Those amounts of Boron and Zinc might be enough for maintenance, but extra will be needed to correct an existing deficiency.
There are a great number of micro-nutrient mixes, as powder or liquid, available in local stores or on the internet. It is usually just fine to use a full mix containing all or most of the micro-nutrients, including Manganese and Iron and Copper, and trace nutrients such as Molybdenum, Nickel, and Cobalt. Follow label suggestions.