Urea and Calcium Ammonium Nitrate (CAN) are both widely used nitrogen fertilizers, but the question is not simply which one is “better” or whether one can directly replace the other. Their real differences lie in: nitrogen concentration, nitrogen form, nutrient availability, response speed, and their sensitivity to temperature, moisture, and application method. So in practical crop nutrition, the better question is not: “Which fertilizer supplies nitrogen more effectively?” b