2.5. Yield components and fruit qua

2.5. Yield components and fruit quality
Five table grapes in each plot were chosen to investigate yield
components and fruit quality; actual yield of each plot were
also recorded at harvesting. Bunches were collected from
upper, middle and lower position of the table grape to obtain
bunch weight and percentage of edible grape. From the
harvested grapes 2 kg berries were chosen randomly for
analyzing berry weight and fruit quality. Total soluble solid
concentration (TSSC) was measured by refractometer (WYT-II
handheld refractometry, Chengdu Refractometer Ltd., China).
Titrated acidity (TA) was determined by titration with NaOH
with phenolphthalein as indicator. Vitamin C content (Vc) was
measured by 2,6-dichlorophenol-indophenol titration (AOAC,
1990). Five samples were measured for each treatment. Yield
water use efficiency was calculated and expressed as WUEET
(total fruit yield per water amount consumed).
2.6. Data analysis
Data were statistically analyzed by a complete randomized
model using SAS 6.12 (SAS Institute Ltd., USA). All the
treatment means were compared in the same row for any
significant differences using the Duncan’s multiple range tests
at a significance level of 0.05.