We investigated if the benefits of PRI on physiology, fresh fruit yield, fruit quality and water
use efficiency (WUE) of pot-grown tomato could be modified by different calcium (Ca) levels in the
greenhouse. Three irrigation methods, i.e. conventional irrigation (CI), alternate partial root-zone irrigation
(APRI, alternate watering on both sides of the pot) and fixed partial root-zone irrigation (FPRI, fixed
watering on one side of the pot), and five Ca levels in solution, i.e. 0, 0.3, 0.5, 0.8 and 1.0% of Ca supplied
as calcium chloride, were designed.