Urea stands as the single most widely used and produced nitrogen fertilizer in the world due to its high nitrogen nutrient content, cost-effectiveness, and versatility across diverse global crop types. Following urea, other heavily utilized primary fertilizers include monoammonium phosphate, diammonium phosphate, and various potassium-based compounds like muriate of potash. These macronutrient fertilizers form the backbone of modern global agriculture, essential for maximizing crop yields to feed a growing world population.