How is ammonium sulphate [a fertiliser] made in a lab?

Drops of methyl orange indicator added to a set volume of ammonia sulfate solution in a conical flask Dilute sulfuric acid is added until turns orange When volume of sulfuric acid added is recorded then neutral ammonia sulfate with indicator is thrown away Experiment is repeated without indicator with same volumes of sulfuric acid and ammonia Ammonium sulfate is crystallised and then dried