text: There are a lot more advantages than disadvantages, of course.\nCrop rotation reduces considerably the risk of extinguishing the naturally grown individuals.\nThese ones are important mostly to preserve technology, creating a small population where certain diseases and plagues can keep living naturally, don't mutate and become resistant to insecticides, herbicides, fungicides, etc.\nLarge crops provide purer fields of the same quality grain/oilseed and at a lot cheaper price so the 6.3 billion people in the world can eat.\nRemember that, crop rotation, crop protection, and selected fertilization make sustainable agriculture.