Abstract
In continuance of a previous statistical study, the correlation between plot yields of wheat grown at experimental stations in central and southern Saskatchewan and Alberta and the amount of precipitation during the autumn, winter and spring months prior to sowing was investigated.There was a significant relation between pre-seasonal precipitation and the yield secured from year to year on both the fallowed and stubble plots of a summerfallow-wheat-wheat rotation, above-average moisture being associated with increased yields. The annual yields of Marquis wheat from more fertile summerfallowed varietal test plots were not, however, significantly correlated with pre-seasonal precipitation, nor was there any consistent relation between this weather factor and the relative yield of certain early, medium-early and late-maturing varieties.The annual average yield of wheat per acre from 1916–34 in three central and in three southern crop districts of Saskatchewan and Alberta showed a significant positive correlation with the available statistics of rainfall between May 1 and July 31. Yields in the southern districts were also positively correlated with pre-seasonal precipitation, whereas those in the central districts were not. The degree of association (R = 0.74, central; and 0.79, southern) was not adequate for the practical forecasting of annual production, but may be improved by refinements dependent on the accumulation of additional observational data.
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Claims 10
Claim · model-written summary
Preseason precipitation significantly related to annual yields on fallowed plots; above-average moisture accompanied greater yield.
- Taxon
- WHEAT
Triticum aestivumt0 - Treatment
- pre-seasonal precipitatione0
- Outcome
- yield secured from year to yeare0
- Direction
- increasede0
- Setting
- fallowede0
Organisms pictured · Representative pictures of the matched species, not figures from the paper.
Verbatim
e0“There was a significant relation between pre-seasonal precipitation and the yield secured from year to year on both the fallowed and stubble plots of a summerfallow-wheat-wheat rotation, above-average moisture being associated with increased yields.”
t0“WHEAT YIELD IN WESTERN CANADA”
Claim · model-written summary
Preseason precipitation significantly related to annual yields on stubble plots; above-average moisture accompanied greater yield.
- Taxon
- WHEATTriticum aestivumt0
- Treatment
- pre-seasonal precipitatione0
- Outcome
- yield secured from year to yeare0
- Direction
- increasede0
- Setting
- stubble plotse0
Organisms pictured · Representative pictures of the matched species, not figures from the paper.
Verbatim
e0“There was a significant relation between pre-seasonal precipitation and the yield secured from year to year on both the fallowed and stubble plots of a summerfallow-wheat-wheat rotation, above-average moisture being associated with increased yields.”
t0“WHEAT YIELD IN WESTERN CANADA”
Claim · model-written summary
Marquis wheat yields in more fertile summerfallowed variety plots were not significantly correlated with preseason precipitation.
- Taxon
- WHEATTriticum aestivumt0
- Material
- Marquis wheate0
- Treatment
- pre-seasonal precipitatione0
- Outcome
- annual yieldse0
- Setting
- more fertile summerfallowed varietal test plotse0
Not reportedDirection
Organisms pictured · Representative pictures of the matched species, not figures from the paper.
Verbatim
e0“The annual yields of Marquis wheat from more fertile summerfallowed varietal test plots were not, however, significantly correlated with pre-seasonal precipitation”
t0“WHEAT YIELD IN WESTERN CANADA”
Claim · model-written summary
Preseason precipitation had no consistent relation to relative yield across maturity groups.
- Taxon
- WHEATTriticum aestivumt0
- Material
- early, medium-early and late-maturing varietiese0
- Treatment
- this weather factore0
- Outcome
- relative yielde0
- Direction
- no_changeinferrede0
Organisms pictured · Representative pictures of the matched species, not figures from the paper.
Verbatim
e0“nor was there any consistent relation between this weather factor and the relative yield of certain early, medium-early and late-maturing varieties”
t0“WHEAT YIELD IN WESTERN CANADA”
Claim · model-written summary
May-to-July rainfall was significantly positively correlated with wheat yield in central crop districts.
- Taxon
- WHEATTriticum aestivumt0
- Treatment
- rainfall between May 1 and July 31e0
- Outcome
- annual average yield of wheat per acree0
- Direction
- positive correlatione0
- Setting
- three centrale0
Organisms pictured · Representative pictures of the matched species, not figures from the paper.
Verbatim
e0“The annual average yield of wheat per acre from 1916–34 in three central and in three southern crop districts of Saskatchewan and Alberta showed a significant positive correlation with the available statistics of rainfall between May 1 and July 31.”
t0“WHEAT YIELD IN WESTERN CANADA”
Claim · model-written summary
May-to-July rainfall was significantly positively correlated with wheat yield in southern crop districts.
- Taxon
- WHEATTriticum aestivumt0
- Treatment
- rainfall between May 1 and July 31e0
- Outcome
- annual average yield of wheat per acree0
- Direction
- positive correlatione0
- Setting
- three southern crop districtse0
Organisms pictured · Representative pictures of the matched species, not figures from the paper.
Verbatim
e0“The annual average yield of wheat per acre from 1916–34 in three central and in three southern crop districts of Saskatchewan and Alberta showed a significant positive correlation with the available statistics of rainfall between May 1 and July 31.”
t0“WHEAT YIELD IN WESTERN CANADA”
Claim · model-written summary
Southern district yields were positively correlated with preseason precipitation.
- Taxon
- WHEATTriticum aestivumt0
- Treatment
- pre-seasonal precipitatione0
- Outcome
- Yieldse0
- Direction
- positively correlatede0
- Setting
- southern districtse0
Organisms pictured · Representative pictures of the matched species, not figures from the paper.
Verbatim
e0“Yields in the southern districts were also positively correlated with pre-seasonal precipitation”
t0“WHEAT YIELD IN WESTERN CANADA”
Claim · model-written summary
Central district yields were not positively correlated with preseason precipitation.
- Taxon
- WHEATTriticum aestivumt0
- Treatment
- pre-seasonal precipitatione1
- Outcome
- thosee0
- Setting
- central districtse0
Not reportedDirection
Organisms pictured · Representative pictures of the matched species, not figures from the paper.
Verbatim
e0“whereas those in the central districts were not”
e1“There was a significant relation between pre-seasonal precipitation and the yield secured from year to year on both the fallowed and stubble plots of a summerfallow-wheat-wheat rotation, above-average moisture being associated with increased yields.”
t0“WHEAT YIELD IN WESTERN CANADA”
Claim · model-written summary
Rainfall-yield correlations were 0.74 in central districts and 0.79 in southern districts.
- Taxon
- WHEATTriticum aestivumt0
- Outcome
- degree of associatione0
- Value
- R = 0.74e0
- Qualifier
- 0.79, southerne0
- Setting
- centrale0
Organisms pictured · Representative pictures of the matched species, not figures from the paper.
Verbatim
e0“The degree of association (R = 0.74, central; and 0.79, southern) was not adequate for the practical forecasting of annual production”
t0“WHEAT YIELD IN WESTERN CANADA”
Claim · model-written summary
The observed precipitation-yield association was inadequate for practical annual production forecasts.
- Taxon
- WHEATTriticum aestivumt0
- Outcome
- practical forecasting of annual productione0
Not reportedComparatorValue
Organisms pictured · Representative pictures of the matched species, not figures from the paper.
Verbatim
e0“was not adequate for the practical forecasting of annual production”
t0“WHEAT YIELD IN WESTERN CANADA”