If only one micronutrient is deficient, DO NOT apply a micronutrient complex fertilizer because, as mentioned above, imbalances can cause antagonism. Apply a salt that contains only the deficient micronutrient. Sources, rates, and micronutrient concentrations for a single corrective application of one or more micronutrients applied to the soil. Wash solution off foliage after application. Toxicities are not easily corrected.
Micronutrient management is complex and difficult.
A more complete treatment of this subject would require more space than available here. This description of the problem should pique your curiosity. Sources, rates, and micronutrient concentration for single foliar sprays for correcting micronutrient deficiencies. Disclaimer - This publication may contain pesticide recommendations that are subject to change at any time. These recommendations are provided only as a guide.