Question

why continuous plantation
of the same crop in a field should be avoided

Answer 1

As thier seeds mix and they suck the nitrogen and male soil nutrition deficient andleads to water logging as to maintain nitrogen we could not use this

Answer 2

hello there your answer
continous plantation in the same field is avoided because if we use the same field for plantation soil will loose it's all nutrients and will not be fertile and our crop will not give a nice yield
hope it helps you dear...