Inorganic fertilisers?

Question

What are two examples or two names of inorganic fertilisers?

thanks for any help

Answer 1

Those contain chemical nitrates like potassium nitrate or any other of the water soluble salts like potassium phosphate. It's easy to tell those chemicals from organics like guano or manures (no chemical trade names or formulas). Be aware though that some organics are altered and the contents usually describe it someplace on the container, at least in terms like "75% organic".

Answer 2

There are hundreds of inorganic fertilizers available for purchase in the USA.  

The primary ones utilized in this part of the world are:

Fertilizer          N/P2O5/K20    Primary use/Market

Anhydrous  Ammonia      82-0-0              N source, Row Crops (RC)

  

Urea                  46-0-0             N Source, RC, Pastures/Turf*

Ammonium  Nitrate     34-0-0             N Source, Pastures/Turf

Ammonium  Sulfate       21-0-0-24S    S source, all crops



Di-ammonium  Phosphate  18-46-0          P Source, All crops

              

Muriate of  Potash             0-0-60          K source, All crops

    

Potassium Magnesium Sulfate        0-0-22-11 Mg, 22 S                                  Mg, S source, all crops

These are the chemical salts (except urea, it is not a salt) that are stored in the fertilizer plant bins on site.

These can be blended (exception DO NOT store Urea and Ammonium Nitrate in the same building.  Blending these two form UAN, aka the liquid fertilizer 32-0-0) to provide the primary nutrients needed for crop production in northeast Texas).

Micro-nutrients may be added to the blends, but these are usually "bundled" together and sold to the fertilizer plant in 50 pound bags.

* Urea is technically an organic compound (it contains carbon), not a salt and requires exposure to Urease (a natural plant compound) to break down into ammonia.  When exposed to water, ammonia (a gas) forms ammonium (NH4) which is plant available.  If Urea is exposed to urease but not water the gas will volatilize and escape into the atmosphere.  This primarily happens during warm (>85F) weather.  Urea volatility loss is extremely variable and, during the summer time, somewhat unpredictable (depends on rain, dew, soil moisture, soil pH, calcium levels, etc, etc).