Two Fertilizers Containing Nitrogen:
1. Ammonium Nitrate:
- Ammonium nitrate is a commonly used nitrogen-based fertilizer that contains both ammonium (NH4+) and nitrate (NO3-) ions.
- It is highly water-soluble and provides a readily available source of nitrogen for plants.
- Ammonium ions are converted into nitrate ions through a process called nitrification, which is facilitated by soil microorganisms.
- The nitrate ions are then taken up by plant roots and utilized for various physiological processes, including growth and protein synthesis.
- Ammonium nitrate is often used in agriculture to promote vegetative growth and enhance crop yield.
- It is also used in the manufacturing of explosives, which is why its sale and distribution are strictly regulated in many countries.

2. Urea:
- Urea is another widely used nitrogen-based fertilizer that contains approximately 46% nitrogen by weight.
- It is a white crystalline substance that is highly soluble in water.
- Urea is considered a slow-release fertilizer as it undergoes hydrolysis in the soil, gradually breaking down into ammonium ions.
- The ammonium ions formed from urea are then subjected to nitrification, just like ammonium nitrate, and converted into nitrate ions.
- Urea provides a long-lasting and sustained release of nitrogen, making it suitable for crops with high nitrogen requirements.
- It is commonly used in both agricultural and horticultural applications.

One Fertilizer Containing Phosphorus:
1. Triple Superphosphate (TSP):
- Triple superphosphate is a phosphorus-based fertilizer that is produced by treating phosphate rock with phosphoric acid.
- It contains a high concentration of water-soluble phosphorus in the form of monocalcium phosphate.
- TSP is readily available to plants and can be quickly absorbed by their root systems.
- Phosphorus is an essential nutrient for plant growth and development, playing a crucial role in processes such as energy transfer, root development, and flowering.
- TSP is commonly used in agriculture to promote root development, improve fruit and flower production, and enhance overall plant vigor.
- It is particularly beneficial for crops with high phosphorus requirements, such as legumes, root vegetables, and flowering plants.
- TSP is usually applied during the planting stage or as a top dressing to ensure an adequate supply of phosphorus throughout the growing season.

In summary, ammonium nitrate and urea are nitrogen-based fertilizers that provide plants with readily available nitrogen, promoting healthy growth and development. Triple superphosphate, on the other hand, is a phosphorus-based fertilizer that enhances root development and overall plant vigor. These fertilizers play a crucial role in ensuring optimal nutrient availability for plants, thereby maximizing crop yield and quality.