OAR 603-059-0070
Investigational Allowances, Minimum Detection Limits

(1)

Investigational allowance means an allowance for variations inherent in the taking, preparation and analysis of an official sample. The following investigational allowances provide enforcement consistency in determining deficiencies in products addressed in the administration of ORS 633.311 (Definitions for ORS 633.311 to 633.479) to 633.479 (Fertilizer Research Committee) and 633.994 (Civil penalties for fertilizer law violations). Products will be deemed deficient if the analysis is below the guarantee by an amount exceeding the following values:

(a)

Investigational allowances for primary nutrients are as follows:
% Guarantee — N — P2O5 — K2O
4% or Less — 0.49 — 0.67 — 0.41;
5% — 0.51 — 0.67 — 0.43;
6% — 0.52 — 0.67 — 0.47;
7% — 0.54 — 0.68 — 0.53;
8% — 0.55 — 0.68 — 0.60;
9% — 0.57 — 0.68 — 0.65;
10% — 0.58 — 0.69 — 0.70;
12% — 0.61 — 0.69 — 0.79;
14% — 0.63 — 0.70 — 0.87;
16% — 0.67 — 0.70 — 0.94;
18% — 0.70 — 0.71 — 1.01;
20% — 0.73 — 0.72 — 1.08;
22% — 0.75 — 0.72 — 1.15;
24% — 0.78 — 0.73 — 1.21;
26% — 0.81 — 0.73 — 1.27;
28% — 0.83 — 0.74 — 1.33;
30% — 0.86 — 0.75 — 1.39;
32% — 0.88 — 0.76 — 1.44;
34% — * — 0.79 — 1.46;
36% — * — 0.83 — 1.49;
38% — * — 0.86 — 1.51;
40% — * — 0.90 — 1.54;
42% — * — 0.93 — 1.56;
44% — * — 0.96 — 1.58;
46% — * — 1.00 — 1.46;
48% — * — 1.03 — 1.63;
50% — * — 1.07 — 1.66;
52% — * — 1.10 — 1.68;
54% — * — # — 1.70;
56% — * — # — 1.73;
58% — * — # — 1.75;
60% — * — # — 1.78;
62% — * — # — 1.80.
* For N guarantees above 32%, the investigational allowance shall be 0.88.
# For P2O5 guarantees above 52%, the investigational allowance shall be 1.10.
For K2O guarantees above 62%, the investigational allowance shall be 1.80.
For guarantees not listed, calculate the appropriate value by interpolation.

(b)

Investigational allowances for secondary nutrients and micronutrients are as follows:
Element -- Investigational Allowance
Ca — 0.2 Unit + 5% of Guarantee;
Mg — 0.2 Unit + 5% of Guarantee;
S — 0.2 Unit + 5% of Guarantee;
B — 0.003 Unit + 15% of Guarantee;
Co — 0.0001 Unit + 30% of Guarantee;
Cl — 0.005 Unit + 10% of Guarantee;
Cu — 0.005 Unit + 10% of Guarantee;
Fe — 0.005 Unit + 10% of Guarantee;
Mn — 0.005 Unit + 10% of Guarantee;
Mo — 0.0001 Unit + 30% of Guarantee;
Na — 0.005 Unit + 10% of Guarantee;
Zn — 0.005 Unit + 10% of Guarantee.
“UNIT” is twenty (20) pounds of plant food or one percent (1%) of a ton
The maximum allowance when calculated in accordance to the above shall be 1 unit (1%).

(c)

Investigational allowances for lime products are as follows:

(A)

When the Lime Score is found to be more than 5% deficient from the stated Lime Score.

(B)

When the amount of calcium carbonate, calcium oxide, magnesium carbonate or magnesium oxide content is found to be more than 10% below the guarantee.

(d)

Investigational allowances for ingredients other than primary nutrients, secondary nutrients and micronutrients are as follows:

(A)

When the amount of other ingredients is found to be more than 15% below the guarantee.

(2)

Minimum detection limits for laboratory analysis reports of metal levels required by the department in accordance with ORS 633.362 (Registration of fertilizer, agricultural amendment, agricultural mineral and lime products) must be declared at, or below, the following:
Arsenic — 10.0 ppm;
Cadmium — 05.0 ppm;
Lead — 05.0 ppm;
Mercury — 0.20 ppm;
Nickel — 05.0 ppm.

Source: Rule 603-059-0070 — Investigational Allowances, Minimum Detection Limits, https://secure.­sos.­state.­or.­us/oard/view.­action?ruleNumber=603-059-0070.

Last Updated

Jun. 8, 2021

Rule 603-059-0070’s source at or​.us