Abstract
SummaryData are examined from an apple trial over a period of sixteen years during which the trees received no differential treatments. Crops for a varying number of years were accumulated in order to determine how long a period is needed to obtain a low coefficient of variation. Four years were better than two, but six years gave little advantage over four. Covariance by previous crops was useful, two years’ crop being as good as four years’ crop. Adjustment by trunk girth was less successful but could be recommended in conjunction with previous crop. Number of fruits was a more variable record than crop weight. Removing positional variation by analysis of variance did not have a major effect in reducing variation. Where space is available multi-tree plots proved effective since adjacent tree crops are not highly correlated, but covariance adjustment of multi-tree plots was not successful.
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Claims 8
Claim · model-written summary
In an apple trial, accumulating four years of crops gave a lower coefficient of variation than two years.
- Taxon
- Apple
Malus domesticat0 - Outcome
- coefficient of variatione7
- Direction
- bettere0
- Comparator
- twoe0
Organisms pictured · Representative pictures of the matched species, not figures from the paper.
Verbatim
t0“Apple Trials”
e0“Four years were better than two”
e7“obtain a low coefficient of variation”
Claim · model-written summary
Accumulating six years of crops gave little advantage over four years in reducing the coefficient of variation.
- Taxon
- AppleMalus domesticat0
- Outcome
- coefficient of variatione7
- Direction
- little advantagee0
- Comparator
- foure0
Organisms pictured · Representative pictures of the matched species, not figures from the paper.
Verbatim
t0“Apple Trials”
e0“six years gave little advantage over four”
e7“obtain a low coefficient of variation”
Claim · model-written summary
Covariance adjustment by previous crops was useful, with two years of previous crop as good as four years.
- Taxon
- AppleMalus domesticat0
- Outcome
- usefule0
- Direction
- as good ase0
- Comparator
- four years’ crope0
Organisms pictured · Representative pictures of the matched species, not figures from the paper.
Verbatim
t0“Apple Trials”
e0“Covariance by previous crops was useful, two years’ crop being as good as four years’ crop”
Claim · model-written summary
Adjustment by trunk girth was less successful than previous-crop covariance but could be recommended in conjunction with previous crop.
- Taxon
- AppleMalus domesticat0
- Outcome
- Adjustment by trunk girthe0
- Direction
- less successfule0
- Comparator
- previous crope0
Organisms pictured · Representative pictures of the matched species, not figures from the paper.
Verbatim
t0“Apple Trials”
e0“Adjustment by trunk girth was less successful but could be recommended in conjunction with previous crop”
Claim · model-written summary
Number of fruits was a more variable record than crop weight.
- Taxon
- AppleMalus domesticat0
- Outcome
- Number of fruitse0
- Direction
- more variablee0
- Comparator
- crop weighte0
Organisms pictured · Representative pictures of the matched species, not figures from the paper.
Verbatim
t0“Apple Trials”
e0“Number of fruits was a more variable record than crop weight”
Claim · model-written summary
Removing positional variation by analysis of variance did not have a major effect in reducing variation.
- Taxon
- AppleMalus domesticat0
- Outcome
- reducing variatione0
- Direction
- did not have a major effecte0
- Comparator
- analysis of variancee0
Organisms pictured · Representative pictures of the matched species, not figures from the paper.
Verbatim
t0“Apple Trials”
e0“Removing positional variation by analysis of variance did not have a major effect in reducing variation”
Claim · model-written summary
Multi-tree plots proved effective in reducing variation, since adjacent tree crops are not highly correlated.
- Taxon
- AppleMalus domesticat0
- Outcome
- multi-tree plots proved effectivee0
- Comparator
- adjacent tree cropse0
Organisms pictured · Representative pictures of the matched species, not figures from the paper.
Verbatim
t0“Apple Trials”
e0“multi-tree plots proved effective since adjacent tree crops are not highly correlated”
Claim · model-written summary
Covariance adjustment of multi-tree plots was not successful.
- Taxon
- AppleMalus domesticat0
- Outcome
- covariance adjustment of multi-tree plotse0
- Direction
- not successfule0
- Comparator
- multi-tree plotse0
Organisms pictured · Representative pictures of the matched species, not figures from the paper.
Verbatim
t0“Apple Trials”
e0“covariance adjustment of multi-tree plots was not successful”