climate

It is doubtful that conventional agriculture can or will move fast enough in response to climate deterioration.  Certainly this can be said of other elements of the economy also, and for similar reasons.  Farmers have a great deal invested in the continuation of business as usual.  Expensive lines of machines suited to one kind of farming only will weigh heavily on farmer response.
This being the case, we should perhaps question the wisdom of the continuous buttressing of farming as usual, from government sponsored crop and income insurance to the targeting of government payments and University research into livestock concentration and annual crops.  It is the younger farmers, few that they are, those kept out by these economic and social cushions for established farmers, that are apt to see their way to the kind of change necessary.  A farmer with forty years experience and a machine investment in the millions will go over the cliff before considering any kind of perennial production, taking much and many with him.