Table 4. Status and Concentration of Cu, Zn, Mn and Fe in  Bovine Liver

                (ppm on a DM Basis)a

Status

Copper

Zinc

Manganese

Iron

Deficient

<25

<40

<3.5

<30

Marginal

30-90

50-90

5-10

40-60

Adequate

100-200

100-300

9-21

75-300

High

300-550

400-800

14-80

400-700

 aAdapted from numerous sources