Odor Setback Model

Cow Emission Factors and Weights

The Cow Emission Factors represent the amount of odor generated by a cow. These factors are assigned by in-field research and comparison of average Cow Weights. To calculate the total odor emission from a dairy facility, the emission factor for each cow type is multiplied by the number of head of cows.

The emission factors and weights for different cow types as used here are:

Cow Type
Emission Factor (OU/s-number)
Cow Weights (lbs.)
Calf
8
250
Heifer
14
750
Lactating
25
1400
Dry Cow
19
1400