The bioaccumulation factor (BF) values of metals uptake by plant(Kenaf) during the four-week experiment are shown in Fig. 3. The lowest BF value (0.11) was observed for Mn in the 1:1 compost/soil treatment while the highest BF value was found for Zn in the 1:3and 1:4 compost/soil treatments. It appears that compost/soil mix-ture has no significant effects on Cu and Zn bio-accumulated by Kenaf plant. The values of BF for Cu and Zn were not different from each other in all the experimental pots. For other metals, BF values increased in the compost/soil mixture treatments 1:1–1:4 indicating high transfer of metals to Kenaf plant with decreasing