Traditionally (over 90 years) yerba has been harvested and put through a very large oven that tumbles the yerba moving it from one end to the other. The ovens are heated by a large exposed wood fire and a fan on the input side. This flash dries the yerba before it goes into a longer drying process in the second step. Producers may or may not add smoke to the air in this step. If we describe the yerba as "smoked" then we know that smoke was added during the second drying process.