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Pakistan's economy is mostly based on agriculture. The country faces big problem of water shortage and mismanagement. To cope up with this situation some IT based irrigation control system should be implemented that can deal with proper monitoring, distribution of water etc. We propose a Wireless Sensor and Actuator Network (WSAN) for Irrigation control which is low cost, ensures proper monitoring of the field, less human involvement, instant and accurate decision making. Different kinds of sensors are used and scattered throughout field to collect required data that is then processed and analyzed. It is a fact that a close relationship lies between agriculture and irrigation. The increase in the water-needs of the country has directly proportion to the shortage of the water resources. The efficient management & maintenance of water resources and controlling the water wastage will improve the water resources that are the most beneficial factors in the agriculture. The proposed Sensor-based model monitors many environmental parameters like temperature, humidity, soil moisture, etc.