Which of the following statement is incorrect? 

Gross profit is -

The wings of butterfly and birds are:

What is used to Reclamation of wastelands into agricultural lands?

Maximum profit is obtained at the point, where:

Arrangement of soil particles is referred to as:

Weeds which are monocot in nature belong to the family

Short supply of water to meet the demand for crop duration is called

Farmers can prevent and slow down soil erosion by

Which one of the following is the correct mode of infection in Ergot of bajra (pearlmillet)

Heavy infestation of which of the following causes poor ploughing performance­: