add an option to delete (and not only hide) a field from a given year. While hiding a field is not a big deal for users, I think that in the long term it might be a big deal for you as it consumes space in disk. So, it is using resources of your system that you could directed towards other things. Disk space translates into system costs. Farm operation is quite flexible in the sense that we can expand, or contract, by the addition or removal of land from our operation (for example, renting or buying more land, or loosing rental contracts, or giving up in not so much productive lands).
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