Installing a tensiometer at a depth of 0.2 m is an efficient method for scheduling of drip irrigation (Kang, 2004). Jiao et al. (2007)
experimented on saline soils in Ningxia Province by presetting the threshold SMP of −5, −10, −15, −20 and −25 kPa to control the timing of the irrigation cycle using vacuum tensiometers buried 0.2 m deep immediately under drip emitters. They found that the highest plant production was for SMP of −5 kPa. Based on this research, the authors’ research group used this method for grassland restoration, with irrigation applied when the SMP reached the target values.