Mich. Admin. Code R. 285.634.1 - Fertilizers for agricultural crop production; specialty fertilizers micronutrient content
Rule 1. Plant nutrients in addition to nitrogen, phosphorus, and potassium when mentioned in any form or manner must be guaranteed. Guarantees must be made on the elemental basis. Sources of the elements guaranteed, and proof of availability must be provided to the director upon request. Except guarantees for those water-soluble nutrients labeled for hydroponic or continuous liquid feed programs, and guarantees for potting soils and lawn soils, the minimum percentages that will be accepted for registration or licensing, or both, are as follows:
|
Element |
Percent |
|
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 |
|
Sodium (Na) |
0.1000 |
|
Zinc (Zn) |
0.0500 |
Notes
State regulations are updated quarterly; we currently have two versions available. Below is a comparison between our most recent version and the prior quarterly release. More comparison features will be added as we have more versions to compare.