2.1 Estimating the Volume of Manure Produced

Estimating the volume of manure produced is important to determine if storage facilities are adequate for critical periods.

You will need the following information:

Critical Storage Period:

The critical storage period is the number of continuous days manure and wastewater cannot be land applied or otherwise used. This may occur during winter or during the growing season when applications cannot be made to crops. In Utah, the critical winter storage period may range from 45 to 150 days depending on location (see Table 1 - Approximate days of winter storage required) and your manure handling/treatment system.

Storage requirements for wastewater may be longer than for solids depending on the type of wastewater application system. Contact your local NRCS office for assistance in estimating the number of days of storage needed for your area and situation.

Daily Manure Production Estimate for Each Livestock Type:

Manure production estimates for various livestock types are presented in Table 2 - Livestock type and daily manure volume production.

Use the following Worksheet (Volume of Manure Produced) which estimates the total cubic feet (ft3) of manure produced by livestock during the critical storage period.

Word  Excel

(*Note- Excel spreadsheets are programed to do calculations for you. On some computers you can do calculations directly on your computer. On others you must save Excel files to your computer or disk before using the spreadsheets. )

Directions for Volume of Manure Produced Worksheet :

Section A: Manure Produced

Enter the number of animals for each type/class, the average animal weight, and the length of time manure must be stored on the Worksheet.

Obtain the appropriate manure production estimates from Table 2 - Livestock type and daily manure volume production and calculate the total volume of manure produced by each livestock type/class.

Repeat the procedure for each livestock group and add the results together to determine the total volume produced for the storage period.

Section B: Current Storage Capacity

Calculate the volume of manure storage currently available.

Compare the cubic feet (ft3) of manure produced to the volume of storage available.

Back to Step 2