Phosphoric acid, nitrogen, and potash requirements.

1. Except as provided in subsection 2 , a person shall not sell, offer for sale, or distribute any of the following: a. Phosphatic fertilizer containing less than eighteen percent available phosphoric acid (P 2 O 5 ). b. Nitrogen fertilizer containing less than fifteen percent total nitrogen (N). c. Potash fertilizer containing less than fifteen percent soluble potash (K 2 O). d. Mixed fertilizer in which the sum of the guaranteed analysis of total nitrogen (N), available phosphoric acid (P 2 O 5 ), and soluble potash (K 2 O) totals less than twenty percent. 2. Subsection 1 does not apply to any of the following: a. A specialty fertilizer. b. A fertilizer designed to be applied and ordinarily applied directly to growing plant foliage to stimulate further growth. [C77, 79, 81, §200.20 ] 2000 Acts, ch 1082, §2 ; 2025 Acts, ch 134, §17 Subsection 2 amended