production & uses of NPK fertilisers

• what soluble salt is produced when phosphate rock reacts w nitric acid?

  calcium nitrate
• what soluble salt is produced when phosphate rock reacts w sulfuric acid?

  calcium sulfate & calcium phosphate (single superphosphate)
• what soluble salt is produced when phosphate rock reacts w phosphoric acid?

  triple superphosphate
• what are compounds of nitroge, phosphorus & potassium used for?

  as NPK fertilisers to improve agricultural productivity
• compare production of fertilisers in laboratory w industrial

  industrial process: large scale, quick, continous, high concentration, exothermic

  lab: small scale, lower concentration, less heat produced, slow