Abstract
SummaryMerton Worcester apple trees in pot culture were supplied for four consecutive years with N, P, Ca and K at two rates. Apples of this cultivar differed from those of cvs Cleopatra and Jonathan both in their response to nutrient supply variations and in the interrelationships among the levels of mineral elements in the fruit and bitter pit incidence at harvest. The association between fruit levels of N, P, K and Mg previously observed in the other two cultivars was absent in Merton. In two years a positive association appeared in Merton between K level and bitter pit incidence. Doubling the K supply reduced fruit Ca level and increased protein N level and bitter pit incidence. A threefold increase in the Ca supply had the opposite effect on each of these variables. Bitter pit incidence was not affected by doubling the P supply, but was increased by supplying extra N, some of which was in the form of ammonium ion. The differences found between Merton Worcester and the two cultivars studied previously under the same cultural conditions demonstrate that any conclusions in this area concerning apples in general are valid only if they are based on findings over a number of seasons in a wide range of cultivars.
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Claims 10
Claim · model-written summary
Merton Worcester apples differed from those of cvs Cleopatra and Jonathan in their response to nutrient supply variations.
- Taxon
- Apples
Malus domesticae1 - Outcome
- response to nutrient supply variationse1
- Comparator
- cvs Cleopatra and Jonathane1
Organisms pictured · Representative pictures of the matched species, not figures from the paper.
Verbatim
e1“Apples of this cultivar differed from those of cvs Cleopatra and Jonathan both in their response to nutrient supply variations”
Claim · model-written summary
The association between fruit levels of N, P, K and Mg seen in the other two cultivars was absent in Merton Worcester.
- Taxon
- apple treesMalus domesticae2
- Material
- Mertone1
- Outcome
- association between fruit levels of N, P, K and Mge1
Not reportedDirection
Organisms pictured · Representative pictures of the matched species, not figures from the paper.
Verbatim
e1“The association between fruit levels of N, P, K and Mg previously observed in the other two cultivars was absent in Merton”
e2“Merton Worcester apple trees”
Claim · model-written summary
In two years a positive association appeared in Merton Worcester between K level and bitter pit incidence.
- Taxon
- apple treesMalus domesticae2
- Material
- Mertone1
- Compound
- Ke1
- Outcome
- bitter pit incidencee1
- Direction
- positivee1
Organisms pictured · Representative pictures of the matched species, not figures from the paper.
Verbatim
e1“In two years a positive association appeared in Merton between K level and bitter pit incidence”
e2“Merton Worcester apple trees”
Claim · model-written summary
Doubling the K supply reduced fruit Ca level in Merton Worcester apple trees.
- Taxon
- apple treesMalus domesticae2
- Treatment
- Doubling the K supplye1
- Outcome
- fruit Ca levele1
- Direction
- reducede1
Not reportedComparator
Organisms pictured · Representative pictures of the matched species, not figures from the paper.
Verbatim
e1“Doubling the K supply reduced fruit Ca level”
e2“Merton Worcester apple trees”
Claim · model-written summary
Doubling the K supply increased protein N level and bitter pit incidence in Merton Worcester apple trees.
- Taxon
- apple treesMalus domesticae2
- Treatment
- Doubling the K supplye1
- Outcome
- protein N level and bitter pit incidencee1
- Direction
- increasede1
Not reportedComparator
Organisms pictured · Representative pictures of the matched species, not figures from the paper.
Verbatim
e1“Doubling the K supply reduced fruit Ca level and increased protein N level and bitter pit incidence”
e2“Merton Worcester apple trees”
Claim · model-written summary
A threefold increase in the Ca supply had the opposite effect to doubling K, increasing fruit Ca level.
- Taxon
- apple treesMalus domesticae3
- Treatment
- A threefold increase in the Ca supplye1
- Outcome
- fruit Ca levele2
- Direction
- increaseinferrede1
- Qualifier
- opposite effecte1
Not reportedComparator
Organisms pictured · Representative pictures of the matched species, not figures from the paper.
Verbatim
e1“A threefold increase in the Ca supply had the opposite effect on each of these variables”
e2“Doubling the K supply reduced fruit Ca level”
e3“Merton Worcester apple trees”
Claim · model-written summary
A threefold increase in the Ca supply had the opposite effect to doubling K, decreasing protein N level and bitter pit incidence.
- Taxon
- apple treesMalus domesticae3
- Treatment
- A threefold increase in the Ca supplye1
- Outcome
- protein N level and bitter pit incidencee2
- Direction
- decreaseinferrede1
- Qualifier
- opposite effecte1
Not reportedComparator
Organisms pictured · Representative pictures of the matched species, not figures from the paper.
Verbatim
e1“A threefold increase in the Ca supply had the opposite effect on each of these variables”
e2“Doubling the K supply reduced fruit Ca level and increased protein N level and bitter pit incidence”
e3“Merton Worcester apple trees”
Claim · model-written summary
Bitter pit incidence was not affected by doubling the P supply.
- Taxon
- apple treesMalus domesticae2
- Treatment
- doubling the P supplye1
- Outcome
- Bitter pit incidencee1
- Direction
- not affectede1
Not reportedComparator
Organisms pictured · Representative pictures of the matched species, not figures from the paper.
Verbatim
e1“Bitter pit incidence was not affected by doubling the P supply”
e2“Merton Worcester apple trees”
Claim · model-written summary
Bitter pit incidence was increased by supplying extra N, some of which was in the form of ammonium ion.
- Taxon
- apple treesMalus domesticae2
- Treatment
- supplying extra N, some of which was in the form of ammonium ione1
- Outcome
- Bitter pit incidencee1
- Direction
- increasede1
Not reportedComparator
Organisms pictured · Representative pictures of the matched species, not figures from the paper.
Verbatim
e1“Bitter pit incidence was not affected by doubling the P supply, but was increased by supplying extra N, some of which was in the form of ammonium ion”
e2“Merton Worcester apple trees”
Claim · model-written summary
The authors conclude that conclusions about apples in general are valid only if based on findings over a number of seasons in a wide range of cultivars.
- Taxon
- applesMalus domesticae1
- Outcome
- valid only if they are based on findings over a number of seasons in a wide range of cultivarse1
Organisms pictured · Representative pictures of the matched species, not figures from the paper.
Verbatim
e1“any conclusions in this area concerning apples in general are valid only if they are based on findings over a number of seasons in a wide range of cultivars”
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