Is electromagnetic induction useful for agriculture?

Answer 1

Induction is necessary to electrical parts of a tractor engine. This makes it useful for agriculture! The same can be said of other tools and equipment used by the farmer. So "yes" is a correct answer to this question.

But was that the intent of the question? Perhaps the question is meant to discover whether there's value in direct electromagnetic stimulation of plants.

In that case, too, the answer is "yes."

In 2009, a study was documented in which potato tubers were exposed to alternating elecromagnetic fields (resulting in induction) of varying strengths. That study cites numerous earlier similar studies. The results showed a definite positive correlation between the strength of the applied field and the growth of the tubers when planted, as well as the storage life of the tubers. Reference below.