Foliar applications serve two main purposes: (1) an effective method of supplying
deficient micronutrients to a plant, and (2) an effective method of reducing plant stress by
supplying nutrients (NPK included) when soil uptake is limited. Foliar feeding does not
replace soil fertilization or soil fertility. Actually foliar feeding nutrients and other plant
compounds can increase the growth and vigor of a plant, therefore requiring more soil
nutrient support, especially nitrogen and potassium.
There is also the availability of foliar additives such as NUE Stimulate that help a plant
support natural root microorganisms such as mycorrhizal fungi. These important organisms
will be able to further improve the plants ability to take up nutrients from the soil.
Conclusion: The better the base fertility of soils, the better the foliar programs will
respond. Poor soil fertility will always yield poor crops, no matter how good the foliars.