Land Soil Water...

Which of the following methods are used to restrict soil erosion?
A. Ploughing along contour lines
B. Strip cropping
C. Jhumming
D. Mixed farming.

Which of the following factor is helpful in controlling the soil degradation?

What does the zig-zag line indicate on the map of India?

Which of the following happens to the amount of 'Energy' when it is passed on from one tropic level to another in an ecosystem ?

It is important to make small check dams across the flooded gullies because they-
(i)   hold water for irrigation.
(ii)  hold water and prevent soil erosion.
(iii)  recharge ground water.

Mulching is associated with use of ________________.

Supplying water to agricultural lands through canals, wells and tanks is called ______.

Terracing helps soil conservation in ___________.

Where does approximately 69% freshwater on the earth occur? 

Ploughing along the places of same elevation is known as _____.