Section 14512 Of Article 2. Definitions From California Food And Agricultural Code >> Division 7. >> Chapter 5. >> Article 2.

. "Agricultural mineral" means any substance with nitrogen (N), available phosphoric acid (P2O5), and soluble potash (K2O), singly or in combination, in amounts less than 5 percent which is distributed for farm use, or any substance only containing recognized essential secondary nutrients or micronutrients in amounts equal or greater than minimum amounts specified by the director, by regulation, and distributed in this state as a source of these nutrients for the purpose of promoting plant growth. It shall include gypsum, liming materials, manure, wood fly ash, sewage sludge not qualifying as commercial fertilizer, and captured dilute solutions.