How does the Tevatronic system knows and decides how much water to apply?

In the Tevatronic system the user adjust two parameters: threshold tension of

irrigation and irrigation depth. The plant dictates the frequency by the rate of

the drying soil and the mathematical algorithm calculates the required volume

to vet the chosen depth in each cycle of irrigation. It is that simple, no need to

calculate Penman for estimating evapotranspiration and plant coefficients.