Foliar feeding does not pay unless it used to correct an existing nutrient deficiency. Often these deficiencies are best managed by soil applications of fertilizers before planting. Manganese and Boron are examples of nutrients that may be applied to foliage and have been shown to provide some yield benefit in specific situations.
“For more information on this or other topics related to soybean production, contact your state extension specialist or your local extension educator/agent.”
The following is the link to the soybean extension specialists: state extension soybean specialist