Does Drone Data Allow the Assessment of Phosphorus and Potassium in Soil Based on Field Experiments with Winter Rye?

The evaluation of the nutrient content in soil, such as potassium and phosphorus, is very important, especially precision agriculture, where fertilizer rate should be adjusted to field variability terms content. Soil chemical analysis time-consuming expensive, dense soil sampling not always possible. In recent years, remote sensing methods have been used assess within-field crop nutritional status. main aim this study was evaluate relationship between UAV-derived spectral reflectance for winter rye a long-term experiment different fertilization with phosphorus potassium. conducted 2022 two experiments which cultivated monoculture rotation. were located central Poland Skierniewice. Statistical analyses performed using univariate multivariate methods, e.g., correlation, regression, principal component (PCA). effect on weak, weaker comparison nitrogen fertilization. stronger than On basis correlation coefficients PCA, negative relationships proven available range blue, green, red bands positive edge near-infrared bands. first (PC1) strongly correlated almost all bands, either positively or negatively. weak PC1 rotation, while monoculture, slightly stronger, indicating deficiency monoculture.