The subject of forage quality and its relationship to cow health and milk yield is a fascinating, yet highly complex subject. In the Midwest, Northeast, and West, dairy forages are primarily alfalfa and corn silage; Other crops, such as pea and oat mixtures, also play a role. Grass forages, including the various sorghums, play a larger role in more southern areas where it is difficult to grow alfalfa. What are the factors involved in producing high quality forage? One factor that should not be overlooked is fertilizer and soil fertility.