Recommended levels

Substance

Lowest

Maximum

Macro Nutrients g/kg (dry matter)

calcium

125

magnesium

15

potassium

30

phosphorus

7

Tracers, mg/kg (dry matter)

Boron

800

Copper

400

Zinc

500

7000

Arsenic

30

Lead

300

Cadmium

30

Chromium

200

Mercury

3

Nickel

70

Vanadium

70