A boy goes from home to school at a speed of 30 km/h and

What is the term for the angle at which the plane of the cutting edge of a disc in a disc plough is inclined to the direction of travel?

Country which is pioneer in hybrid rice is

One ha cm of water is equal to:

Virus that infect plants mostly have genetic material in the form of

The distinct aroma of freshly ploughed land is due to _____

In which of the following processes molybdenum has an important role? 

Barbara McClintok is associated with 

Parthenium hysterophorus (Congress grass) can be controlled by:

National Income means