CBSE Science Class 7

Soil

Soil - Chapter Wise CBSE Solved Question and Answer Based On NCERT

Points To Remember:

  • Soil is one of the most important natural resources
  • Soil is the home for many organisms and it is essential for agriculture
  • The rotting dead matter in soil is called humus
  • Soil is formed by the process of weathering
  • The mixture of rock particles and humus is called the soil
  • Soil is of different types clayey, loamy and sandy
  • The phenomenon of absorption of water by soil is termed as percolation. The percolation rate of water is different in different types of soil, it is highest in sandy soil and least in the clayey soil
  • If the soil is made of a greater proportion of big particles, it is called sandy soil.
  • Clayey soils are heavy and hold more water.
  • Loamy soilis a mixture of sand, soil and silt
  • Cereals like wheat and gram are grown in clay and loamy soils, because these soils have better water retention capacity
  • Clay soils are rich in humus and fertile. These soils are very good for wheat.



Chapter 9 Soil