Percolation rate of water is highest in 

Soil if formed form 

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

The best soil for growing paddy is the one which has 

Which of the following cannot prevent soil erosion? 

Which one of the following cannot be an effect of soil erosion? 

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 

One of the following is not a type of soil. This one is 

The water- holding capacity is highest in 

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