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Nitrogen Fertilizer: Diammonium Phosphate
Factsheet about the chemical properties of diammonium phosphate.
Nitrogen Fertilizer: Ammonium Nitrate
Detailed chemical factsheet about the properties of ammonium nitrate.
Washington State Department of Agriculture
Information on products and their content of heavy metals, along with fertilizer laws and label requirements.
Nitrogen Fertilizer: Ammonium Sulfate
Factsheet offering information about ammonium sulfate.
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