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Street-side trees in cities are characterized by poor health, with high salinity and pH, that leads to an early death. The main reason is soil salinity caused by winter road maintenance using salt (NaCl). Our research comprised three species of trees. A dependency was determined between their vigour and health and the content of biogenic elements, typical pollution, and indicators of ionic balance...
The content of total calcium in particular granulometric fractions is in most cases not correlated with particle size. In soil developed from boulder loam, total Ca content in the analyzed grain sizes increases with depth due to the presence of CaCO₃ below 100 cm. In turn, in soil developed from old-alluvial deposits, in which CaCO₃ was not noted, Ca content does not reveal any regularity in the particular...
Mortality, length and weight changes of bluegill fish (Lepomis macrochirus) were investigated at pH 1eve1s of 5.5, 6.5 and 7.5. A sulfurici/nitric (7:3) solution was used to simulate the effects of acid rain on bluegills. Fish at pH 5.5 had a significantly higher mortality and smaller 1ength and weight changes than those of 6.5 and 7.5. No significant difference in length and weight was observed in...
Opoka, as a silica-calcite sedimentary rock, occurs in south-eastern Europe and Russia. Stratigraphical studies down to 8 m depth were performed in Bełżec, Poland, where samples were taken for further analyses. Vertical layers represented a heavy-weight opoka consisting of relatively more CaCO3 than the horizontal layers of lightweight opoka dominated by SiO2 . Opoka had a mean bulk density of 1.34...
It was found that red clover utilizes from 1.1 to 1.4 kg of CO2 from the atmosphere to produce 1 kg of dry mattter. This means that 1400 to 1600m3 of atmospheric air become completely purified from carbon dioxide. Red clover plants usually lose 40.9% of their crop weight during the winter. This results from organic carbon loss equal (in CO2 units) to 41.8% for physiolopical processes. In the same...
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