TY - JOUR AU - Wallihan, E. F. AU - Embleton, T. W. AU - Printy, Wilma TI - Zinc deficiency in the avocado: Application of zinc chelates to soils may solve the zinc problem in trees on land too steep for spray rig operation JF - California Agriculture JO - Calif Agr Y1 - 1958/06/01 VL - 12 IS - 6 SP - 4 EP - 5 PB - University of California Agriculture and Nature Resources SN - 0008-0845 UR - http://www.ucanr.edu/sites/calagjournal/archive/?article=ca.v012n06p4 AB - Zinc deficiency of avocado trees—a problem common in California orchards—has retarding effects on tree growth, fruit production and in some varieties causes the fruit to be more round than is characteristic for the variety, which reduces the market value.