The trace mineral content of most feeds and supplements is provided in terms of parts per million (ppm). It is the same as mg/kg (1 mg is a millionth of a kg).
To do calculations, you need to convert lb or oz to kg using the following conversions:
Example #1: Your hay contains 140 ppm of iron. How much iron is in 20 lbs of hay?
Step 1: 20 lb X 0.454 kg/lb = 9.08 kg
Step 2: 9.08 kg X 140 mg/kg = 1271 mg of iron
Example #2: Your supplement contains 12 ppm of selenium in each ounce and you are feeding 2 ounces per day. How much selenium are you feeding?
Step 1: 2 oz X .0284 kg/oz = 0.057 kg
Step 2: 0.057 kg X 12 mg/kg = 0.68 mg of selenium
Formulas to remember:
TeleSeminar Series on Nutrition Topics that Concern You.
Dr. Juliet Getty lectures and answers your specific questions over the phone. The entire events are recorded to listen from your computer or download to an mp3 player. Audio CDs are also available.
Click Here for details and to purchase.
If you have requested an appointment for a consultation, Dr. Juliet Getty will contact you within 24 hours to arrange for a convenient time. Consultations are fee-based ($190/hr). Click Here for more information on consultations.