Design and Implementation of an Automated Irrigation System for Rice Farms in Kebbi State Using Soil Moisture Sensors

Agricultural water management remains one of the most critical challenges facing food production in north-western Nigeria, particularly in Kebbi State where rice cultivation is a dominant economic activity. This study presents the design and implementation of an automated irrigation system that integrates soil moisture sensors, microcontroller-based control logic, and motorized pumping units to regulate water delivery based on real-time soil conditions. The system employs capacitive soil moisture sensors interfaced with an Arduino Mega microcontroller, which processes sensor readings and activates or deactivates water pumps accordingly. A threshold-based algorithm was developed and programmed to maintain optimal soil moisture levels for rice at different growth stages. Field tests were conducted across three rice plots in the Bunza Local Government Area of Kebbi State during the 2023 planting season. Results indicated a 38 percent reduction in water consumption compared to conventional manual irrigation methods while maintaining comparable crop yields. The system also incorporates an LCD display for real-time parameter monitoring and a GSM module for remote farmer alerts. Cost analysis shows that the prototype can be fabricated using locally sourced components at a cost accessible to smallholder farmers. The study concludes that sensor-based automated irrigation is a technically feasible and economically viable solution for improving agricultural water-use efficiency in Nigeria's north-western region. Recommendations are provided for scaling the design to larger farm sizes and integrating solar power supply for off-grid deployment. Keywords: automated irrigation, soil moisture sensor, Arduino, rice farming, Kebbi State