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Lower limit or boundary of dT (for corn) <br />-10.0 <br />-8.0 <br />-6.0 <br />-4.0 <br />-2.0 <br />0.0 <br />2.0 <br />4.0 <br />0.0 1.0 2.0 3.0 4.0 5.0dTmin (˚C)Vapor Pressure Deficit (kPa) <br /> AZ, Maricopa <br /> CO, Greeley <br /> CO, Iliff <br /> CA, Davis <br /> ND, Oaks <br /> India <br />dT = Tc – Ta <br />dTmin : 2.73 – 1.90 × VPD; Developed w/ data from Iliff, CO <br />10 <br />dTmin = (Tc – Ta)min = a + b VPD <br />For Corn: <br /> <br />(Idso, 1982) <br />dTmin = 3.11 – 1.97 VPD, <br /> <br />(Nielsen &Garden (1987) <br />dTmin = 2.67 – 2.06 VPD, <br />