Adjusting for Feed Dry Matter Level
     
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HOW TO ADJUST AS FED AMOUNT

FOR CHANGES IN DRY MATTER


Karen L. Jacobsen, BS, DVM, MS
Farm Animal Resources & Management (F.A.R.M.), LLC


Example: You want to feed 16 lb of silage dry matter (DM) per cow per day. You discover that the silage is 30% DM.

To calculate how much silage to feed the cows, use the following equation, where X is the unknown amount of silage As Fed.
(You are saying that 16 lb is 30% of X amount.)

16 = .30 X

16/.30 = X

X= 53.33 lb silage/cow/day

Thus, you need to feed 53.33 lb silage cow/day.

The "Rule of Thumb" is:
Divide the desired pounds of dry matter by the percent dry matter expressed as a decimal.