The use of pesticides and fertilizers in agriculture has vital importance for crop yield. The traditional or conventional methods of irrigation like flood, drip or sprinkler irrigation have their limitations. The solution for these constraints was the basis of the development of smart irrigation system. However, the hardware installation for the smart irrigation system uses excess cultivated land. The remedy to this problem is the use of quadrotors. The use of aircraft is increasing and has now become a common sight. This task is carried out using these drones mainly because of their speed and effective spraying. This paper describes the architecture of Unmanned Aerial Vehicle (UAV), which is deployed to implement a control loop for different techniques in agriculture where UAVs are instrumental in spraying chemicals on crops.

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