In a large bowl, dissolve yeast in warm water. Add the buttermilk, oil and sugar. Combine the flour, baking soda and salt; add to yeast mixture and beat until smooth. Do not knead. Let stand for 10 minutes.
Turn dough onto a lightly floured surface; punch down. Shape into 24 balls and place in two greased 9-in. square baking pans. Cover and let rise in a warm place until doubled, about 30 minutes.
Bake at 400° for 20 minutes or until golden brown. Remove from pans to wire racks to cool.