I have a small patch, and I think I just planted using the general book info. You are supposed to plant the crowns 6"-10" deep in a trench, cover with about 2" of soil, wait until they grow up through, and cover some more, slowly filling the trench. Personally, I would wait until the plants are up about 4" before adding another 2" of soil.
Took a few years to establish, but it's worth the wait! Here's a hint for the future: To avoid having to cut the woody end off your harvest before eating, just snap the stalks off by hand. They will break above the woody part.
Good basic article:
http://www.motherearthnews.com/Organic- ... ragus.aspx
I've also read that, after about 2 weeks of harvesting, if you choose 2-3 sturdy stalks from each plant and allow them to continue to grow, they will provide enough "solar energy" for the plant to produce new harvestable spears for about 2 weeks longer than otherwise.