Abstract
Abstract The relationship between topdressing rate and Cu concentration in lucerne grown on Hinemaiaia sand was investigated using dressings of 0, 0.5, 1, 1.5, 2, and 4 kg Cu/ha. The changes in Cu concentration in the foliage over two years, with three harvests in each, are reported. Differences between years, and among treatments, were significant. In the first year, 4 kg Cu/ha increased the average harvest concentration from 3.6 to 6.7 ppm Cu. In the second year, the effect from 4 kg Cu/ha applied only in year 1, was as good as that from 2 and from 4 kg Cu/ha applied in both years. Cu application did not increase yield. The annual DM production was 11 960 kg/ha in year 1, and 11 780 kg/ha in year 2.
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Claims 6
Claim · model-written summary
Foliage copper concentration differed significantly between years and treatments.
- Taxon
- lucerne
Medicago sativat0 - Treatment
- treatmentse0
- Outcome
- Cu concentration in the foliagee1
Not reportedDirection
Organisms pictured · Representative pictures of the matched species, not figures from the paper.
Verbatim
e0“Differences between years, and among treatments, were significant.”
t0“lucerne”
e1“The changes in Cu concentration in the foliage over two years”
Claim · model-written summary
In year 1, 4 kg Cu/ha increased mean harvest copper concentration from 3.6 to 6.7 ppm Cu.
- Taxon
- lucerneMedicago sativat0
- Treatment
- 4 kg Cu/hae0
- Outcome
- average harvest concentratione0
- Direction
- increasede0
- Value
- 6.7 ppm Cue0
- Qualifier
- first yeare0
- Comparator
- 3.6e0
Organisms pictured · Representative pictures of the matched species, not figures from the paper.
Verbatim
e0“In the first year, 4 kg Cu/ha increased the average harvest concentration from 3.6 to 6.7 ppm Cu.”
t0“lucerne”
Claim · model-written summary
A single first-year 4 kg Cu/ha application matched repeated applications in second-year effect.
- Taxon
- lucerneMedicago sativat0
- Treatment
- 4 kg Cu/ha applied only in year 1e0
- Outcome
- the effecte0
- Direction
- as good ase0
- Comparator
- 2 and from 4 kg Cu/ha applied in both yearse0
Organisms pictured · Representative pictures of the matched species, not figures from the paper.
Verbatim
e0“In the second year, the effect from 4 kg Cu/ha applied only in year 1, was as good as that from 2 and from 4 kg Cu/ha applied in both years.”
t0“lucerne”
Claim · model-written summary
Copper application did not increase lucerne yield.
- Taxon
- lucerneMedicago sativat0
- Treatment
- Cu applicatione0
- Outcome
- yielde0
- Direction
- did not increasee0
Not reportedComparator
Organisms pictured · Representative pictures of the matched species, not figures from the paper.
Verbatim
e0“Cu application did not increase yield.”
t0“lucerne”
Claim · model-written summary
Annual DM production was 11 960 kg/ha in year 1.
- Taxon
- lucerneMedicago sativat0
- Outcome
- annual DM productione0
- Value
- 11 960 kg/hae0
- Qualifier
- year 1e0
Organisms pictured · Representative pictures of the matched species, not figures from the paper.
Verbatim
e0“The annual DM production was 11 960 kg/ha in year 1, and 11 780 kg/ha in year 2.”
t0“lucerne”
Claim · model-written summary
Annual DM production was 11 780 kg/ha in year 2.
- Taxon
- lucerneMedicago sativat0
- Outcome
- annual DM productione0
- Value
- 11 780 kg/hae0
- Qualifier
- year 2e0
Organisms pictured · Representative pictures of the matched species, not figures from the paper.
Verbatim
e0“The annual DM production was 11 960 kg/ha in year 1, and 11 780 kg/ha in year 2.”
t0“lucerne”
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
- no effect
- positive
- 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.