 weeks”
t0“ryegrass”
Claim · model-written summary
Powdered dicalcium phosphate yielded more season-long phosphorus uptake than superphosphate.
- Treatment
- powdered dicalcium phosphatee0
- Outcome
- more phosphorus was taken upe0
- Direction
- moree0
- Comparator
- granular superphosphatee0
Organisms pictured · Representative pictures of the matched species, not figures from the paper.
Verbatim
e0“more phosphorus was taken up by grass from powdered dicalcium phosphate and from granular potassium metaphosphate (0.5–2.0 mm) than from granular superphosphate (1.0–4.0 mm)”
t0“ryegrass”
Claim · model-written summary
Granular potassium metaphosphate yielded more season-long phosphorus uptake than superphosphate.
- Treatment
- granular potassium metaphosphatee0
- Outcome
- more phosphorus was taken upe0
- Direction
- moree0
- Comparator
- granular superphosphatee0
Organisms pictured · Representative pictures of the matched species, not figures from the paper.
Verbatim
e0“more phosphorus was taken up by grass from powdered dicalcium phosphate and from granular potassium metaphosphate (0.5–2.0 mm) than from granular superphosphate (1.0–4.0 mm)”
t0“ryegrass”
Claim · model-written summary
Powdered dicalcium phosphate had about 60% superphosphate-equivalent value for barley.
- Taxon
- barley
.jpg?width=60)
Hordeum vulgaree0 - Treatment
- Powdered dicalcium phosphatee0
- Outcome
- equivalente0
- Value
- 60%e0
- Comparator
- superphosphatee0
Organisms pictured · Representative pictures of the matched species, not figures from the paper.
.jpg?width=500)
Verbatim
e0“Powdered dicalcium phosphate was equivalent to about 60% as much phosphorus applied as superphosphate to barley”
Claim · model-written summary
Rock phosphate was almost inert for barley.
- Taxon
- barleyHordeum vulgaret0
- Treatment
- Rock phosphatee0
- Outcome
- almost inerte0
Organisms pictured · Representative pictures of the matched species, not figures from the paper.
Verbatim
e0“Rock phosphate was almost inert”
t0“barley”
Claim · model-written summary
Basic slag had 22% superphosphate-equivalent value for barley.
- Taxon
- barleyHordeum vulgaret0
- Treatment
- basic slage0
- Outcome
- superphosphate equivalentse0
- Value
- 22e0
Organisms pictured · Representative pictures of the matched species, not figures from the paper.
Verbatim
e0“percentage granular superphosphate equivalents of basic slag and potassium metaphosphate were 22 and 23% respectively”
t0“barley”
Claim · model-written summary
Potassium metaphosphate had 23% superphosphate-equivalent value for barley.
- Taxon
- barleyHordeum vulgaret0
- Treatment
- potassium metaphosphatee0
- Outcome
- superphosphate equivalentse0
- Value
- 23%e0
Organisms pictured · Representative pictures of the matched species, not figures from the paper.
Verbatim
e0“percentage granular superphosphate equivalents of basic slag and potassium metaphosphate were 22 and 23% respectively”
t0“barley”
Claim · model-written summary
Three granular nitrophosphates had superphosphate equivalents of 1, 25 and 53%, nearly matching their water-soluble phosphate.
- Taxon
- barleyHordeum vulgaret0
- Treatment
- granular nitrophosphatese0
- Outcome
- Percentage superphosphate equivalentse0
- Value
- 1, 25 and 53%e0
Organisms pictured · Representative pictures of the matched species, not figures from the paper.
Verbatim
e0“Percentage superphosphate equivalents of the granular nitrophosphates were 1, 25 and 53% and almost equal to the water-soluble phosphate they contained”
t0“barley”
The same questions in other papers
fertilization · yield · LoliumPositive and negative results
11 papers in the same direction as this paper · 38 in the opposite direction
- positive
- positive
- positive
46 papers more in this group
See all 50 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.