In a bowl, combine biscuitbakingmix, 1 1/2 cup sugar, and wheat germ; stir in the tangerine mixture and mix until just moistened. Fill greased muffin tins two-thirds full.
Combine 1/2 cup sugar, flour and cinnamon in a small bowl. Cut in butter until crumbly. Add chopped nuts; mix well. Sprinkle over the muffins. Bake at 400 F. oven for 15 minutes, or until light brown.Cool on wire racks.