ISU Agronomy Department Extension
 
Tools
Calculate Animal Units
If the sum of Col. 3 exceeds 500 a.u. you need to be certified to apply manure and you must file a manure management plan. (tool adapted from DNR 542-4000).
Animal Species no.Head x Factor = AUC
Slaughter or feeder cattle :

1.0 =

Immature dairy cattle :

1.0 =

Mature dairy cattle :

1.40 =

Swine over 55 lbs :

0.4 =

Swine 15 lbs to 55 lbs :

0.1 =

Sheep and lambs :

0.1 =

Horses :

2.0 =

Turkeys 7 lbs. or more :

0.018 =

Turkeys less than 7 lbs. :

0.0085 =

Broiler or layer chickens 3 lbs. or more :

0.01 =

Broiler or layer chickens less than 3 lbs. :

0.0025 =

Total AU's =