28 



1.4 



20 



30 40 50 



Days on trial 



60 



70 



80 



FIGURE 3-1. Mean serum Zn for cattle supplemented with 

 different sources of Zn . SEM (|ig/ml) for d 1 .20, d 3 .18, d 

 14 .25, d 28 .21, d 42 .21, d 56 .36, d 70 .32, d 84 .29. 



2.8 



FIGURE 3-2. Mean erythrocyte Zn for cattle supplemented with 

 different sources of Zn . SEM (|ig/ml) for d 1 .45, d 3 .43, d 

 14 .31, d 28 .33, d 42 .34, d 56 .33, d 70 .40, d 84 .36. 



