Soil: An Important Natural Resource for Life

Soil is a crucial resource for all living organisms, providing a medium for plant growth and a habitat for microorganisms. It supports human needs for food, clothing, and shelter. Soil formation is a slow process that began with the weathering of rocks. Over time, organic matter mixed with weathered rock particles, creating fertile soil. Soil is composed of various layers, known as horizons, each with distinct characteristics. The topsoil is rich in humus and minerals, while deeper layers contain more compact materials. Understanding soil's composition and formation helps us appreciate its vital role in sustaining life.

What factors determine the mineral content of soil?

Why is the A horizon important for plant growth?

How does humus contribute to soil fertility?