As we approached Lower Gart I couls see that many of the roofs had coffee drying. Indeed, this is the middle of the Yemeni Harvest (October-December) so it makes sense.

As we got closer I could see the coffee drying on the roofs of the village below. They do not have space for "drying patios" like Central America, so the roofs are a convenient place, as well as another limitation on volume.