ABSTRACT An experiment concerning the effect of concertrati- on and soaking duration of colchicine to the yeild of french betur (Phaseolus vulgaris L.) had been done at Cawangan village, Sawangan district, Magelang city, Cen- taal Java from July 1713 to September 1993, with an alti tule of 452 metres above sea level. The experiment was arreanged in complete randomized design, with 1…