Should sugar be added to the baby's food 

Sugar and other artificial sweeteners should not be added to the child's diet unnecessarily (such as in juices).  It may be added to food preparations like seera, but jaggery is definitely better than sugar, since jaggery is rich in iron.
 

When should salt be introduced

Since the baby's system is not geared to handle too much salt intakesalt in the early months, it is better to keep the baby's salt intake to a minimum.  Most vegetables already contain a sufficient amount of salt (or sodium), therefore additional salt is not required.  As therows, additional salt can be added so that when the child reaches one year of age, he is having regular food prepared for the whole family.
 

Should ghee, butter or oil be added to the child's food

There are mixed opinions on this subject.  Some doctors feel it is better to avoid all fatty additives like ghee, oil and butter until the child is at least 9 months old.  Other doctors  believe these substances are high in calories, calories that are essential for the baby's growth.  Since the child can only eat a limited amount at a time, if ghee or butter has been added to his food, he gets a lot more calories.  Ghee is preferred over butter because butter contains salt.