Soil Profile: Due to the physical, chemical, and biological activities that take place during soil formation, well-developed layers of soil are formed, one below the other. Generally we see the top surface of the soil, not layers below it. Soil profile can be seen while digging a well or laying the foundation of a building. Soil profile i.e. various layers of soil can also be observed in a deep cut through the soil. Typically, four distinct soil layers can be seen. It can also be seen at the sides of a road, on a hill or at steep river bank.
Typically, four distinct soil layers can be seen. These layers are referred to as horizons. A vertical section of soil from the ground surface to the parent rock that shows the different layers of soil or the horizons is called soil profile.
"A" horizon or topsoil is the uppermost layer of soil. It consists of fine particles. It is rich in humus and therefore dark in colour. It is soft, porous. and can hold water.
Functions of Top -soil or A-horizon
"O" horizon lies just above the topsoil and is rich in organic matter.
"B" horizon or subsoil is rich in minerals that seep down along with water. It also contains compactly packed fine particles of soil.
"C" horizon contains partly weathered pieces of rock. It is usually characterized by cracks and crevices. It is very difficult to dig beyond this layer.
"R horizon" or Bedrock is the lowermost layer and mainly consists of the parent rock. The properties of this rock greatly determine the composition of the soil.
A well developed soil profile is the result of _______________ | |||
Right Option : D | |||
View Explanation |
Which of the following shows the correct arrangement of different layers of the soil ? | |||
Right Option : A | |||
View Explanation |
Top soil is ____________________ in colour. | |||
Right Option : D | |||
View Explanation |
Being 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.
I 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
Abhyas 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.
My 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.
My 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.
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.
A 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.
My 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.
It 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
It 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.