Most 'economical' method of building up soil?

[Tracydr]

Originally Posted by Tania

Wow, Tracy, this is so beautiful! How big is your land?

We have 21 acres. About 2 acres is cleared back behind the pond and I'll move my horse back from the neighbor's as soon as I can get it fenced and a shed for shelter built. Waiting on our house in AZ to close before I can do that.
I have a smaller area cleared on the lower property in front of the pond, actually two areas. One is the septic field which they put in to replace a faulty field. It's about 1,000 feet by 150 feet. The other is a little bit smaller, maybe 400x100. I hope to put the main garden and the fruit trees in the smaller area. The septic field will get planted with blueberries and strawberries. I think the blueberries should be okay there as I understand they have fairly shallow roots?
Around the pond there are some spots with more sun than anywhere except the pasture. I may end up planting perennial edibles in those areas. I will be starting artichoke seed today, along with brassicas and herbs.