AFSRC scientists are working closely with scientists from Mountain State University to study medicinal herbs in the Appalachian Region. Wormwood (Artemisia annua) is one of the medicinal plants being studied. This picture shows the effects on leaf appearances when nitrogen (N), phosphorus (P), or potassium (K) were withheld from plants grown in a common Appalachian soil.

Ferreira, J. F. S.  2007. Nutrient Deficiency in the production of artemisinin, dihydroartemisinin, and artemisinic acid in Artemisia annua L. Journal of Agricultural and Food Chemistry, 55(5):1686-1694.