Monitoring wheat NDVI variation using a small UAV in Southern Dobrudja

Asparuh Atanasov

Authors

Asparuh Atanasov Technical University, Faculty of Faculty of Mechanical Engineering, Department Mechanics and Elements of Machines, 9000 Varna, Bulgaria Author https://orcid.org/0000-0001-9898-8472

Keywords:

common wheat, Normalized Difference Vegetation Index (NDVI), spectral vegetation indices, Unmanned Aerial Vehicle (UAV)

Abstract

For the needs of precision agriculture, it is important to create a database on the trends of changes in vegetation indices. The correct interpretation of the data for a specific region is useful for reading and planning subsequent treatments. The research was conducted with a small UAV equipped with a NIR camera in the period 2019-2022 in three fields in southern Dobrudja. The aim is to track the dynamics of NDVI changes in wheat. To create a database on the trends of change in NDVI in the specific agrarian climatic conditions of southern Dobrudja. The dynamics of the index during the period of extreme drought 2019-2020 have been tracked. Maximum values are recorded in the spindle phase - grading at the beginning of May. Returning frosts at the beginning of March lower the value sharply. The dynamics of NDVI during the phenological development of wheat was tracked, as a maximum of 0.5 was reached during the grading period. Humidity analysis gives a direct link to NDVI change trends with a week lag of the changes that occurred.

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