Soil Erosion
Soil Erosion
Soil Erosion:
The removal of the top layer of the soil by wind and rainfall is called soil erosion. Air and water are the main agents of such erosion.
1. Air: Small particles of soil are easily blown away by strong winds. Bigger particles of soil stay on the ground. Due to continuous friction with other pieces, they are eventually transformed into smaller pieces and finally fly away with the wind. This process is called salutation.
2. Water: Strong currents of water cause more soil erosion than wind. This occurs in two forms. In the first, a stream of water carries with it the upper soft layer of the soil. As a result, runnels are formed on the soil. This is called gully erosion. This type of erosion makes the land unfit for cultivation. In the second form, sheets of soil formed on the surface of the land are washed away during rainfall, thereby reducing the fertility of the soil. Such erosion is called sheet erosion.
Causes of Soil Erosion
1. Uncontrolled grazing of grass by animals: In our country, pastoral land is insufficient for the high population of farm animals. This leads to excessive grazing. The soil becomes unprotected and is washed away by wind and water.
Which of the following are correct : (a) The roots of plants and trees firmly bind the particles of soil together. (b) In some soils the water-holding capacity is high, whereas in others it is low. (c) Soil with low water-holding capacity is swept away by air or water easily. | |||
| Right Option : D | |||
| View Explanation | |||
Identify the correct statement:
| |||
| Right Option : A | |||
| View Explanation | |||
Which of the following are correct : (a) High wind velocity over lands, which have no vegetation, carries away the loose top soil. (b) The removal of trees on a large scale is known as deforestation. (c) The removal of the top layer of the soil by wind and rainfall is called soil erosion. | |||
| Right Option : D | |||
| View Explanation | |||
Students / Parents Reviews [10]
About Abhyas metholodology the teachers are very nice and hardworking toward students.The Centre Head Mrs Anu Sethi is also a brilliant teacher.Abhyas has taught me how to overcome problems and has always taken my doubts and suppoeted me.
Shreya Shrivastava
8thMy experience with Abhyas is very good. I have learnt many things here like vedic maths and reasoning also. Teachers here first take our doubts and then there are assignments to verify our weak points.
Shivam Rana
7thI have spent a wonderful time in Abhyas academy. It has made my reasoning more apt, English more stronger and Maths an interesting subject for me. It has given me a habbit of self studying
Yatharthi Sharma
10thAbhyas is a complete education Institute. Here extreme care is taken by teacher with the help of regular exam. Extra classes also conducted by the institute, if the student is weak.
Om Umang
10thBeing a parent, I saw my daughter improvement in her studies by seeing a good result in all day to day compititive exam TMO, NSO, IEO etc and as well as studies. I have got a fruitful result from my daughter.
Prisha Gupta
8thOne of the best institutes to develope a child interest in studies.Provides SST and English knowledge also unlike other institutes. Teachers are co operative and friendly online tests andPPT develope practical knowledge also.
Aman Kumar Shrivastava
10thMy experience was very good with Abhyas academy. I am studying here from 6th class and I am satisfied by its results in my life. I improved a lot here ahead of school syllabus.
Ayan Ghosh
8thMy experience with Abhyas academy is very good. I did not think that my every subject coming here will be so strong. The main thing is that the online tests had made me learn here more things.
Hiya Gupta
8thIt has a great methodology. Students here can get analysis to their test quickly.We can learn easily through PPTs and the testing methods are good. We know that where we have to practice
Barkha Arora
10thIt was a good experience with Abhyas Academy. I even faced problems in starting but slowly and steadily overcomed. Especially reasoning classes helped me a lot.
