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Define ploughing.
 
a. The process of   and turning the soil to facilitate  to the root is called ploughing.
 
b.  is made of wood, drawn through a pair of bulls or horses. It has a strong, sharp triangular iron strip called the ploughshare. It has a long log of wood (main part) called the plough shaft. The other end is attached to a beam placed on the neck of the bull or the horse.
 
c.  is a simple agricultural tool used to till the land, remove the weeds, and dig the soil. It contains a long wooden rod that contains a bent iron plate at one end. The other end can be attached to an animal.
 
d.  involves the use of a tractor. It kill weeds and remove unwanted vegetation present in the field.