I also purchased the book: "Secret Garden of Survival" which is quite fascinating.
http://www.amazon.com/Secret-Garden-Survival-camouflaged-forest/dp/1481839772/ref=sr_1_1?s=books&ie=UTF8&qid=1438216754&sr=1-1&keywords=secret+garden+of+survival It is the "permaculture/food forest" idea which I love... planting perennial food crops that you don't have to replant every year as the mainstay, then the annuals go around them. Now THAT'S the lazy way to garden!!!
That's one of the reasons I'm looking for a nut producer that I can plant as one of the main ones. I'm wanting to learn more about the hazel nuts for that as they sound like more of a shrub height which would be more manageable.
Someone asked if the chickens could harvest the hazelnuts themselves. I don't know the answer to that. I was thinking that if they drop and then soften over the winter like for sprouting, then maybe they'd eat them .