We have a guest at our class KMPD Tanaman 85, mr. Bolot Santoso, he is a retirement from Rubber Research Center Sei Putih. He is an expert about rubber tree, he found a new methode about grafting/okulasi at year 1982, wow that’s I was born ☺HË•⌣•HË•⌣•HË•⌣•HË . He can explain detail about tapping. He a good lecturer.
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