Nutrient sensors in irrigation systems provide farmers with real-time insights into soil and water nutrient levels, enabling precise management of crop nutrition. These sensors detect key elements such as nitrogen, phosphorus, and potassium, allowing for dynamic adjustment of fertilizer application in response to plant needs. By integrating sensor data with irrigation schedules, farmers can optimize growth, reduce nutrient wastage, and minimize environmental pollution. This technology supports sustainable farming practices while enhancing crop productivity and resource efficiency. This review explores the types, working principles, and applications of nutrient sensors in modern irrigation systems.
