Re: Fusarium/panama disease
That's why we all need to collect and plant whatever useful things we can. I am currently starting my soil building process on freshly ripped rock. It may be some years before we get anywhere.... But it will be well worth it.
Good thing bananas will grow just about anywhere.
I would try spraying your yard with IMO s or a home made compost tea to boost beneficial fungus and microbes. I realized I may have brought in nematodes to my new plot, so I may have to do this as well up there.