Make a chart on different kinds of soil and soil erosion
Answers
Answer:What is soil?
Rocks are broken by earthquakes and volcanoes. Rain, frost, sun, wind, water and ice all help to break up the rocks. It takes thousands and thousands of years for the rocks to turn into soil. This is called weathering.
When plants die they rot in the soil. Rotting plants change into humus. Humus and plants hold the soil together. Humus makes the soil healthy for new plants. The healthier the soil, the healthier will be the plants that grow in it.
Ploughing prepares the soil for plants.
The soil is the home for millions of animals. These animals make burrows and tunnels under the ground. Burrowing and crawling through the soil, the animals turn it over and mix it up. Air for the animals to breathe gets into the soil. The roots of plants need the air too. Rainwater runs into the soil and waters the plants.
Before a farmer plants crops, the soil is ploughed. Ploughing beaks up the soil and makes spaces for air and water which the plants will need as they grow.
Types of Soil
Soil is made up of finely ground rock particles. There are three main types: clay, silt, and sand. Each kind can be identified by the size of its particles, by its texture and by tests that show:
(a) how long particles stay suspended in water
(b) the ribbon test, which tests whether or not the soil stays in a ball when moist and squeezed tight.
Most soils are a combination of the three types of particles.
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Explanation:
Their are 6 types of soils : 1) Alluvial soil
2) Black soil
3)Red soil
4)Laterite soil
5)Forest soil
Mainly their are 4 types of soil erosion :
1)Gullies or Gully erosion
- The running water cuts through the clayey soils and makes deep channels as Gullies.
-The land becomes unfit for cultivation and is known as bad land.
2) Sheet erosion
- Sometimes water flows as a sheet over large areas down a slope . In such cases the top soil is is washed away.
3)Wind erosion
-Wind blows loose soil off flat or sloping land known as wind erosion.
4)Soil erosion is also caused due to defective methods of farming . Ploughing in a wrong way i.e. up and down the slope from channels for the quick flow of water leading to soil erosion.