cardinal temperature

In agriculture, cardinal temperatures define the minimum, optimum, and maximum temperatures at which a plant can grow. These temperatures vary significantly between different plant species. For instance, cool-season crops like wheat have lower cardinal temperatures than hot-season crops such as sorghum.1

Temperature also influences crop development through concepts like degree days, which measure accumulated heat units. This helps in scheduling planting and harvest times. Both air and soil temperatures are critical; unfavorable soil temperatures can hinder germination and growth. Farmers use various techniques, including mulching and insulation, to manage soil temperature and protect crops from extreme heat or cold. Understanding these temperature thresholds is vital for successful crop production.213