Which radioactive element is used in heart

Example of C4 weed is

Gully erosion is an advance stage of ?

When rain falls on any material on ground having subfreezing temperatures and freezes into sheet or coating ice then it is known as:

Growing crops and raising live stock to meet family need is called:

Estimates of National Income in India are annually prepared by:

Seeds which cannot be successfully stored for long periods are known as 

The particle size of "clay" is -

Which of the following chemical is used to break the dormancy of potato seeds?

The properties of Neem pesticides is generally referred to  

Annidation is referred as: