TY - JOUR AU - Labanauskas, C. K. AU - Jones, W. W. AU - Embleton, T. W. TI - Seasonal changes of micronutrient concentrations in Washington Navel orange leaves JF - California Agriculture JO - Calif Agr Y1 - 1960/02/01 VL - 14 IS - 2 SP - 14 EP - 14 PB - University of California Agriculture and Nature Resources SN - 0008-0845 UR - http://www.ucanr.edu/sites/calagjournal/archive/?article=ca.v014n02p14 AB - Leaf analysis as a tool for effective diagnosis and correction of micronutrient deficiencies or excesses in citrus requires determination of the seasonal trends of zinc, copper, boron, manganese, and iron concentrations in the leaves.