NAC587.530. Content guarantees: Proteins and minerals.

     1. The guarantees for crude protein, equivalent protein from nonprotein nitrogen, crude fat, crude fiber and mineral guarantees, when required, must be in terms of percentage by weight.

     2. Commercial feeds containing 6 1/2 percent or more mineral elements must include in the guaranteed analysis the minimum and maximum percentages of calcium, the minimum percentage of phosphorus, and if salt is added, the minimum and maximum percentage of salt. Minerals, except salt, must be guaranteed in terms of percentage of the element. When calcium or salt guarantees are given in the guaranteed analysis, they must be stated and conform to the following:

     (a) When the minimum is 5 percent or less, the maximum must not exceed the minimum by more than 1 percent of the whole.

     (b) When the minimum is above 5 percent, the maximum must not exceed the minimum by more than 20 percent and in no case must the maximum exceed the minimum by more than 5 percent of the whole.

     3. Mineral phosphatic material for feeding purposes must be labeled with the guarantee for minimum and maximum percentage of calcium, when present, the minimum percentage of phosphorus and the maximum percentage of fluorine.

     [Dep’t of Agriculture Reg., 87.73, eff. 10-1-74]