Back at ya 405-)

Although I see your point, and quite apart from the very real political agenda associated with the modern sustainable development movement(too, there was no intent to necessarily tie your motivations to that movement any more than my were formerly), with the temperature increase, decidedly marginal lands become more productive throughout Britian, Finland, Sweden and elsewhere in Europe. When the mini ice age came along, the record shows, many starved, over a number of decades(as I recall).

Although I follow your agricultural methods argument, my point is that the only thing that made any of those lands remotely productive was the increase in temperature and presumably the increased CO2 in the atmosphere. My understanding, quite apart from politics and agenda's, is that those are the factors that gave large portions of marginal lands any viability, at all.

Now perhaps your argument could have improved harvests over the course of time, and it's likely even, their methods did diminish the harvest over time, but, the records show the Norse quite reluctantly departed Greenland. And that, because it was impossible for them to retain a foothold precisely because agriculture was no longer sustainable, in any measure, due to declining annual temperatures and advancing ice formation on land and in the nearby waters.

I hope I did a better job of explaining my thinking.

respects

ps hope all is proceeding uneventfully, apart from the nurturing.