Cow manure is rich in __________
A. Hydrogen
B. Phosphorus
C. Nitrogen
D. Potassium
The question was posed to me in final exam.
My question comes from Anaerobic Fermentation topic in portion Biomass Energy of Energy Engineering
Right option is C. Nitrogen
The explanation: Cow dung is the undigested residue of plant matter which has passed through the animal’s gut. The resultant fecal matter is rich in minerals. Color ranges from greenish to blackish, often darkening soon after exposure to air. And it is very rich in nitrogen.