14559. 'Secondary plant nutrient' means calcium, magnesium, or sulfur, alone or in any combination.(Added by Stats. 1990, Ch. 504, Sec. 2.)
California Legal Code
§ 14559
Source: https://leginfo.legislature.ca.gov/faces/codes_displayText.xhtml?lawCode=FAC&division=7.&title=&part=&chapter=5.&article=2.· Version 2026