This article focus to describe Microbial Cultivation. To the cultivation of bacteria, a common medium isnutrient broth, the liquid containing proteins, salts, and growth enhancers that may support many bacteria. For you to solidify the medium, an agent such as agar is added. Agar is a polysaccharide that will adds no nutrients to some medium, but merely solidifies the item. The medium that final results is nutrient agar.