Mineral Riches In The Soil
Chapter Name : Natural Resources |
Sub Topic Code : 103_09_14_04_01 |
Topic Name : Mineral Riches In The Soil |
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Sub Topic Name : Mineral Riches In The Soil |
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Introduction
Soil is formed by the breaking of rocks by various factors and soil contains humus as the top most part of soil which is fertile.
Pre-Requisites:
What is lithosphere and soil erosion?
Real Life Question:
How is soil formed? And how does land becomes barren?
Key Words / FlashCards
| Key Words | Definitions (pref. in our own words) |
|---|---|
| Formation of soil | Soil is formed by breaking down of rocks by various physical, chemical and biological processes. The factors that play a role in formation of soil are sun, water, wind and living organisms. |
| Contents of soil | Consists of small particles of rock, bits of decayed living matter called humus and various forms of microscopic life forms. |
| Type and quality of soil | Type of soil is decided by the average size of particles found in it. Quality of soil is determined by the amount of humus and microscopic organisms found in it. Quality of topsoil determines the biodiversity in that area. |
| Soil pollution | Removal of essential components from the soil and addition of harmful substances is termed as soil pollution. Addition of fertilizers, pesticides destroys the soil structure. Soil pollution kills earthworms and also makes fertile land barren. |
| Soil erosion | Vegetation plays an important role in preventing soil erosion as roots of plant hold the soil tightly. Deforestation leads to soil erosion as topsoil bare of vegetation gets washed away quickly. |
Learning aids / Gadgets
| Gadgets | How it can be used |
|---|---|
| Encyclopedia and internet | Read about the different kinds of soils present in different regions such as red soil, black soil, etc. Try to find breaking of which kind of rocks give rise to that particular soil. |
Real life uses :
Various kinds of soils are present in different areas and the type of crops that grow in this soil also vary as per the soil type.
Places to visit :
Farms, garden, etc.
Practical examples around us
| Examples | Explainations |
|---|
What you learn in Theory:
The formation of soil by breaking of rocks due to various factors. The type and quality of soil and its effects on biodiversity. Soil pollution and soil erosion.
What you learn in Practice:
How soil is formed and what causes soil pollution and soil erosion?