The removal of fertile top soil from land by wind or water is called soil

The process by which huge rocks are broken down into small particles by the action of sun's heat, wind, rain and flowing water, etc is called 

The manufacture of which of the following materials on a large scale is a cause of soil erosion? 

A. Plastics     B. Paper   C. Polyester       D. Plywood

In order to make fertile soil, the tiny rock particles should be mixed with

Percolation rate of water is highest in 

Which of the following present in soil has the smallest sized rock particles? 

Chemical colours of idols make damage for 

The best soil for growing wheat crop is 

Water holding capacity of soil depends on 

Which of the following cannot prevent soil erosion?