摘要
Over a long period of time in the past, it has been explained according to the hypothesis put forward by Klebs, that the alternate bearing in the Citrus tree are determined by the carbohydrate nitrogen ratio (C/N) in the tissues during the flower bud initiation phase just as that in other fruit trees. This hypothesis more or less conforms to the horticutural practice, there are, however, some doubtful points in the case. Recently, on the basis that gibberellin is able to inhibit the formation of
