Michigan Laws 324.8503 – Order and form of guaranteed analysis; minimum percentage of plant nutrients; additional plant nutrients; other beneficial compounds or substances
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Terms Used In Michigan Laws 324.8503
- Director: means the director of the department or his or her designee. See Michigan Laws 324.8501
- Fertilizer: means a substance containing 1 or more recognized plant nutrients, which substance is used for its plant nutrient content and which is designed for use, or claimed to have value, in promoting plant growth. See Michigan Laws 324.8501
- Grade: means the percentage guarantee of total nitrogen (N), available phosphate (P2O5), and soluble potash (K2O), of a fertilizer. See Michigan Laws 324.8501
- Guaranteed analysis: means the minimum percentage of each plant nutrient guaranteed or claimed to be present. See Michigan Laws 324.8501
- Order: means a cease and desist order issued under section 8511. See Michigan Laws 324.8501a
- Use: means the loading, mixing, applying, storing, transporting, or disposing of a fertilizer. See Michigan Laws 324.8501a
(1) The guaranteed analysis shall show the minimum percentage of plant nutrients claimed in the following order and form:
| (a) Total nitrogen (N). | ____% |
| Available phosphate (P2O5). | ____% |
| Soluble potash (K2O). | ____% |
(b) When applied to mixed fertilizers, grade shall be given in whole numbers only. However, specialty fertilizers with a guarantee of less than 1% of total nitrogen, available phosphate, and soluble potash may use fractional units. Fertilizer materials, bone meal, manures, and similar materials may be guaranteed in fractional units.
(c) When applied to custom blends, grade can either be given in whole numbers or in numbers expressed to the nearest 1/10 of a percent in the form of a decimal in the analysis.
(d) For unacidulated mineral phosphatic material and basic slag, bone, tankage, and other organic phosphatic materials, the total phosphate or degree of fineness, or both, may also be guaranteed.
(2) Additional plant nutrients, other than nitrogen, phosphorus, and potassium, claimed to be present in any form or manner shall be guaranteed on the elemental basis, at levels not less than those established by rules. Other beneficial compounds or substances, determinable by laboratory methods, may be guaranteed if approved by the director.