## 1 Introduction
[8] claimed that fluorine in calcium-rich soils binds to insoluble compounds, such as CaF\({}_{2}\), or apatite compounds of approximately the same composition, thus limiting fluorine availability to plants. [PERSON] et al. [9; 10; 11] indicated that fluorine has a high affinity to aluminum in loam. Fluorine is easily bound to loam via an anion exchange process. Fluorine is bound by magnesium and calcium, forming hardly soluble compounds. Magnesium and calcium are found in large amounts in loam. The stress induced by the presence of fluorine compounds manifests itself as changes in the physicochemical properties of soil, which in turn influences the chemical composition of crops [12]. Fluorine acts as a xenobiotic even when present in low concentrations, and in areas where fluorine emissions are elevated, e.g., in the vicinity of phosphate plants, aluminum plants, steelworks, glassworks, earthenware plants, and municipal heat and power plants [13], this element accumulates heavily in soils and plants, reducing the yields and yield quality of crops [14; 15; 16; 17; 18]. It is therefore essential to constantly monitor the content of this element in agricultural products, especially when crops are grown in such areas as mentioned above. The relevant references still lack sufficient amounts of data on the effect of fluorine on the content of macronutrients in plants, hence this study was conducted to explore the influence of soil contamination with fluorine on the content of sodium and sulphur in crops under the conditions of lime, charcoal, and loam applications. The results presented in this study are a continuation of previously published works from widely undertaken research on the simulation of soil contamination with fluoride and its impact, among others on the content of this contaminant in plants [2], the yield development and content of nitrogen components [19], the content of calcium and magnesium [20], or publications on the impact of fluoride on the content of endo- and exogenous amino acids in maize and yellow lupine [21]. Sulphur is an important nutrient for plants, and cruciferous plants including rapeseed, radish, cabbage, and legumes show a particularly high demand for this element. The most important organic compounds of sulphur include sulphuric amino acids, i.e., cystine and cysteine, which are the redox system of plants. They play a significant role in the nitrogen management of plants. Plants uptake sulphur from the soil in the form of SO4\({}^{2-}\) and SO2 ions from the air. With a sulphur deficiency, plants have small, pale green leaves and thin stems with heavily woody strengthening tissue. Adequate sulphur levels not only increase yields but also improve their quality by reducing the content of nitrates and increasing the number of carotenes in feed and oil in oilseeds. Well-met needs of plants regarding this ingredient increase their resistance to frost and drought. In turn, excess sulphur in the environment deteriorates soil properties and leads to plant poisoning. This occurs especially in industrial districts, which should be remembered when selecting mineral fertilizers for the plants grown there. In turn, on one hand, sodium does not fulfill the criterion of a plant nutrient and is classified rather as a minor component. On the other hand, it is a valuable component of plants used as animal feed. Therefore, sodium is regarded as a useful element. Adequate sodium in feed is an important factor in determining animal performance. For example, to cover the daily sodium requirement of dairy cows, approximately 2 g per kg should be added to basic feed. Very often, however, the average sodium level in the biomass of grassland significantly deviates from the required standard and ranges between 0.1 and 1 g per kg of dry matter. Its deficiency leads to a loss of appetite, loss of milk yield, and weight loss, and even deterioration of health and fertility. Sodium has a beneficial effect not only on the physiology of nutrition, but it also increases the taste of green fodder.