Which of the following statement(s) is/are true for tensiometer?
(A) It measures soil water potential.
(B) It is simple in operation and very useful for scheduling irrigation.
(C) It can also be used for measuring soil water flux.
(D) Although limited to <: 1 bar matric potential, this range can be increased by increasing the permeability of its porous cup.
In a field test of a drip irrigation system:
Min = 45 L/h, Max = 65 L/h, Avg = 50 L/h.
Application efficiency = 90%.
Emitter coefficient of variation = 0.07.
One emitter per plant.
Find the drip irrigation efficiency (round off to 2 decimals).
The value of $\dfrac{1+\cot^2 \theta}{1+\tan^2 \theta}$ will be: