Abstract
The objectives of this technical report are, firstly, to present two types of coffee cutback methods and their results, secondly, to present the distribution of root systems of non-fruitful trees.The survey subjects were three coffee farms in the northern region of Okinawa Prefecture. The survey methods consisted of interviews, and surveys of the tree's specifications, vitality, fruition status, and the distribution of root systems. The survey results showed that, firstly, in aggressive cutting back, trees are cut about 30 cm from the base, one to three long branches grow from that point,and the mortality rate is 10%, and fruiting begins about three years after the procedure.In addition, in transplants where accidental cutting back was performed, the trees w ere cut at a height of about 17 cm, and the mortality rate was 0%. After transplantation, the vitality were good and it was shown that the trees bor e fruit.The survey results showed that, secondly, coffee grown in poor soil conditions had root systems dist ributed in shallow soil, with the taproot not extending downward.
