Hey you forgot human urine,very rich in nitrogen.
FireBrand77 Reviewed by FireBrand77 on . Sources of Organic/Natural Nitrogen I thought i would post up a few good natural/organic sources of nitrogen. You can usually buy these "raw" products at a local garden center. Blood Meal:(fast release) Made from dried animal blood, mostly cattle, and usually an N-P-K of 13-0-0. Feather Meal:(medium/slow release) Made from poultry waste, usually an N-P-K of 10-0-0. Fish Meal:(fast release) Made from remains of fish, usually an N-P-K of 10-0-0. Rating: 5