In this webinar, John Kempf reviews micronutrient and trace mineral function and how to address deficiencies of these minerals. He discusses which can be applied to the soil, which should be addressed with foliar applications, and which can be released from the soil mineral matrix with biology, as well as what form of the trace mineral to apply for maximum effectiveness. He also reviews which lab reports you can rely on to give accurate information about the levels of each of these nutrients. Watch this webinar to learn specifics for each micro and trace mineral: • Relative accuracy of soil, tissue, and plant sap reporting for assessment of nutrient levels in the soil and plant. • Whether soil or foliar, liquid, or dry applications are most effective. • The nutrient form for maximum plant uptake. • Management practices that maximize the utilization of soil reserves See the video at https://youtu.be/kg7BEJUbzWg

1. HOW TO ADDRESS MICRONUTRIENT DEFICIENCIES
A Webinar Hosted by AEA Featuring John Kempf
Photo by Markus Spiske on Unsplash

2. Apply the correct redox state.

3. Foliar applications should be
chelated with non-synthetic
chelation agents.

4. ● Soil report: generally accurate
● Tissue report: generally inaccurate
● Sap analysis: most accurate
● Soil amendment application:
○ all forms of boron work well; Solubor is most
soluble.
○ best sprayed onto the soil for most uniform
distribution.
○ .5 lb actual B/10 inches of annual water/acre up
to 3 ppm in soil.
● Foliar application: Need to consider adequate
calcium levels for sensitive crops.
Boron

5. ● Soil report: generally accurate
● Tissue report: generally accurate
● Sap analysis: most accurate
● Soil amendment application:
○ occasionally recommended
○ best form is cobalt sulfate
○ best sprayed onto the soil for most uniform
distribution
● Foliar application: generally preferred
Cobalt

6. ● Soil report: generally accurate
● Tissue report: somewhat inaccurate
● Sap analysis: most accurate
● Soil amendment application:
○ occasionally recommended
○ best form is copper sulfate
○ best sprayed onto the soil for most uniform
distribution
○ consider the suppressive effect of excessive
copper in soil >30 ppm
● Foliar application: generally preferred
Copper

7. ● Soil report: inaccurate
● Tissue report: inaccurate
● Sap analysis: most accurate
● Soil amendment application:
○ almost never recommended
○ only in soils with no iron in the geological
base
● Foliar application is preferred, crops grown in
mineral soils are almost universally deficient,
because of excessive oxidation.
Iron

8. ● Soil report: somewhat accurate
● Tissue report: inaccurate
● Sap analysis: most accurate
● Soil amendment application:
○ almost never recommended
○ only in soils with no manganese in the
geological base
● Foliar application is preferred, crops grown in
mineral soils are almost universally deficient,
because of excessive oxidation.
Manganese

9. ● Soil report: generally accurate
● Tissue report: somewhat accurate
● Sap analysis: most accurate
● Soil amendment application:
○ occasionally recommended
○ best sprayed onto the soil for most uniform
distribution
● Foliar application: generally preferred
Molybdenum

10. ● Soil report: generally accurate
● Tissue report: somewhat accurate
● Sap analysis: most accurate
● Soil amendment application:
○ regularly recommended
○ best form is zinc sulfate
○ best sprayed onto the soil for most uniform
distribution
● Foliar application: very effective
Zinc

11. Consider the lab testing
needed to accurately
document deficiencies.

12. Naturally derived sources
seldom contain high enough
concentrations of
trace minerals to correct soil
deficiencies.

13. Effective at all pH ranges
Work for both soil and foliar
applications
Chelated with organic chelation
for maximum plant uptake
Economical
AEA Rebound™ Micronutrients