ABSTRACT The research was conducted from Novumber until Decem ber 1988, in Ngadipuro Village, Dukun District and Magelang Degunay. The objective of this research was to study the influence of trissentanal concentration and plant spacing on yield of radish (Japhanus matiyag.) A split plot droign that waa arranged in randomized complete block design was uned in the field. The main…