No soil amending ingredient may be listed or guaranteed on the labels or labeling of any soil amendment without the approval of the secretary of agriculture and natural resources. The secretary may allow any soil amending ingredient to be listed or guaranteed on the label or labeling if satisfactory supportive data is provided the secretary to substantiate the value and usefulness of the soil amending ingredients. The secretary may rely on the agricultural experiment station for assistance in evaluating the data submitted. If any soil amending ingredient is permitted to be listed or guaranteed, it shall be determinable by laboratory methods and shall be subject to inspection and analysis of the soil amending ingredient. The secretary may stipulate by rules established pursuant to chapter 1-26 the quantities of the soil amending ingredients required in soil amendments.
SDCL 38-19A-10