Here’s a fine essay by Eliot Coleman, the Maine farmer who has perfected the four season harvest and has been a leader for decades in organic growing:
http://www.grist.org/sustainable-farming/2011-04-20-eliot-coleman-essay-organic

Link to Master Gardener training information:
http://www.cmg.colostate.edu/gardennotes/GNUpdate.shtml#veg

Veggies from all CSU publications:
http://www.cmg.colostate.edu/pubs.shtml#veg

Planttalk Colorado:
http://www.ext.colostate.edu/ptlk/

Organic Gardening 101:
Organic_Gardening_101