WAC 16-200-711
Plant nutrients in addition to nitrogen,
phosphorus and potassium. (1) Plant nutrients, other than
nitrogen, phosphorus and potassium, when mentioned in any form
or manner shall be registered and shall be guaranteed on the
label. Guarantees shall be made on the elemental basis. Sources of the elements guaranteed shall be shown on the
label. Proof of availability shall be provided the director
upon request. Except guarantees for those water soluble
nutrients labeled solely for hydroponic or continuous liquid
feed programs, the minimum percentages which will be accepted
for registration are as follows:
| Element |
% |
| 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 |
(2) Guarantees or claims for the plant nutrients listed
in subsection (1) of this section are the only ones which
shall be accepted by the department. Proposed labels and
directions for the use of the fertilizer shall be furnished to
the department with the application for registration upon
request. Any of the above listed elements which are
guaranteed shall appear in the order listed immediately
following guarantees for the primary nutrients of nitrogen,
phosphorus and potassium.
(3) A warning or caution statement may be required on the
label for any commercial fertilizer containing more than 0.1%
boron or more than 0.001% molybdenum. The following are
examples of possible warning or caution statements:
(a) Boron:
(i) This fertilizer contains boron which may be injurious
to certain crops. Contact your local county agent or field
consultant for specific information.
(ii) WARNING: This fertilizer carries added borax and is
intended for use only on alfalfa. Its use on any other crops
or under conditions other than those recommended may result in
serious injury to the crops.
(b) Molybdenum: CAUTION: This fertilizer is to be used
only on crops which respond to molybdenum. Crops high in
molybdenum are toxic to grazing animals (ruminants).
[Statutory Authority: Chapter 15.54 RCW. 87-19-097 (Order
1952), § 16-200-711, filed 9/17/87.]