Question Text
Question 3 :
The micro-organisms present in the soil require moisture (water) and nutrients for growth and survival. Choose from the options below the habitat (place) where the soil has plenty of water and nutrients
Question 4 :
Read the following statements with reference to soil: (i)Weathering is a very fast process of soil formation (ii)Percolation of water is faster in sandy soil. (iii)Loamy soil contains only sand and clay (iv)Topsoil contains the maximum amount of humus .Choose the correct statements from the above:
Question 5 :
Availability of water and minerals in the soil for maximum absorption by roots is in the
Question 9 :
Removal of soil by the action of wind and water is known as<br/>
Question 12 :
The study of the vertical section of the layers of the soil is known as
Question 13 :
Which one of the following is the main cause of land degradation in Punjab?<br>
Question 14 :
.......... affect the soil profile and bring changes in soil structure.
Question 18 :
Which of the following layer of the soil contains more humus?
Question 21 :
Which of the following is/are methods of checking soil erosion?<br>$1$. Strip cropping<br>$2$. Contour ploughing<br>$3$. Use of irrigation and fertilisers<br>$4$. Terrace farming.<br>