Two field experiments were carried out at Ras Sudr Research Station, DRC, during 1997/1998 and 1998/1999 growing seasons, to study the effect of organic manure rates and gibberellic acid (GA₃) application method on some growth parameters, growth analysis measurements and forage yield of fodder beet. The experiment was arranged in a split plot design with three replicates. Samples were taken after 100 and 212 day from sowing for determining the previous traits. The results can be summarized as follows: 1.             Raising farmyard manure rates from zero up to 50 m³/fed. led to gradual increment of most growth characters .Similar effect was achieved by applying GA₃ (100 ppm) as a foliar application. 2.             Most of growth analysis as well as forage yield characters were responded positively by increasing organic manure levels and spraying the plants by GA₃ (100 ppm). 3.             The interaction between the two main factors under study was significant only at the first season for some traits.