Un It 10
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The document discusses the components and layers of soil. It describes the different types of soil based on their humus and water content, including fertile soil with lots of humus and water, poor soil with little humus, and arid soil that is dry and infertile. The soil is composed of organic matter from living things and inorganic matter from non-living things. It has three layers - the topsoil containing humus, water and sand; the subsoil containing sand and rocks; and the bedrock made of larger rocks. The document also explains the relationships between soil, vegetation and fauna.
Un It 10
- 1. Soil, vegetation and fauna
- 2. 1.-Parts of the soil 2.-Types of soil 3.-Soil layers The soil
- 3. Organic matter: this is made by the remains of living things. The descomposition of these remains creates humus Inorganic matter: this is made by non living things 1.-Parts of the soil
- 4. 2.-Types of soil There are different types of soil according to the amount of humus an water it has. a) Fertile soil b) Poor soil c) Arid soil
- 5. a) Fertile soil Soils with lots of humus and water are very fertile
- 6. b) Poor soil Soils with little humus are poor and noot good for cultivation .
- 7. c) Arid soil - Arid soils are dry and infertile
- 8. 3.-Soil layers Topsoil: It is made up of water, sand and humus Subsoil: It is made up of sand and rocks Bedrock: It is made up of bigger rocks.
- 9. The soil and living things Soil and vegetation The soil and fauna
- 10. Soil and vegetation - Plants benefit for the soil. The soil provides the water and nutrients plant need to grow - The soil benefits from plants. Plants help make humus
- 11. The soil and fauna - Animals benefit from the soil. Some animals like worms and rabbits live inside the soil - The soil benefits from animals. Animals create humus with their excrement.