I could not agree more with your posting. There are areas for growth in Ontario, but the wholesale cannibalism of Ontario Farmland (Region of Waterloo being the latest) calls for change. Change in planning, changes in economic growth policy, changes in the political makeup of some leadership.
When speaking of Ag in N.Ont, one difference off the top of my head will be the number of 'growing degree days'. A critical measure and one that farming in Northern Ontario does not favour, well hello climate change. Having said that there is much usable land in other areas of the Province that has been previously largely abandoned as well. One easy example of this is along the 401, in the general area of Cornwall, where large acreages are being 'reclaimed', they are being stripped of tree's or immature transitional growth to wooded areas, in favour of very large single field acreages, tiled, and suitable for the larger versions of farm equipment. Mostly for corn I believe. These are acreage systems that begin to mimic the very large factory farming operations that can be found in parts of south west Ontario, then west of Ontario in the Prairie provinces, then and south through Ohio, Illinois, Missouri, Kansas, Iowa etc
We often decry the loss of the 'family farm' and the growth of factory farming, I would say that there are a lot of mouths to feed, and as much as I love the mid-size operation, if I had the capital, then bigger (in this case) is more often than not, better.
As for a report on the possibilities of farming in Northern Ontario this report from Guelph in 2017, may shed some light on the subject - both potentials and challenges.
I almost hate to mention it, because when it come to rail we venture into dreamland far to often, but it would be nice to see the occasional grain train moving south in ONR colours, and some potash moving north. That would be a good sign of progress in this area.