After you sort out little rocks, wash the beans.
Cover the beans with 3" water, about 1 teaspoon salt, let soak over night (and chamge the salted water while soaking if you have time). much of the water will be absorbed.. I add more water to the line in my pressure cooker.. again about 3" and a whole onion, brown, yelow, white, purple, not green.
Here's a link that tells you why ypou should not use baking soda as it destroys the nutritional value of the bean http://www.soupsong.com/fbeans.html
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