The skills of seed saving are vital for small organic food producers and the whole of agriculture. Farmers and gardeners need to be able to produce their seeds as a basic, inalienable way to control their means of production.
Part of the NOFA guides. Includes information on:

Strengths and limitations of hybrid varieties

Before you grow the seed (selecting varieties, saving seed and improving crops, intellectual property rights)

Growing seed (pollination biology, harvesting, cleaning, storage, germination testing)

Details on individual crops (amaranth, crucifers, beets and chard, lettuce, cucurbits, corn and small grains, nightshades, root veggies)

Plus detailed appendices including more info on seed cleaning, seed companies, and more.