Micro-organisms is very important to agriculture, micro-organisms break down plant, so that the soil more fertile.

The use of microbiology in Industry and Agriculture is known as biotechnology or industrial microbiology. It has a various applications in both these sectors. In the Industrial sector, especially in chemical manufacturing, microbiology is used to make ethanol, acetone, perfumes and enzymes. Furthermore microbiology is used to produce pharmaceuticals such as antibiotics, vaccines and steroids.