Maryam Karimi Motlagh - Ph.D Student, Department of Agricultural Mechanization Engineering, Science and Research Branch, Islamic Azad University, Tehran, Iran.

Smart agriculture, refers application of various technologies in the agricultural industry, which includes intelligent monitoring of farms and gardens, greenhouses, and the use of robots. spray experiments design were performed with three factors: spray volume, flight height and flight speed and three levels by Drone T۲۰ in a Maize field. For the density of droplet deposition of ۲۰ liters per hectare of spray volume, ۳ meters of it was optimal. The upper layer of flight height and flight speed of ۴ m/s was used for it. It was like this for the middle and lower layers, using ۲۰ liters per hectare of spray volume, ۲ meters flight height and ۴ meters per second flight speed. For uniform droplet deposition, the optimal time for the upper layer was found using ۲۰ liters per hectare spray volume, ۴ meters flight height and ۴ meters per second flight speed and ۲۰ liters per hectare spraying volume, ۳ meters flight height and ۴ meters per second flight speed for the middle layer, and ۱۲ liters per hectare of spray volume, ۳ m flight height and ۵ m/s flight speed for the bottom layer was suitable for infiltration of sediment droplets, using ۱۲. L/Ha spray volume, ۴ m flight height and ۴ m/s flight speed under the comprehensive investigation of the density, uniformity and penetration of droplet deposits, the optimal spraying parameters were ۲۰ liters per hectare. The volume, flight height ۳ m and flight speed ۴ m/s

Drone (T۲۰) , Droplet deposition , Uniformity, Penetrability, Forage Maize