My parents homesteaded just outside of Delta Junction when I was small (they had 160 acres, and my dad's parents had another 160 acres next to us, so we had 320 acres altogether as they farmed together). Dad and Grandpa raised potatoes to
sell,
hay and barley for
dairy cows (which were at another friend's place except for when we had a
milk cow at home), and for a while sold milk, mostly to Fort Greeley. There is a lot of good farming soil -- level, free of rocks -- in that area, but it may still need to be cleared, depending on where you buy. There's good
water not too far down, too. Do some research on the growing season, though. And keep in mind that there are high winds in that area, as well. Also, in the summer, Alaska is prone to having a lot of wildfires, so keep a good firebreak around your home. Another thing to consider is market if you plan to grow stuff to sell. The
local population isn't all that large, so you'd probably need to market stuff in Fairbanks or Anchorage. Oh, and there are two herds of free-roaming bison in the area, one on each side of the Delta River. If you can get a permit to hunt them (permits were being distributed by lottery last I knew) you can fill a couple of big freezers with meat. However, they are a huge nuisance to area farmers, breaking down fences, trampling and eating crops, and breaking into hay sheds and devouring hay meant for the farmers' livestock. They are also a hazard on the road (seems like every year someone gets killed by hitting a bison), and they can be dangerous to humans.
It's been a long time since I've lived there, so I probably can't give you much more information, but do contact the Agricultural Extension office in Fairbanks and talk to the people there -- they've done huge amounts of research for decades on what will and will not grow in that area, and on the best types and breeds of livestock and crops.
Kathleen