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Impact of Water Table Fluctuations in Dug Wells on the Content of Nitrates in Water

100%

Stanek-Tarkowska J.

Journal of Ecological Engineering

2022

tom Vol. 23, nr 6

22--29

The present study indicates the quick response of a shallow aquifer to precipitation. The nitrate content in water from 20 wells was determined. The study showed a significant 1-m decrease in the water table in the studied wells at low precipitation levels (10 mm) in April (wells 13 and 16). In turn, the water table in the wells after the maximum rainfall in September (130 mm) increased by 0.5 m in well 19. The results of the chemical analysis of the water indicate that the permissible nitrate content was highly exceeded in wells 3, 17, and 18. The nitrate content in wells 1 and 2 was almost 50 mg/l, which is the permissible value for drinking water. The precipitation level did not influence the content of nitrates in the well water.

Cultivation systems for winter wheat (Triticum aestivum L.) and soil susceptibility to erosion

63%

Stanek-Tarkowska J. , Czyż E. A.

Journal of Water and Land Development

2024

tom no. 62

29--36

The purpose of the research was to check whether the reduced cultivation system reduces the risk of soil water erosion compared to traditional ploughing. One of the good parameters (indicators) to check is the examination of soil properties, mainly the content of readily dispersible clay (RDC), bulk density (BD), and soil water content (SWC). The soil organic carbon (SOC) content plays an important role in the soil erosion process. The field experiment on silt loamy soils was carried out for 12 years on an area of 1 ha, arranged as a random block with four repetitions, a total of eight plots per year. Two tillage systems were used: traditional (TT - inversion) and reduced (RT - without inversion). Fertiliser doses were the same for both cultivation systems. Analyses included determinations of the available forms of K, P, and Mg, as well as pH, SOC, SWC, BD, and RDC. The experimental results indicate that the soil under reduced RT cultivation was characterised by better chemical and physical properties compared to the soil under traditional TT cultivation. RT cultivation reduces the risk of soil erosion without reducing the yield of winter wheat. The 12-year study showed that, RT tillage reduces the risk of soil erosion without reducing winter wheat yields. Lower RDC values were determined under RT tillage, indicating a reduction in the content of easily dispersible clay, reducing the risk of soil erosion.

RÓŻNORODNOŚĆ ZBIOROWISK OKRZEMEK ROZWIJAJĄCYCH SIĘ W RZECE SAN W OKOLICACH JAROSŁAWIA

38%

Kochman-Kędziora N. , Pajączek A. , Peszek Ł. , Domszy P. , Noga T. , Stanek-Tarkowska J.

Rocznik Przemyski

2016

tom 52

nr 3(12): Nauki Przyrodnicze

3-26

Studies on the diversity of diatom assemblages in the San River, near the Jarosław City were conducted in period of 2009–2010. On two sites – designated before and after the City a total of 262 diatom taxa were determined. The most numerous group accounted diatoms from the genus Nitzschia, Navicula and Fragilaria, in addition, frequently occurred: Diatoma vulgaris, Achnanthidium minutissimum, Amphora pediculus, Encyonema ventricosum and Nitzschia acicularis. Studies conducted in the San River showed that among the enormous richness of diatoms dominated common species, cosmopolitan, α- and β-mesosaprobic, as well as oligo-and meso-eutrophic. Among the all identified taxa, 10% accounted diatoms rare and endangered, eg.: Pinnularia viridiformis, P. subrupestris P. microstauron. Cymbella aspera, Fragilaria dilatata, Gomphonema sarcophagus, Sellaphora bacillum, Stauroneis phoenicenteron, Fallacia subhamulata or Geissleria deccussis.