This study is designed to develop an automatic irrigation system that switches (ON/OFF) a pump motor by sensing the moisture content of the soil using wireless technology. Through GSM Modem, the sensed moisture content data will be sent as an SMS to the user. The project uses 8051 series microcontroller, which is programmed to receive the input signal of varying moistures of the soil through sensors. This is achieved by using an op-amp as comparator which acts as interface between the sensing device and the microcontroller. Once the controller receives the signal, it generates an output that drives a relay for operating the water pump. It also sends an SMS to the concerned number using GSM modem. An LCD display is also interfaced to the microcontroller to display the status of the soil and water pump ON/Off condition. The sensing arrangement is made using two stiff metallic rods inserted to the agricultural field required to be in control. Connections from the metallic rods are interfaced to the control unit. This concept can also be enhanced by integrating XBEE/Bluetooth technology, such that whenever the water pump switches ON/OFF, the information is sent to a smart mobile phone or XBEE transceiver module regarding the status of the pump.