Abstract
Abstract The flake size of ammonia‐treated vermiculite (ATV) controlled the release of ammonium ions to plants, the smaller the flake the more rapid the release. Nitrogen released from fine ATV (0.25–0.5 mm) produced a yield of oats superior to that obtained using either ammonium nitrate or ammonium sulphate; it also gave a 10% greater oven‐dry weight of potatoes than did either ammonium nitrate or IBDU, the slow‐release N fertiliser, and 7% greater than sulphur‐coated urea. Coarse ATV (2.8–4.0 mm) gave significantly smaller yields of oats and potatoes than did any of the other N fertilisers. With ryegrass, the slower release of N from the coarse ATV gave three relatively uniform intermediate yields over the season compared with two high and one low with ammonium nitrate, ammonium sulphate and fine ATV. This suggests a possible application in grassland management.
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Claims 7
Claim · model-written summary
Nitrogen released from fine ATV produced a yield of oats superior to ammonium nitrate or ammonium sulphate.
- Taxon
- oats
Avena sativae1 - Treatment
- fine ATVe1
- Outcome
- yield of oatse1
- Direction
- superiore1
- Qualifier
- 0.25–0.5 mme1
- Comparator
- ammonium nitrate or ammonium sulphatee1
Organisms pictured · Representative pictures of the matched species, not figures from the paper.
Verbatim
e1“Nitrogen released from fine ATV (0.25–0.5 mm) produced a yield of oats superior to that obtained using either ammonium nitrate or ammonium sulphate”
Claim · model-written summary
Nitrogen released from fine ATV gave a 10% greater oven-dry weight of potatoes than ammonium nitrate or IBDU.
- Taxon
- potatoes
Solanum tuberosume2 - Treatment
- fine ATVe3
- Outcome
- oven‐dry weighte2
- Direction
- greatere2
- Value
- 10%e2
- Comparator
- ammonium nitrate or IBDUe2
Organisms pictured · Representative pictures of the matched species, not figures from the paper.
Verbatim
e2“it also gave a 10% greater oven‐dry weight of potatoes than did either ammonium nitrate or IBDU”
e3“Nitrogen released from fine ATV (0.25–0.5 mm)”
Claim · model-written summary
Nitrogen released from fine ATV gave a 7% greater oven-dry weight of potatoes than sulphur-coated urea.
- Taxon
- potatoesSolanum tuberosume2
- Treatment
- fine ATVe3
- Outcome
- oven‐dry weighte2
- Direction
- greatere4
- Value
- 7%e4
- Comparator
- sulphur‐coated ureae4
Organisms pictured · Representative pictures of the matched species, not figures from the paper.
Verbatim
e2“it also gave a 10% greater oven‐dry weight of potatoes than did either ammonium nitrate or IBDU”
e3“Nitrogen released from fine ATV (0.25–0.5 mm)”
e4“and 7% greater than sulphur‐coated urea”
Claim · model-written summary
Coarse ATV gave significantly smaller oat yields than any of the other N fertilisers.
- Taxon
- oatsAvena sativae5
- Treatment
- Coarse ATVe5
- Outcome
- yieldse5
- Direction
- smallere5
- Comparator
- any of the other N fertiliserse5
Organisms pictured · Representative pictures of the matched species, not figures from the paper.
Verbatim
e5“Coarse ATV (2.8–4.0 mm) gave significantly smaller yields of oats and potatoes than did any of the other N fertilisers”
Claim · model-written summary
Coarse ATV gave significantly smaller potato yields than any of the other N fertilisers.
- Taxon
- potatoesSolanum tuberosume5
- Treatment
- Coarse ATVe5
- Outcome
- yieldse5
- Direction
- smallere5
- Comparator
- any of the other N fertiliserse5
Organisms pictured · Representative pictures of the matched species, not figures from the paper.
Verbatim
e5“Coarse ATV (2.8–4.0 mm) gave significantly smaller yields of oats and potatoes than did any of the other N fertilisers”
Claim · model-written summary
With ryegrass, coarse ATV gave three relatively uniform intermediate yields over the season, compared with two high and one low under ammonium nitrate, ammonium sulphate and fine ATV.
- Treatment
- coarse ATVe6
- Outcome
- yields over the seasone6
- Qualifier
- three relatively uniform intermediate yieldse6
- Comparator
- ammonium nitrate, ammonium sulphate and fine ATVe6
LoliumOrganisms pictured · Representative pictures of the matched species, not figures from the paper.
Verbatim
e6“With ryegrass, the slower release of N from the coarse ATV gave three relatively uniform intermediate yields over the season compared with two high and one low with ammonium nitrate, ammonium sulphate and fine ATV”
Claim · model-written summary
The slow N release from coarse ATV suggests a possible application in grassland management.
- Outcome
- possible application in grassland managemente7
Organisms pictured · Representative pictures of the matched species, not figures from the paper.
Verbatim
e6“With ryegrass, the slower release of N from the coarse ATV gave three relatively uniform intermediate yields over the season compared with two high and one low with ammonium nitrate, ammonium sulphate and fine ATV”
e7“This suggests a possible application in grassland management”
The same questions in other papers
growing medium · yield · Solanum tuberosum (potato)Positive and negative results
2 papers in the same direction as this paper · 17 in the opposite direction
- positive
- positive
- positive
16 papers more in this group
See all 20 papers →growing medium · yield · Avena sativa (oats)Results agree
4 papers in the same direction as this paper
- positive
- positive
- positive
1 paper more in this group
See all 5 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.