Table 4. Minimum Mineral Requirements Of Beef Cattle Diets In Percent Or Parts Per Million (ppm)

 Major or Macorminerals

Minor or Microminerals


Mineral

Percent

  Mineral

ppm


Sodium (Na) 0.08   Chromium (Cr) ----
Chlorine (Cl) ----   Cobalt (Co) 0.10
Calcium (Ca) 0.45   Copper (Cu) 8.00
Phosphours (P) 0.35   Fluorine (F) ----
Magnesium (Mg) 0.10   Iodine (I) 0.50
Potassium (K) 0.65   Iron (Fe) 50.00
Sulfur (S) 0.10   Manganese (Mn) 40.00
      Molybdenum (Mo) ----
      Selenium (Se) 0.20
      Silicon (Si) ----
      Zinc (Zn) 30.00

Source: Nutrient Requirements of Beef Cattle, Sixth Revised Edition, National Research Council, 1984.