Natural Resources Extension Program
Step 2. Amount of Manure Produced
This worksheet estimates the weight of solid manure produced per year.
Example Information * :
- 3000 head at an average weight of 750 lbs
- Critical storage period = 150 days per year.
- 750 lb beef cattle = 45 lbs wet manure produced per day at 88.4 % moisture or 11.6% dry matter
| 1. |
45 lbs x 11.6% = 5.22 lbs dry matter |
| 2. | 5.22 lbs x 150 days = 783 lbs dry manure/head/year |
| 3. |
783 lbs x 3000 head = 2,349,000 lbs/year |
| 4. | 2,349,00 lbs/yr ÷ 2000 lb/ton = 1174.5 Ton dry manure/year |
* NOTE: These example calculations are assuming this operation is feeding the animals for 150 days. The animals enter the lot at an average weight of 600 pounds and after 150 days leave at an average weight of 900 pounds. Therefore for purposes of this example an average weight of 750 pounds is used so people can follow on the referenced tables.