“[The State of Organic Seed Report] monitors the status of organic seed in the US and provides a roadmap for increasing the diversity, quality, and integrity of organic seed available.”
Deppe, Carol. Breed Your Own Vegetable Varieties: the Gardener’s and Farmer’s Guide to Plant Breeding and Seed Saving. Chelsea Green Publishing. 2000.
Navazio, John. The Organic Seed Grower: a Farmers Guide to Vegetable Seed Production. Chelsea Green Publishing. 2017.
Ashworth, Suzanne. Seed to Seed: Seed Saving and Growing Techniques for Vegetable Gardeners, 2nd Edition. Chelsea Green Publishing. 2002.
Maynard, Donald and George Hochmuth. Knott’s Handbook for Vegetable Growers. Fifth Edition. Free pdf available. 2012.
Has a section on producing vegetable seed, including predicted yields, germination testing, storage, etc.
OSA’s publication page has a wealth of resources on on-farm breeding, seed production, variety trialing and more.
Seed Saving Guide – Crop by crop chart with isolation distances, population info etc.
Seed Exchange – Find and share seeds you might not find anywhere else. Searchable database.