28 research outputs found

    Temperature trends in the semiarid prairie of southwestern Saskatchewan

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    Non-Peer ReviewedPreviously, we had analyzed long-term weather data (from 1950 to 1997) to study the annual as well as seasonal change in air temperature within an approximately 15000 km2 area in the semiarid prairie near Swift Current, SK (Cutforth et al. 1999; Cutforth 2000). We found that the average annual maximum (Tmx) and minimum (Tmn) air temperatures had increased linearly with year. Seasonally, we found that the average Tmx and Tmn for January through April (JFMA) had also increased linearly from 1950 to 1997, as had the average Tmn for May through August. Average air temperatures for September through December (SOND) did not change with year. Generally, JFMA experienced the largest warming trend between 1950 and 1997, whereas temperatures during SOND did not change with year

    Stubble height and fertilizer N requirements for maximizing canola yield in the semiarid Canadian prairie

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    Non-Peer ReviewedCanola is becoming a viable crop when grown under fallow in the semiarid prairie, but is also grown in longer rotations, most often direct seeded into standing stubble. Taller standing stubble provides the canola seedlings with a more favorable micro-climate promoting more efficient use of water and increased yields compared to canola grown without the protection of standing stubble. When grown under the more limited moisture conditions of extended rotations but in the moisture conserving characteristics of taller standing stubble, we found canola yielded best with fertilizer N rates similar to those of the moister Black soil zone. Canola yields were consistently highest when fertilized with > 100 kg N ha-1
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