Broblem 8.4. A farmer is trying to decide which type of orchard tree to plant, c

Question

Broblem 8.4. A farmer is trying to decide which type of orchard tree to plant, crop A or B. She wants to plant the one that uses less water where the amount of irrigation applied to a crop is typically equal to the estimated evapotranspiration from the crop. At 10 meters above the surface, the typical wind speed, air temperature, and relative humidity are determined to be: 6 m s", 22°C, and 37% respectively. The representative available energy over the growing period is 487 W m2, the density of air is 1.18 kg m-3, and the representative surface air pressure is 990 mb. It can be safely assumed that the ground heat flux is negligible. Type A grows to about 3.0 meters tall and has an average canopy resistance of 120 s m Type B grows to about 2.5 meters tall and has an average canopy resistance of 76 s m1. Which orchard tree should the farmer plant to minimize irrigation demand? Justify your answer

Explanation / Answer

type B because height of type a tree is longe compare to the typr b and wind are less effectc compare to the type a tree.

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