Nutrient

Chemical symbol

Sufficiency levels

Form of uptake

Nitrogen

N

28 - 3.5%

NH₄⁺ Ammomium
NO₃ Nitrate

Phosphorus

P

0.1 - 0.4%

H₂PO₄^-, H₂PO₄^2-

Potassium

K

1.0 - 2.5%

K⁺

Sulphur

S

0.2 - 0.4%

SO₄

Calcium

Ca

0.5 - 1.2%

Ca²⁺

Magnesium

Mg

0.2 - 0.6%

Mg²⁺

Iron

Fe

35-100 mg/kg

Fe²⁺ Fe³⁺

Manganese

Mn

25-150 mg/kg

Mn²⁺

Copper

Cu

5 - 20 mg/kg

Cu²⁺

Zinc

Zn

22 - 30 mg/kg

Zn²⁺, Zn(OH)₂⁰

Boron

B

10 - 60 mg/kg

B(OH)₃⁰

Molybedenum

Mo

Unknown

MoO₄^2-

Chlorine

Cl

Unknown

Cl^-