Biological soil crusts (BSC) are associations among cyanobacteria, green algae, lichens, mosses and particles, which contribute to multiple ecosystem functions such as nitrogen fixation stabilization. The present work aims evaluate propagation conditions of different functional types BSC (dominated by cyanolichens, phycolichens mosses) potentially useful for the recovery degraded soils. In gree...

The origin of red or reddish-brown, clay-rich, ‘‘terra rossa’’ soils on limestone has been debated for decades. A traditional qualitative explanation for their formation has been the accumulation of insoluble residues as the limestone is progressively dissolved over time. However, this mode of formation often requires unrealistic or impossible amounts of carbonate dissolution. Therefore, where ...

This article applies the standard deviation of partial signal (SDPS) plots of electrochemical noise (EN) current signals originating from corrosion events on the symmetrical and asymmetrical electrodes made of uncoated and polypyrrole (PPy)-coated mild steel alloy in 4000 ppm NaCl+1000 ppm NaNO2 solution. Signal recording was performed after 30, 60, 90 min and 24 h from immersion...

In south-western France, sunflowers are usually grown in short rotations and after a long fallow period during which soils left bare. This practice can favour diseases, caused by soilborne fungi, such as sunflower verticillium wilt (SVW), well nitrate leaching, both of decrease yields. Growing cover crops is an agroecological that could provide ecosystem services mitigate SVW. A Brassicaceae cr...

The extraction efficiency of heavy metals from soils using three forms of gamma poly-glutamic acid (γ-PGA) as the washing agents was investigated. Controlling factors including agent concentrations, extraction time, pH, and liquid to soil ratio were evaluated to determine the optimum operational conditions. The distribution of heavy metal species in soils before and after extraction processes w...

■ Abstract Measurements of cosmogenic nuclides, predominately 10Be, allow new insights into the ways in which and the rates at which sediment is generated, transported, and deposited over timescales ranging from 103 to 106 years. Samples from rock exposures are used to estimate erosion rates at points on the landscape, whereas samples of fluvial sediment provide estimates of basin-scale rates o...

Understanding soil evaporation in reforestation processes in an area of extreme drought is important. We examined the effects of drip-irrigated, high-salinity groundwater on the formation of soil salt crusts and subsequent soil evaporation in the Taklimakan Desert Highway Shelterbelt. Soil evaporation was measured using micro-lysimeters (MLS, 20 cm in length × 10 cm in diameter), and chemical c...

in order to comparision of the micromorphic properties of saline-sodic and nonsaline-nonsodic soils in the west of urmia lake, four soil profiles (2profile in saline-sodic soils and 2profiles in nonsaline-nonsodic soils) were investigated. these profiles were described and sampled using standard methods. soil samples were used for physico chemical analysis and undisturbed and oriented samples w...

River processes and patterns are affected by changes in the watershed driven natural human-induced causes. A sudden pattern alteration from a “white river” (bare soils) to “green (vegetated) influences riverine biodiversity can increase flood risk. Despite these significant impacts, knowledge on triggers that kickstart feedback exacerbating bio-geomorphic is insufficient. In this study, we coll...