Ray,
I won't swear to it, mind, but I'd guess that plot of land in the video is clay or clay loam, based on the fact that most of the soil near the Rockies is either granite decomposed or clay/clay loam, also alkaline and salty. For instance, in my much less salty garden, I'm still advised not to amend with sulphur because the salts will bind it up. (I live near the Rockies, rather north east of the site in the video.)
I know that one of the first
permaculture vids I watched on youtube (not sure how I even got to it) showed putting in swales in Jordan, where the soil is literally turning to dust from mismanagement, then heavily mulching them and putting in on one side (windward? sunward? didn't say) many of the
local forerunner (term? sorry, this is new terminology to me)
trees as a
canopy layer, and on the other side planting fruit trees and some others (mostly fruit from what they showed, but later said they put in more non-fruiting trees than fruiting trees) in descending layers, mimicking the forest
shelter effect, then going down to bushes and shrubs. Within a year they had
mushrooms growing under the mulch (they'd never seen them before, too dry), and in three years they had figs that were producing fruit, supposedly impossible in their high-salt soil (which freaked out the local officials). Tests revealed that apparently the mushrooms had pushed the salt away, desalinizing the area.
There
should be no reason that one or the other of the techniques wouldn't work for you, but maybe you could try it on a small scale to see how it works? Naysayers who haven't tried a method, or have only tried half a method, should be taken lightly, but that doesn't mean their advice is worthless, either. Maybe a good soil analysis would be a good place for you to start, to see what you currently have to work with.