Soil sampling have been taken for the purpose to isolate bacteria that producing exopolysaccharide (EPS)
on rhizosphere potato plants at a depth of 0-20 cm with three gradients of the slope P1 (15%), P2 (25%) and P3 (35
%.). The type of soil samples is Ultisol. At each site soil samples taken in moderation, homogenized and put into a
sterile plastic bag. Equipment have been cleaned and sterile with a wash and then rinsed or wiped with alcohol
swabs.