Tests were carried out on stationary field trial, soil type vertisol in the process of degradation. The land on which the view is derived is characterized by low pH (pH<5.0). The Dose of nitrogen was 120 kg N/ha, which was administered in combination with phosphorous and potassium fertilizer. The tests showed a significant grain yield. Nitrogen had a most significant impact on the yield of wheat. The average grain yield of all treatments in the 2008/09 growing season was significantly greater than in the following years, mostly as the result of highly favourable weather conditions at major stages of plant development. The average highest yield was achieved in the variant N120P100K60 (5.528 t/ha), although the high yield of more than 5 t/ha was obtained and the triple treatments NPK where nitrogen is applied in the maximum amount of 120 kg/ha, 60 kg/ha P 2 O 5 and 60 kg/ha K 2 O as well as variants NP in a quantity of 100 kg/ha P 2 O 5 and 60 kg/ha K 2 O. Also, the 1000-grain weight was highest in balanced fertilization with all nutrients NPK (40 g), in a quantity of 120 kg N/ha, 100 kg/ha P 2 O 5 and 60 kg/ha K 2 O. Averaged across years, significantly higher values for test weight were found in the control (76.91 kg/hl). Variance analysis showed statistically significant differences for grain yield and test weight between the vegetation seasons. Significant differences for 1000 grain weight between the variants of fertilization.

The concentrations of iron, lead, cadmium, copper, manganese, mercury and arsenic were measured in water, sediment, five macrophytes (Typha angustifolia, Iris pseudacorus, Polygonum amphybium, Myriophyllum spicatum and Lemna gibba) and five fish species (Sander lucioperca, Abramis brama, Carassius gibelio, Silurus glanis and Arystichtys nobilis) in the Gruža Reservoir, used for water supply and recreational fishing. The concentrations of all examined elements were higher in sediment than in water. The values of the ratio between element concentrations in the sediment and those in the water were the highest for Fe and As. Among the five plant species, the highest concentrations of Pb and Mn were observed in T. angustifolia, while the highest concentrations of Fe, Cu and Hg were in L. gibba. I. pseudacorus and P. amphybium had the highest concentrations of Cd and As, respectively. Among the fish species, C. gibelio showed the highest tendency of element accumulation (Fe, Cd, Cu), followed by S. lucioperca (Pb, Hg), A. brama (Mn) and A. nobilis (As). The average concentrations of elements in fish muscle, except for As in A. nobilis (2.635 ± 0.241 mg kg(-1) ww), were below the limits that are considered safe for human consumption in accordance with the European Commission Regulation and Official Gazette of Serbia.

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Allium ursinum L. (A. ursinum, family Amaryllidaceae), better known under the name of wild garlic, ramson or bearís garlic is a perennial herbaceous plant. It naturally grows in fens and marshes of Europe and Asia (1-3). Increasingly, popular in European kitchen A. ursinum can be used as a salad, spice or vegetable since all parts of the plant are edible. Throughout history leaves, bulbs and the aerial part of this plant species have been used in traditional medicine as therapeutic and prophylactic agents (4-6). Numerous biologically active compounds enable this plant species to be implemented in the healing of various conditions for years. The most common are sulfur compounds which are considered to largely contribute to the pharmacological activity and from which originates a characteristic smell and taste (7). In addition to a significant presence of phenols, flavonoids, there are in a lesser extent other steroidal glycosides, amino acids, fatty acids, lecithin, essential oil (4, 8, 9). The aforementioned bioactive compounds can be exploited and used in the form of various extracts. Experimental investigations indicate the efficiency of the application A. ursinum in prevention and treatment of many diseases such as cardiovascular diseases, cancer, obesity, diabetes, disorders of the gastrointestinal tract, elevated cholesterol level, as well as the inflammatory diseases (10-14). Itís been known that the applied extraction method and extraction solvent may substantially affect the quality and concentration of targeted com