Wisconsin Administrative Code
Department of Agriculture, Trade and Consumer Protection
ATCP 20-54 - Agricultural Resource Management
Chapter ATCP 40 - Fertilizer And Related Products
Subchapter II - Fertilizer
Section ATCP 40.14 - Fertilizer content deficiencies
Current through August 26, 2024
(1) PRIMARY NUTRIENTS. A fertilizer is mislabeled if any of the following apply, based on a sample collected and tested according to s. ATCP 40.16:
Note:For example, if the label states that the fertilizer contains 30% N, but testing shows that the fertilizer contains only 27.5% N, the fertilizer is mislabeled.
(2) SECONDARY AND MICRONUTRIENTS. A fertilizer is mislabeled if, based on a sample collected and tested according to s. ATCP 40.16, the actual amount of any secondary nutrient, micronutrient or enhancing element listed in a guaranteed analysis falls short of the label guarantee by an amount that exceeds the allowable deficiency shown in Table 1.
TABLE 1
|
ELEMENT |
ALLOWABLE DEFICIENCY (SUM EXPRESSED AS % OF LABEL GUARANTEE) |
|
Calcium Magnesium Sulfur |
0.2 + 5% of the label guarantee |
|
Boron |
0.003 + 15% of the label guarantee |
|
Cobalt Molybdenum |
0.0001 + 30% of the label guarantee |
|
Chlorine Copper Iron Manganese Nickel Sodium Zinc |
0.005 + 10% of the label guarantee |
(3) COMBINED NUTRIENT INDEX. Combined nutrient index, for purposes of sub. (1)(c), equals {total nitrogen (N) guarantee} + {available phosphate (P2O5) guarantee} + {soluble potash (K2O) guarantee}.
Note: The multipliers in sub. (3) are based on approximate relative average wholesale prices for primary plant nutrients in Wisconsin. The department will conduct periodic wholesale price surveys and will adjust the multipliers, as the department deems necessary, by rule.
(4) CUSTOM MIXED FERTILIZER. Label guarantees for a custom mixed fertilizer shall be calculated from the custom mix formulation.
