Drones, Volume 5, Issue 3 (September 2021) – 48 articles
Cover Story (view full-size image):
Unmanned aerial vehicles (UAVs) represent an essential resource in precision agriculture, as they are able to provide images daily and at a very high resolution. This study is aimed at identifying the optimal level of nitrogen (N)-based nutrients for improved productivity in a crop field of “Tropea red onion”. Monitoring of the entire crop cycle using multispectral UAV imagery was carried out. The Soil-Adjusted Vegetation Index (SAVI) was used for monitoring the crop response to three different levels of N fertilization: 150 kg N ha-1, 180 kg N ha-1 and 210 kg N ha-1. The combination of SAVI values used for identifying the crop’s coverage through GEOBIA, with an analysis of soil properties and yield data, showed significant relationships between the different indicators investigated. A higher yield corresponded to a 180 kg N ha-1 dose and higher SAVI values. View this paper.
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