NAC588.050. Additional plant nutrients: Claims, registration and guarantees.

     1. Additional plant nutrients, besides the primary nutrients, nitrogen, phosphorus and potassium, when mentioned or claimed on the label or container, must be registered and guaranteed. Guarantees must be made on the elemental basis. Sources of the elements guaranteed must be shown on the application for registration. Except as otherwise provided in subsection 3, when claims for such nutrients are made on the label, container or application for registration, the minimum percentages which will be accepted for registration are as follows:

Element	Percentage
Calcium (Ca)	1.00
Magnesium (Mg)	0.50
Sulfur (S)	1.00
Boron (B)	0.02
Chlorine (Cl)	0.10
Cobalt (Co)	0.0005
Copper (Cu)	0.05
Iron (Fe)	0.10
Manganese (Mn)	0.05
Molybdenum (Mo)	0.0005
Sodium (Na)	0.10
Zinc (Zn)	0.05

     2. Guarantees or claims for the above-listed additional plant nutrients are the only ones which will be accepted. Proposed labels and directions for use of the fertilizer must be furnished with the application for registration. Warning or caution statements are required on the label for any product which contains 0.03 percent or more of boron in a water-soluble form or 0.001 percent or more of molybdenum. Any of the above-listed elements which are guaranteed must appear in the order listed, immediately following guarantees for the primary nutrients, nitrogen, phosphorus and potassium.

     3. The provision set forth in subsection 1, which establishes the minimum percentages of additional plant nutrients which will be accepted for registration of a brand and grade of commercial fertilizer or agricultural mineral, does not apply to a commercial fertilizer or agricultural mineral that is sold, offered for sale or distributed as a ready-to-use or similar product, including, without limitation, a foliar fertilizer, horticultural growing medium or hydroponic fertilizer.

     [Dep’t of Agriculture, No. 88.05, eff. 2-4-63]—(NAC A by R242-03, 11-13-2006)