Lesson 31: Manure Utilization Plans

Manure Nutrient Availability

Table 31-1: Total manure nutrients produced by livestock and poultry. Nitrogen, P2O5 and K2O production can be calculated by entering livestock or poultry operation information into Columns 2 and 3 for the appropriate animal species and multiplying by the relevant factors.

1. Livestock or Poultry Species 2. Number of animals (average capacity) 3. Average Weight, lbs 4. Total Animal Weight (No. * Avg. Weight) 5. Lbs of N/lbs of animal weight/yr 6. Lbs N/yr (Total weight * N) 7. Lbs of P2O5/lbs of animal weight/yr 8. Lbs of P2O5/yr (Total weight * P2O5) 9. Lbs of K2O/lbs of animal weight/yr 10. Lbs of K2O/lbs of animal weight/yr (Total weight * K2O)
Swine Nursery
Grow
Finish
Sows & Litter
Sows (Gestation)
Gilts
Boars
Beef (450-750 lbs)
Beef Feeder (high-energy diet)
Beef Feeder (high-forage diet)
Beef Cow
Dairy Cow...50 lbs/d
Dairy Cow...70 lbs/d
Dairy Cow...100 lbs/d
Dry Cow
Heifer/Calves
Layer
Pullet
Broiler
Turkey
TOTAL: If more than one manure storage or treatment system is used for different groups of animals, it is best to separate the groupings of animals and their nutrient excretion totals for each manure system. System 1:    
Source: NRCS Agricultural Waste Management Field Handbook, 1992 with exception of lactating and dry dairy cows. Dairy estimates are from Van Horn 1991.

Table 31-3: Nutrients available (annually) after losses from open lot, storage, or lagoon.1 Enter the total manure nutrients produced (from Table 31-1) in Columns 2, 5, and 8 and multiply by the relevant factor describing your manure management system.

1. Manure Storage/Treatment System N P2O5 K2O
2. N Produced (Table 31-1) 3. Mult Factor1 4. Available N after Losses 5. P2O5 Produced (Table 31-1) 6. Mult Factor1 7. Available P2O5 after Losses 8. K2O Produced (Table 31-1) 9. Mult Factor1 10. Available K2O after Losses
1 Multiplication factor is portion of nutrients retained in the manure. Remaining N volatilizes into air as ammonia and remaining phosphate settles to lagoon bottom as solids or is lost as runoff in open lot. Actual losses for individual situations may vary substantially from listed values.

Table 31-5: Potential N available after accounting for ammonia volatilization during land application.

Manure Source A. Available N after Storage/Treatment Losses (value from Table 31-3) B. Fraction of N Remaining after Land Application (see Table 31-2) Potential N Available after Storage and Land Application Losses Total = A * B
Type of Manure Application Method



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