Bulgarian Journal of Agricultural Science
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Unmanned drone multispectral imaging for assessment of wheat and oilseed rape habitus
Marina Stoyanova, Alexander Kandilarov, Vesselin Koutev, Olga Nitcheva and Polya Dobreva
Abstract: The use of unmanned drones has been increased in precision farming. From multispectral images of terrain and crops to spraying and sowing, their application and development is becoming more and more popular in the public sector. Using different sensors and equipment farmers could take optimal management decisions.
The aim of the present study is to analyze the data from a multispectral camera, to survey the development of the crops on the field, to perform an agronomic assessment and to make recommendations for optimization of the production by soil and plant sampling in order to increase yields and reducing the cost of production.
Effectiveness of multispectral observation methods on agricultural crops was tested at the end of October 2018 in a pilot study on the territory of Northern Bulgaria. First year results are the part of a planned long-term study to identify problem areas of the terrain by spectral analysis and additional sampling. Five channel multispectral camera Parrot Sequoia was applied on a DJI Matrice 600 Hexocopter. Observed crops were wheat and oilseed rape. NDVI method permitted us to identify areas with good crop development and area with poor vegetation status. Digital elevation models (DEM) were built for both studied areas. Fields area was divided on parts with NDVI higher than 0.7 and with NDVI with lower than 0.7 for optimal fertilizers application.
Keywords: crop habitus; DEM; multispectral survey; NDVI index; Remote sensing; wheat and oilseed rape
Date published: 2021-10-19
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