Mineral nutrients are non-carbon nutrients or inorganic. These nutrients are present either as cations ( positively charged) or anions (negatively charged). Cations are derivable from metallic elements, including calcium, potassium, magnesium,iron, copper, cobalt, chromium, manganese, molybdenum (molybdate), zinc, sodium and selenium (selenate).

Nonmetal elements give anions: chlorine ( [...]