Fruit of 39 peach and nectarine cultivars were harvested at commercial maturity from an orchard between June 5 and September 9 in 2010. Total soluble solids (TSS) concentration ranged from 8.90% to 19.97%,titratable acidity (TA) concentration ranged from 0.20% to 1.12%, and TSS/TA ratio ranged from 9.36 to92.80 in the tested pulp samples of 39 cultivars.