Micro-nutrients

Content (mg/kg)

Low

Medium

High

Iron

<3.0

3.0 - 5.0

>5.0

Copper

<0.3

0.3 - 0.5

>0.5

Zinc

<0.9

0.9 - 1.5

>1.5

Manganese

<0.6

0.6 - 1.0

>1.0