Figure 4. Example of adequate irrigation management using soil moisture sensors for monitoring the volumetric soil moisture content of the upper soil layer (0- to 6-inch depth), on drip irrigation under plastic mulched condition for sandy soils. Black line indicates volumetric soil water content using soil moisture sensors. Grey line indicates irrigation event, single daily irrigation event with volume application of 943 gal/ac (0.03 in.). Dotted line indicates soil field capacity line. Arrows indicate rainfall events.