Soil bacteria are tiny microorganisms found in the soil that play a crucial role in maintaining soil health. They help break down organic matter, such as dead plants and animals, turning it into nutrients that plants can use. This process is essential for nutrient cycling and supports the growth of various plants. In addition to decomposition, soil bacteria also contribute to soil structure and fertility. They can form beneficial relationships with plants, aiding in nutrient absorption and enhancing plant growth. Overall, soil bacteria are vital for sustaining ecosystems and promoting agricultural productivity.