Figure 15. Daily air temperature regimes during 1995 at Starkville, MS. The lowest line represents 3.6 °F below the ambient temperatures; the second line represents the ambient temperatures; the third, fourth, and fifth lines represent 3.6, 9.0, and 12.6 °F warmer than outside air. Plants were harvested as they reached 50% open bolls; therefore, the higher temperature treatments were discontinued earlier than the cooler treatments.