Option 2- Ammonium sulphide is not used as a fertilizer.

Fertilizers are materials that are added to soil to enhance plant growth and improve crop yields. They provide essential nutrients such as nitrogen, phosphorus, and potassium, which are necessary for plant growth.

Option 1- Ammonium nitrate is commonly used as a fertilizer due to its high nitrogen content. Nitrogen is an essential nutrient for plant growth and is necessary for the formation of proteins and chlorophyll.

Option 3- Ammonium phosphate is also used as a fertilizer. It provides both nitrogen and phosphorus, which are crucial for plant growth. Phosphorus is involved in energy transfer and root development.

Option 4- Ammonium sulfate is another fertilizer that contains both nitrogen and sulfur. Nitrogen is important for leaf and stem growth, while sulfur is necessary for the synthesis of amino acids, proteins, and enzymes.

Overall, all options except option 2 are commonly used as fertilizers because they provide essential nutrients for plant growth. It is important to choose the correct fertilizer based on the nutrient needs of the specific crops and soil conditions.