A technical bulletin from the U.S.D.A. Agricultural Research Service, which exhaustively studies the alfalfa complex, reducing it to 9 facies (possibly subspecies), on the basis of legume characters and flower colors.
A technical bulletin from the U.S.D.A. Agricultural Research Service, which exhaustively studies the alfalfa complex, reducing it to 9 facies (possibly subspecies), on the basis of legume characters and flower colors.