Accepted micronutrient minimum concentrations.

7-15-02-01. Accepted micronutrient minimum concentrations. Micronutrients mentioned in any form or manner must be registered and guaranteed. Guarantees must be made on the elemental basis; however, the source of the micronutrient must be specified. For example, a micronutrient that is a mixture of EDTA and citric acid bound micronutrient must specify the percentage of total micronutrient in each form. Except guarantees for those water soluble nutrients labeled for ready-to-use foliar fertilizers, read-to-use specialty liquid fertilizers, hydroponic or continuous liquid feed programs and guarantees for potting, garden, and lawn soils, the minimum percentages which are accepted for registration are as follows: Element Minimum Conce., % Calcium (Ca) 1.0000 Magnesium (Mg) 0.5000 Sulfur (S) 1.0000 Boron (B) 0.0200 Chlorine (Cl) 0.1000 Cobalt (Co) 0.0005 Copper (Cu) 0.0500 Iron (Fe) 0.1000 Manganese (Mn) 0.0500 Molybdenum (Mo) 0.0005 Nickel (Ni) 0.0010 Sodium (Na) 0.1000 Zinc (Zn) 0.0500 History: Effective October 1, 2014; amended effective April 1, 2026. General Authority: NDCC 4.1-40-11 Law Implemented: NDCC 4.1-40