Droplet Deposition of Leaf Fertilizers Applied by an
 Unmanned Aerial Vehicle in Coffea Canephora Plants

The yield of coffee plants depends on several factors, and the leaf nutrition is one most important. form application fertilizers used expensive considering efficacy adherence absorption nutrients. objective this work was to evaluate effect configurations operational parameters centrifugal nozzle rotation height in Conilon plants. coverage, density, deposition spray droplets were evaluated through water-sensitive paper tags artificial targets. macronutrients applied confirmed analyses at 15 30 days after application. with a flight 2.0 m 10,000 rpm adequate, coverage 12.4% density 127 cm−2. foliar by UAV provided distribution newer leaves which greater, resulted best parameters.