[kbenson]

> in places like California where farmers expect to be pushed off their land eventually by rising land prices they are using destructive practices to extract as much as they can before they go defunct.

Assuming the land is going to be used for non-agricultural uses (residential/commercia, covered in some material in some way) and "destructive practices" means over-farming, but not otherwise polluting or causing damage, I'm not sure I see a problem with that (but I may not be thinking of some consequences).

Then again, that's a lot of assumptions...

[kevinskii]

There may be a tiny minority of farms in pristine locations that will eventually get pushed off their land, but I suspect the vast majority are in areas where the land is absolutely undesirable for anything besides farming. If you've ever driven across California's central valley you'll know what I mean.