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The aim of the study is the evaluation of multispectral imaging by unmanned aerial vehicles (UAV) and free available satellite data (Sentinel — 2) for the diagnosis of the nutritional status of winter wheat. For this purpose, a field trial was established in 2020 (28 ha of winter wheat), both on the fields of farm enterprise ZD Kojcice (Pelhrimov, Czech Republic). The observation of the fields was performed in two vegetation phases important for the application of nitrogen fertilizers to cereals by topdressing (BB...

Assessment of the nutritional status of crop stand and other plant biophysical parameters can be a suitable source of information for the application of nitrogen fertilizers in precision agriculture, especially in conditions of high spatial heterogeneity of farm fields. Determination of the application rate of nitrogen fertilizers can be performed based on the plant diagnosis and estimation of plant biophysical parameters, such as nitrogen content, total amount of aboveground biomass and nitrogen uptake (Nupt), or...