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1. Ammonium nitrogen fertilizer
Ammonium nitrogen fertilizers include ammonium bicarbonate (NH4HCO3), ammonium sulfate {(NH4)2SO4}, ammonium chloride (NH4Cl), ammonia (NH3.H2O), liquid ammonia (NH3) and so on.
2. Nitrate nitrogen fertilizer
Nitrate nitrogen fertilizers include sodium nitrate (NaNO3), calcium nitrate {Ca(NO3)2}, ammonium nitrate (NH4NO3) and so on.
3. Ammonium Nitrate Nitrogen Fertilizer
Ammonium nitrate nitrogen fertilizers include ammonium nitrate, calcium ammonium nitrate, and ammonium sulphur nitrate.
4. Amide nitrogen fertilizer
Amide nitrogen fertilizer-urea {CO(NH2)2}, containing 46.7% N, is the fertilizer with the highest nitrogen content in solid nitrogen.