"The maximum temperatures (Tmax) are not necessarily getting all that much warmer. However, the rise in relative humidity means that nighttime temperatures (Tmin) are increasing. Higher nighttime temperatures are a negative factor for cool-season grasses such as wheat, driving up plant respiration rates, and reducing yield potential."
"For hard red spring wheat, the yield picture is even more positive. Productivity has essentially doubled in the last 30 years, mainly due to better management, improved genetics, and the use of fungicides to combat diseases. For now, that climate signal isn't there."
Long-term weather trends show increasing nighttime temperatures across the Northern Plains and Western Canada, which negatively impact cool-season grasses like wheat by increasing plant respiration and reducing yield potential. While increased atmospheric CO2 benefits C3 crops like wheat, daytime temperatures are not rising significantly due to increased relative humidity. However, genetic improvements, better management practices, and fungicide use have doubled hard red spring wheat productivity over the last 30 years, currently offsetting climate-related challenges. The climate signal remains minimal in northern regions like Winnipeg, where productivity has actually increased. Changing weather patterns are beginning to affect operational work windows for farmers.
#climate-change-impacts-on-wheat #northern-plains-agriculture #nighttime-temperature-trends #crop-genetics-and-yield #weather-patterns-and-farming
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