Yen Son district in 1986 has planted tea PH1 in 2-QT 23 teams and 17-KP in my Lam tea company (now Lam tea JSC), productivity reached 20 ton/ha. It features is doll to, non long. The current yield is 20.3 tons/ha, reached 25 tons/ha. Quite disease resistant especially for green hoppers, wooden profile rate less. About the tea quality is quite average rating.
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