RT Journal Article SR Electronic T1 Fertilizing Trees and Shrubs in The Landscape JF Arboriculture & Urban Forestry (AUF) JO JOA FD International Society of Arboriculture SP 157 OP 161 DO 10.48044/jauf.1978.037 VO 4 IS 7 A1 Elton M. Smith YR 1978 UL http://auf.isa-arbor.com/content/4/7/157.abstract