Here's a great article about building healthy soil in the Intermountain West. It's different here than in other parts of the country.
Gardening Tips: Healthy Soil | Boulder County Home & Garden Magazine
Colorado Master Gardener Volunteers gardening and blogging in Jefferson County Colorado. We work at the CSU Extension Office at the Jefferson County Fairgrounds. Call 303-271-6620 or e-mail your questions to mastergardener@jeffco.us