Which one of the following is a producer of lignite?

Which type of soil is found in Coimbatore?

How many years does it take to make one centimeter or soil?

Which among the following is not a bio fuel plant?

Which among the following are examples of biotic resources?

What determines the thickness of soil profile?

Which is the first atomic power station of Tamil Nadu?

What affect the rate of humus formation?

Which is the biggest source of non-conventional energy?

Which resources are reproduces without getting depleted?