Remote sensing of agrophytocenoses from the UAV platform to assess the level of plant nutrition
| Autor: | N. Pasichnyk, О. Opryshko, O. Tarariko |
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| Rok vydání: | 2021 |
| Předmět: | |
| Zdroj: | Agroecological journal. :75-81 |
| ISSN: | 2077-4915 2077-4893 |
| Popis: | Unmanned (remotely controlled) aircrafts (UAVs) are innovative equipment for monitoring fields that are free from a lot of the disadvantages of satellites such as availability, low cost, and high image resolution. However, the quality, reproducibility and suitability of spectral monitoring data of plantations for crop management processes remain topical issues. Since spectral monitoring is a necessary component in the concept of crop management, the development of a methodology for assessing the suitability of remote monitoring spectral data for the calculation of agrochemical practices was the purpose of the work. According to the publications, the dependence of the number of pixels on the values of the intensity of color components for plants and soil is described by the Gaussian distribution. Deviation from such distribution is caused by the imposing of distributions from various objects fixed on a photo. The experimental test was carried out on the basis of wheat, using the results obtained during 2017–2020 when considering the stresses of nutrient deficiency. UAVs with a specialized Slantrange spectral complex with standard Slantview software and an FC200 visible spectrum camera (from the Phantom 2 UAV) were used for monitoring. The investigation found experimental evidence that the pixel distribution of plantations on the example of the wheat crop is described by the Gaussian distribution. It was found that the analysis of the correspondence of the nature of the distribution on the spectral channels, namely the presence of several max peaks that affects the value of the distribution maximum may indicate the presence of foreign inclusions or a transitional stage of vegetation. The suitability of the data can be assessed on the basis of the reference values of the width of the distribution on the spectral channels. This determines the feasibility of introducing in the sets of regular vegetation indices of geographic information systems additional packages that reflect the spectral channels. |
| Databáze: | OpenAIRE |
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