What drives the irrigation value in the soil moisture chart? For instance I have a zone that shows .36, which during one run is 26 mins. I know for a fact that in 26 mins we drop about .5” of water. My nozzle inches per hour is 1.15, which was derived from .5/26minutes to get the per minute rate x60mins.
I switched the soil back to sandy loam, from clay. Clay was showing .47 for irrigation in soil moisture chart, nozzle inches was at 1.2