Evaluation of crop coefficients, water productivity, and water balance components for wine grapes irrigated at different deficit levels by a sub-surface drip
Water balance components for variably irrigated wine grape were estimated. Model simulated seasonal ETC varied from 239 to 382 mm for different treatments. The mean value of actual crop coefficient (Kcact) over the two seasons was 0.27. Monthly Ke values ranged from 0.1 to 0.32 with a seasonal mean of 0.18. Productivity for ET (WPETC) varied from 5.7–6.2 kg/m3 across irrigation applications.