Bacteria use multiple organic and inorganic compounds for their metabolism. As a result, presence, amounts, and quality of dead organic matter are one of the factors contributing to the uneven distribution of bacteria in the soil. Next, bacteria significantly depend on abiotic conditions, including pH, ions concentration, as well as temperature. Different soils and soil layers are distinguished by composition and climate-related features. As a result, these differences also influence the distribution of bacteria in the soil.