Dorsal sides of young leaflets are not purple. Ventral surfaces of young leaflets show central basal chlorosis. Growth may be distorted. Interveinal necrosis often appears at bases of young leaflets. Very young growing tissue shows necrosis . . . . .
Plant tissues are very brittle, especially under conditions of low stress for water.
Growth accompanying recovery from this deficiency is usually twisted, asymmetrical and otherwise distorted . . . . . Plant tissues are soft and often flaccid, even under conditions of low stress for water. Leaflets developing after onset of the deficiency are narrow and cupped downward, but there is not unusually much twisting, either under the deficiency conditions or upon recovery . . . . . Symptoms neither appearing first nor being most severe on youngest leaves. Symptoms about equal over entire plant, or more severe on oldest or recently matured leaves .