Nitrogen Fertilizer refers to one of the most common categories of fertilizers produced out of nitrogen (N) chemical combinations. To be considered as an organic fertilizer, the plant nutrient must contain 5% minimum of nitrogen.
Organic fertilizers that are high in nitrogen include urea, which is derived from urine, feathers, dried blood and blood meal. Feathers contain 15 percent nitrogen; dried blood contains 12 percent nitrogen; and blood meal contains 12.5 percent nitrogen.
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