Abstract
The paper gives an account of the results obtained from the data provided by the first three years of the Sampling Observations on Wheat of the Crop-Weather Scheme. Section I describes the Sampling Observations on Wheat of the Crop Weather Scheme which have been initiated in order that the effect of weather conditions may be studied at all stages of the wheat crop’s growth from germination to maturity. In Section II several curves are given which illustrate the progress of the wheat crop. The shoot-number curves bear a marked resemblance to one another subsequent to the period when the shoot number is a maximum in spite of the wide divergences which exist between the maximum shoot numbers themselves. Section III indicates the statistical processes involved in the analyses given in the succeeding sections. Sections IV-VIII are devoted primarily to discussions of the effects of various meteorological factors on specific stages of the crop’s growth. The following results have emerged: The length of the interval from sowing to appearance above ground is shown to be largely dependent on the mean soil temperature during this interval, the relation being well expressed by a quadratic regression. The growth rates of the plants at this time are shown to be in good agreement with those which would be obtained by applying Van ‘t Hoff’s law. Neither the rainfall nor the variation in temperature during the period appear to affect its length. Squarehead’s Master appears above ground consistently later than Yeoman, but the amount of this lag is apparently uninfluenced by variations in soil temperature.
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Claims 7
Claim · model-written summary
Shoot-number curves resembled one another after their maxima despite varying maxima.
- Taxon
- wheat
Triticum aestivumt0 - Outcome
- shoot-number curvese0
- Qualifier
- marked resemblancee0
Organisms pictured · Representative pictures of the matched species, not figures from the paper.
Verbatim
e0“The shoot-number curves bear a marked resemblance to one another subsequent to the period when the shoot number is a maximum in spite of the wide divergences which exist between the maximum shoot numbers themselves.”
t0“wheat”
Claim · model-written summary
Time from sowing to emergence depended on mean soil temperature, with a quadratic relation.
- Taxon
- wheatTriticum aestivumt0
- Treatment
- mean soil temperaturee0
- Outcome
- length of the interval from sowing to appearance above grounde0
Not reportedDirection
Organisms pictured · Representative pictures of the matched species, not figures from the paper.
Verbatim
e0“The length of the interval from sowing to appearance above ground is shown to be largely dependent on the mean soil temperature during this interval, the relation being well expressed by a quadratic regression.”
t0“wheat”
Claim · model-written summary
Observed growth rates agreed with those predicted by Van ‘t Hoff’s law.
- Taxon
- wheatTriticum aestivumt0
- Outcome
- growth ratese0
- Comparator
- Van ‘t Hoff’s lawe0
Organisms pictured · Representative pictures of the matched species, not figures from the paper.
Verbatim
e0“The growth rates of the plants at this time are shown to be in good agreement with those which would be obtained by applying Van ‘t Hoff’s law.”
t0“wheat”
Claim · model-written summary
rainfall did not appear to affect time to emergence.
- Taxon
- wheatTriticum aestivumt0
- Treatment
- rainfalle0
- Outcome
- lengthe0
- Direction
- Neithere0
Organisms pictured · Representative pictures of the matched species, not figures from the paper.
Verbatim
e0“Neither the rainfall nor the variation in temperature during the period appear to affect its length.”
t0“wheat”
Claim · model-written summary
variation in temperature did not appear to affect time to emergence.
- Taxon
- wheatTriticum aestivumt0
- Treatment
- variation in temperaturee0
- Outcome
- lengthe0
- Direction
- Neithere0
Organisms pictured · Representative pictures of the matched species, not figures from the paper.
Verbatim
e0“Neither the rainfall nor the variation in temperature during the period appear to affect its length.”
t0“wheat”
Claim · model-written summary
Squarehead’s Master emerged later than Yeoman.
- Taxon
- wheatTriticum aestivumt0
- Material
- Squarehead’s Mastere0
- Outcome
- appears above grounde0
- Direction
- latere0
- Comparator
- Yeomane0
Organisms pictured · Representative pictures of the matched species, not figures from the paper.
Verbatim
e0“Squarehead’s Master appears above ground consistently later than Yeoman, but the amount of this lag is apparently uninfluenced by variations in soil temperature.”
t0“wheat”
Claim · model-written summary
The emergence lag of Squarehead’s Master relative to Yeoman was apparently unaffected by soil temperature variation.
- Taxon
- wheatTriticum aestivumt0
- Material
- Squarehead’s Mastere0
- Treatment
- variations in soil temperaturee0
- Outcome
- lage0
- Direction
- uninfluencede0
- Comparator
- Yeomane0
Organisms pictured · Representative pictures of the matched species, not figures from the paper.
Verbatim
e0“Squarehead’s Master appears above ground consistently later than Yeoman, but the amount of this lag is apparently uninfluenced by variations in soil temperature.”
t0“wheat”