How does this relate to agriculture?
|Figure C: Flue-Cured Tobacco|
|Image from Bridget Lassiter|
Convection is responsible for many of the naturally occurring processes that we see in nature every day. For example, convection can affect fog layers that are often seen on cool fall mornings, when the air close to the surface is warmer than the atmospheric air higher up. Smoke rising from a fire can also show the conduction currents present as the heated air goes up. Also, old flue-cured tobacco barns worked on the convection principle, where the heated air from the botton rose through the air to dry the tobacco that was hanging. Convection of air is also a factor in chilling warm bodies in winter when frigid air is brought into contact with skin and the heat is convected away, potentially leading to hypothermia and frostbite when wind chills are extreme.