Soil
Soil
Soil: The top layer of the earth’s surface, in which plants grow, is called soil. Soil is a natural resource made up of a complex mixture of several components. Rock particles make up a large part of soil. The following are the main constituents of soil.
Properties of soil:
1. Texture: The texture of the soil depends upon the relative amount of particles. Clay has the smallest sized particles. Because of very small size, the clay is felt smooth.
2. Absorption of water : Soil have the property to hold water . Sandy soil has less capacity to hold water than the clayey soil.
3. Moisture: Soil always retain a small amount of water around it in the form of moisture. It helps the plant to survive in the non availability of water.
4. Soil color : Soil are of different colours. They are red, white and black in color. The red color of the soil due to the presence of iron oxide.The black color soil is rich in minerals and humus.
5. Soil pH: Soil can be acid, alkaline or neutral. Some palnts grow in acidic soil such as potatoes and kumara.
6. Percolation of water : The process of water passes down slowly through the soil is called percolation of water. The water percolate differently through different type of soils.
Growing different types of crops in pieces of land season after season is called | |||
| Right Option : C | |||
| View Explanation | |||
The chemical substances which are rich from nutrients and used to maintain soil fertility are called fertilizers. They also produce harmful effects. They remain in the soil and spoil porous structure of the soil which is essential for plant growth. They also kill the soil organisms like earthworms. Earthworms burrows and loosens the soil and make it porous. Which of the following is a chemical fertilizer ? | |||
| Right Option : B | |||
| View Explanation | |||
Biologist observe 5th June as _________________ | |||
| Right Option : B | |||
| View Explanation | |||
Students / Parents Reviews [10]
It 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.
Cheshta
10thMy 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
10thAbhyas Methodology is very good. It is based on according to student and each child manages accordingly to its properly. Methodology has improved the abilities of students to shine them in future.
Manish Kumar
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
10thA marvelous experience with Abhyas. I am glad to share that my ward has achieved more than enough at the Ambala ABHYAS centre. Years have passed on and more and more he has gained. May the centre flourish and develop day by day by the grace of God.
Archit Segal
7thBeing 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
8thAbout 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
8thIt was good as the experience because as we had come here we had been improved in a such envirnment created here.Extra is taught which is beneficial for future.
Eshan Arora
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.
