The Absorption of
Copper and Zinc by Cattle Consuming Diets
Containing the Antagonists Molybdenum, Sulfur, and Iron
Table 2. The percentage of forages meeting mineral needs of cattle for the 352 forage samplesa.
| Antagonist Levels | ||||||
| Trace Element, % | Adequate | Deficient | Marginal | High | Marginal | Very High |
| Copper | 36.0 | 14.2 | 49.7 | - | ||
| Manganese | 76.0 | 4.7 | 19.3 | - | ||
| Zinc | 2.5 | 63.4 | 34.1 | - | ||
| Cobalt | 34.1 | 48.6 | 17.3 | - | ||
| Selenium (n=305) | 19.7 | 44.3 | 19.3 | 16.7 | ||
| Iron | 62.8 | 8.4 | - | - | 17.0 | 11.7 |
| Molybdenum | 42.2 | - | - | - | 48.6 | 9.2 |
a Adapted from Corah and Dargatz (1996)