Maize (corn) was planted on May 1st 1994 in a field located at an elevation of 200 m in Wisconsin. What is the actual evapotranspiration (mm/day) for the maize crop on July 15, 1994? Using Penman's method, estimate the ET0 for July 15, 1994. The average temperature for July 15 was 16C, with a maximum T of 22C and a minimum of 10C. The previous day's average temperature was 14C, and the following day's average temperature was 21C. The early morning actual vapor pressure on July 15 was 1.3 kPa; the wind speed was 2 m/s and Rn was 15 MJ/m2/d.

a) Calculate the atmospheric pressure (kPa).

b) Calculate the latent heat of vaporization (MJ/kg).

c) Calculate the Heat flux density to the ground (MJ/m2/d)

d) Calculate the Psychrometric constant (kPa/C).

e) Calculate the slope of the saturation vapor pressure-temperature curve (kPa/C).

f) Calculate the vapor pressure deficit (kPa).

g) Calculate the reference ET (mm/day)

h) What is the value of the crop coefficient (kc) of the maize crop?

i) What is the actual evapotranspiration for the maize crop on July 15, 1994? (mm/day).