What do agricultural by-products such as manure or compost provide for the soil?

Agricultural by-products like manure and compost play a vital role in soil health primarily by providing organic matter. This organic matter is crucial for several reasons. First, it enhances nutrient cycling within the soil ecosystem, promoting the availability of essential nutrients to plants as these materials decompose. This process not only supports plant growth but also contributes to microbial activity, which is beneficial for overall soil fertility.

Furthermore, the addition of organic matter improves soil structure. It helps to create aggregates, which in turn increases the porosity and aeration of the soil, allowing for better root penetration and water infiltration. This is particularly important for maintaining healthy soil that can resist erosion and support diverse plant life.

While options mentioning water drainage, only chemical nutrients, or structural support may seem relevant, they do not capture the full benefits provided by organic by-products. These materials are far more than just sources of nutrients; they fundamentally enhance the biological and physical properties of the soil, ensuring long-term sustainability in agricultural practices.