C of wetlands is often highly problematic due to the need to consider soil, plant, and Calcareous wetlands are of great interest in conservation biology. Previous research has suggested that there are significant differences hydrologic factors as fundamental components of these in soil microbial N cycle processes between calcareous wetlands develecosystems (Bridgham et al., 1996). The term wetl...

ABSTRACT- In the past few decades, accumulation of heavy metals, such as lead (Pb), in soils has increased as a result of human activities.The environmental hazard associated with soil enrichment in heavy metals is related to their mobility and plant availability. Application of various materials such as humic may influence the amount of Pb taken up by plant. Four levels of each of liquid and s...

in this study, calcareous nannofossils at the boundary between tirgan and sarcheshmeh formations at taherabad and mozduran sections have been studied. these sections are located in the eastern kopet-dagh basin. 22 nannoplankton species of 14 genera in taherabad section and 20 species of 14 genera in mozduran section were identified. according to the first occurrence of index species and fossil ...