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A diagram of soil profile provides a visual representation of the various layers of soil , providing information about their composition and characteristics. The diagram of soil class 7 explains the layers - topsoil, subsoil, and bedrock. Soil is one of the most important natural resources on earth. Soil content and quality vary from region to region. What are the different layers of soil . Learn about the soil profile : O, A, E, C, B, and R horizons explained with definition, physical features, and diagrams. Learn about the formation, structure, and function of soil profiles, and how they vary across different regions and ecosystems. Explore the role of soil profiles in plant and animal life, and the human impact and conservation of soil resources.