Automatic water and fertilizer sprinkling system based on PLC for Agriculture application


  • Syed Irfan Udin



Programmable logic controller, moisture sensor, pH sensor, solenoid valve, relay, automatic irrigation system.


In recent times automation based on PLC is increased in almost all industry environments. This paper presents an automatic irrigation system based on PLC employing moisture and PH sensors. The function of soil moisture sensor is to identify the amount of water required for irrigation; PLC then controls the water pump through a relay and a solenoid valve based on moisture content that is less or at correct level. Fertilizer spraying system is also added to the water irrigation system based on pH content in the soil. If PH level is less than 5.5 or higher than 7 that is if it is more acidic or becoming neutral then spraying motor is turned off and particular solenoid valve is closed. Agriculture using automation techniques like Automatic moisture detection and water sprinkling system and fertilizer spray system according to predefines time interval and fertilizer spray cut off due to high or lower pH value than the optimum pH value for healthy plant growth, by this system agriculture can be done efficiently and lead to increase in crop production and quality. The proposed automation scheme is implemented in real time using Siemens LOGO PLC platform and it produced an automatic irrigation system which also minimizes the cost required during irrigation.


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Author Biography

Syed Irfan Udin

Dept of Electronics and Instrumentation, Bharath university, Chennai.


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