Isolation of bacteria producing exopolysaccharide (BPE) was performed on several samples of soil were
taken based on the slope is 15%, 25% and 35% in rhizosphere potato (Solanum tuberosum L) respectively. The
depth of which Soil material had been taken was 0-20 cm. A total of one gram of soil material aseptically suspended
in physiological saline solution (0.85%) and serial dilutions were made to 10-6, with Duplo and incubated in
medium ATCC no. 14 (per liter of medium): 0.2 g KH
2
PO
4
; 0.8 g K
2
HPO
4
; 0.2 g MgSO
4
.7H
2
O; 0.1 g CaSO
4
.2H
2
O;