. Crop production risks in the Canadian prairie region in relation to climate and land Grain; Oilseed plants; Crops and climate; Crops and soils; Cultures de plein champ; Cultures et climat. 143 Yield Yields of winter cereals, similar to those of most other crops grown on the prairies, vary tremendously from year to year and from place to place depending on local moisture conditions and soil fertility levels (Figs. 9 and 10). But, in general, if the crop survives the winter, yields of the winter cereals are about 20 to 30% higher than comparable spring-sown varieties. Since winter
. Crop production risks in the Canadian prairie region in relation to climate and land Grain; Oilseed plants; Crops and climate; Crops and soils; Cultures de plein champ; Cultures et climat. 143 Yield Yields of winter cereals, similar to those of most other crops grown on the prairies, vary tremendously from year to year and from place to place depending on local moisture conditions and soil fertility levels (Figs. 9 and 10). But, in general, if the crop survives the winter, yields of the winter cereals are about 20 to 30% higher than comparable spring-sown varieties. Since winter cereals have only a short track record outside Alberta, yield predictions for specific regions or soil types are unreliable. Moreover, because the growth periods of winter and spring wheat are not the same, there is even considerable variation in relative productivity among years and locations. ^^_- / winter wheat D / ^-â- f / spring wheat CD â ( .67 i i i i i 0 56 112 168 224 280 kg N/ha *-» o .e \ 4â ^" T3 a> >» .67 -. ,wet spring, drought in June and July. 56 112 168 224 280 kg N/ha Fig. 9. Effect of available nitrogen on yield of spring and winter wheat in the parkland area of Saskatchewan, where moisture is sufficient. Fig. 10. Effect of available nitro- gen and soil moisture on the yield of winter wheat in the parkland area of Saskatchewan. SUMMARY From the time of the first settlements in Western Canada, farmers have attempted to produce winter cereals. Fall rye has been grown successfully for some time, but poor market potential and resulting low prices have limited production. For winter wheat, the traditional production area has been south- ern Alberta where about 200,000 to 450,000 acres were seeded annually. Else- where, production was sporadic and largely unsuccessful due to the frequency of winter-kill. In recent years, however, with the adoption of the practice. Please note that these images a
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