Smart Irrigation Infrastructure Using Automated Canal Gate Control and Integrated NPK Soil Analysis Based on Microcontroller

Abstract: Efficient water management and soil nutrient monitoring are major challenges in modern agriculture due to increasing water scarcity and the demand for higher agricultural productivity. Traditional irrigation systems often rely on manual control and fixed irrigation schedules, which can lead to inefficient water use and reduced crop yields. This paper presents a smart irrigation infrastructure that integrates automated canal gate control with real-time soil nutrient monitoring using Nitrogen (N), Phosphorus (P) and Potassium (K) (NPK) sensors. The proposed system utilizes a microcontroller-based platform to collect environmental data from soil moisture sensors, ultrasonic water level sensors, and NPK soil nutrient sensors. Based on the sensed parameters, the system automatically regulates canal gates through a solenoid valve mechanism to ensure optimized water distribution. The system also provides real-time monitoring through a Liquid Crystal Display (LCD) interface, allowing farmers to observe irrigation conditions and soil nutrient levels. Experimental implementation demonstrates improved irrigation efficiency, reduced water wastage, and enhanced soil fertility management. The proposed system provides a cost-effective and sustainable approach for smart farming, particularly in canal-based irrigation regions.