What is the advantages of inorganic farming?

This question cannot be answered because the phrase "inorganic farming" is self-contradictory.

inorganic --

• Not arising from natural growth.
• Of, relating to, or denoting compounds that are not organic (broadly, compounds not containing carbon).

farming --

The activity or business of growing crops and raising livestock.

In other Words, if it is inorganic, it can't be farmed because it won't grow.