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Th is paper presents the results of soil fertility analysis on the production plots of the city of Kragujevac, Serbia. Th e analysis was conducted on a total of 467 plowland samples. Th e acid soil reaction, which belongs to the fi rst three classes in the applied classification, was found in 86.56% of samples. On average, neutral soil reaction, which is the most favourable type of reaction for crop production, was found in 15.63% of all samples in this study. Regarding soil humus content, the results show that 59.54% samples are well supplied with humus, while 35.77% of the samples belong in the class of mostly slightly humic. Considering the readily available phosphorus content, the analysis showed that only 6.34% of the soils in the province have an optimum supply of this element. What is of concern is that a considerable proportion of our samples were determined to be either very poor (57.12%) or poor (19.28%) in phosphorus, while about 10% had harmful or toxic levels of this macronutrient. In the case of the levels of readily available potassium, the largest number of the samples had either an optimum or high supply of the element. Th e sum of such samples ranged from 54.54% to 97.73% depending on the area. [ABSTRACT FROM AUTHOR]

This paper presents the results of 30 representative samples of alluvial-diluvial soils of Srem region of Serbia. The following basic chemical properties were examined: active soil acidity (pH in H2O), substitutional acidity (pH in 1M KCl), CaCO3 content, humus content, total nitrogen content, and content of available forms of phosphorus and potassium. The paper shows the characteristics, origins, behaviour and content of total and available nickel in the soil. Average value of total nickel in the analyzed soil samples was above the MAC 115.95 mg kg-1, while the mean value of available nickel was 1.484 mg kg-1. The share of available nickel in total nickel is a good indicator of the origin of soil contamination. Having identified a low percentage of readily available nickel in total nickel (an average of 1.36%), we can conclude that the content of Ni in the soils of Srem is of natural origin and that there is no threat that this element would enter the food chain. [ABSTRACT FROM AUTHOR]