Just wondered if perhaps you should concentrate more on just growing a diverse cover crop (brassica / radish, legume/s (preferably one that is already growing locally so that you know the appropriate fungi is already present), nasturtium, mix of grains, etc) for the first year or three, just in order to improve the texture of the soil and build up your level of biomass? As you get more "armor" on the soil, then proceed down the path of more broadscale sowing of your climate appropriate crops. Watching some videos on no-dig cover crop rotation farming and this seems like it may be a better path when trying to rehabilitate previously damaged or neglected farmland. Anyway just a couple of ideas. Cheers.