Urea fertilizer is a high-nitrogen, solid organic compound (CO(NH2)2) containing 46% nitrogen, commonly used in agriculture to boost crop growth and yields. Produced by reacting ammonia with carbon dioxide, it is popular due to its low cost, high solubility, and efficiency. It is widely used for direct soil application, granular, or foliar feeding, often labelled as urea-ammonium nitrate.

NPK fertilizer is a three-component plant nutrient mixture containing nitrogen (N), phosphorus (P), and potassium (K), which are essential macronutrients for plant growth, health, and yield. The NPK ratio on packaging represents the percentage of each nutrient (e.g., 10-10-10), indicating its suitability for enhancing leaf growth, root development, or fruit production.

Monoammonium Phosphate (MAP) is a highly water-soluble, granulated or powder fertilizer (typically 11-52-0 or 12-61-0 NPK) that provides a concentrated source of phosphorus (N2O5) and nitrogen (N) for plants. Known as ammonium dihydrogen phosphate (NH4H2PO4), it is prized as a starter fertilizer due to its low nitrogen levels, high phosphorus content, and acidity, which helps maximize nutrient absorption in neutral and alkaline soils.

Sulfur is a refined petroleum by-product that, when combined with specific additives, is transformed into a form that is absorbable by plants or usable in various industries. Sulfur fertilizer is a chemical fertilizer composed of compact and granulated particles, typically made by combining elemental sulfur with bentonite or other swelling agents. 

Granulated Sulphate of Ammonia is a high-quality, free-flowing, granular fertilizer containing roughly 20-21% nitrogen (in ammonium form) and 24% sulphur. It is used to improve plant vitality, encourage lush green growth, and supply sulfur, especially in alkaline or sulfur-deficient soils. It is widely used in dry bulk blending, as a base fertilizer, or top-dressed for crops like rapeseed, corn, and fruit trees.