Abstract
Abstract In an investigation of the fertiliser requirements of dryland lucerne in Canterbury, results from two field trials showed significant yield responses to applied copper. The responses appear to be the first recorded in dryland lucerne in Canterbury. Levels of herbage copper on these responsive sites were low (1–2 ppm in dry matter). Topdressing with approximately 2 kg/ha of copper as CuCl 2 or CuSO 4 raised herbage levels to 5–6 ppm on both copper‐deficient stands. A survey of lucerne stands in Ashburton County indicated marginally adequate copper levels for satisfactory lucerne growth on the Eyre and Lismore soils.
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Claims 5
Claim · model-written summary
Applied copper produced significant lucerne yield responses in two field trials.
- Taxon
- lucerne
Medicago sativat0 - Treatment
- applied coppere0
- Outcome
- yield responsese0
- Direction
- responsese0
- Setting
- field trialse0
Not reportedComparator
Organisms pictured · Representative pictures of the matched species, not figures from the paper.
Verbatim
t0“lucerne”
e0“results from two field trials showed significant yield responses to applied copper.”
Claim · model-written summary
Herbage copper was low at responsive sites.
- Taxon
- lucerneMedicago sativat0
- Outcome
- Levels of herbage coppere0
- Direction
- lowe0
- Value
- 1–2 ppm in dry mattere0
Organisms pictured · Representative pictures of the matched species, not figures from the paper.
Verbatim
t0“lucerne”
e0“Levels of herbage copper on these responsive sites were low (1–2 ppm in dry matter).”
Claim · model-written summary
Copper chloride topdressing raised herbage copper to 5–6 ppm.
- Taxon
- lucerneMedicago sativat0
- Treatment
- approximately 2 kg/ha of copper as CuCl 2e0
- Outcome
- herbage levelse0
- Direction
- raisede0
- Value
- 5–6 ppme0
Not reportedComparator
Organisms pictured · Representative pictures of the matched species, not figures from the paper.
Verbatim
t0“lucerne”
e0“Topdressing with approximately 2 kg/ha of copper as CuCl 2 or CuSO 4 raised herbage levels to 5–6 ppm on both copper‐deficient stands.”
Claim · model-written summary
Copper sulfate topdressing raised herbage copper to 5–6 ppm.
- Taxon
- lucerneMedicago sativat0
- Treatment
- CuSO 4e0
- Outcome
- herbage levelse0
- Direction
- raisede0
- Value
- 5–6 ppme0
Not reportedComparator
Organisms pictured · Representative pictures of the matched species, not figures from the paper.
Verbatim
t0“lucerne”
e0“Topdressing with approximately 2 kg/ha of copper as CuCl 2 or CuSO 4 raised herbage levels to 5–6 ppm on both copper‐deficient stands.”
Claim · model-written summary
Surveyed lucerne stands had marginally adequate copper levels on Eyre and Lismore soils.
- Taxon
- lucerneMedicago sativae0
- Outcome
- marginally adequate copper levelse0
- Qualifier
- Eyre and Lismore soilse0
- Setting
- Ashburton Countye0
Organisms pictured · Representative pictures of the matched species, not figures from the paper.
Verbatim
e0“A survey of lucerne stands in Ashburton County indicated marginally adequate copper levels for satisfactory lucerne growth on the Eyre and Lismore soils.”
The same questions in other papers
copper atom · yield · Medicago sativa (alfalfa)Results differ
5 papers in the same direction as this paper · 7 in the opposite direction
- positive
- no effect
- no effect
9 papers more in this group
See all 13 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.