Major nutrients
Nitrogen (N)
Phosphorus (P)
Potassium (K)
Secondary nutrients
Micronutrients
Calcium (Ca)
Magnesium (Mg)
Sulfur (S)
Boron (B)
Chloride (Cl)
Copper (Cu)
Iron (Fe)
Manganese (Mn)
Molybdenum (Mo)
Zinc (Zn)
It is a good substitute for commercial fertilizers, especially when their prices are high
Poultry litter contains all essential plant nutrients
Litter contains all essential plant nutrients.  If soils are deficient in any of the components shown here, it may be economical to use litter in place of inorganic alternatives.