Combine the yeast, whole wheat flour, all purpose flour, baking soda, salt, honey, oil, and buttermilk (heated to room temperature) into pan of a bread machine.
2
If baking in bread machine use medium temperature setting.
3
If baking in an oven, use manual or dough cycle to knead dough. Remove from bread maker, and place in a greased loaf pan. Let rise until doubled in size. Bake in a preheated 350 degree F (175 degree C) oven for 25 minutes, or until bottom of loaf sounds hollow when tapped.