نتایج جستجو برای: pedogenesis
تعداد نتایج: 221 فیلتر نتایج به سال:
We separated dust particles from the mesh-filtered sets of rainwaters collected on rainy days with daily precipitations exceeding 10 mm per day. A total of 136 rainwaters (or snow during the winter season) samples collected from February 2009 to February 2013 were analyzed. In particular, 33 out of 136 rainwaters were collected during or just after the Asian dust storm (ADS) events. Values of p...
Field and laboratory data combined with geochronological information were used to investigate the nature and rates of pedogenesis of three late Holocene soils at the Lubbock Lake archaeological site (Southern High Plains of Texas). A variety of pedologic characteristics become better expressed with time, and aerosolic additions and burial of the soils significantly affect the development of the...
Investigations were carried out in the European Russian Northeast (Komi Republic), -in middle taiga subzone, (construction sand) quarry area. Formation of soil profile within two decades after forest reclamation practices (Pinus sylvestris planting) was considered. Specifics litter and humus horizons formation, processes formation accumulation on substrates different granulometric composition d...
Previous synchrotron X-ray microprobe measurements of Zn speciation in contaminated and uncontaminated soils have identified phyllosilicate as the main sequestration phase. The emphasis now is focused on comparing the nature and properties of neoformed and geogenic phyllosilicate species to understand natural attenuation processes. Refined structural characterization of the two types of Zn-cont...
High levels of nanodiamonds (nds) have been used to support the transformative hypothesis that an extraterrestrial (ET) event (comet explosion) triggered Younger Dryas changes in temperature, flora and fauna assemblages, and human adaptations [Firestone RB, et al. (2007) Proc Natl Acad Sci USA 104(41):16016-16021]. We evaluate this hypothesis by establishing the distribution of nds within the B...
Heavy metals (HM) are among the most hazardous soil pollutants. The intensity of accumulation and distribution HM in soils directly depends on ecological conditions pedogenesis its buffering properties. At same time, a significant as result anthropogenic impacts reduces capacity resistance to pollution. purpose this work was assess pollution Don River delta coast Taganrog Bay Sea Azov undergoin...
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