A constant head permeability test of the coarse-grained soil an earth-rockfill dam was carried out and gradation tested determined based on continuous equation. Based results, empirical formula coefficient considering influence established. The can be used to assess with respect area under curve. applicability verified results from other studies. It found that suitable for soil. This paper prov...

The compression index and recompression index are one of the important compressibility parameters to determine the settlement calculation for fine-grained soil layers. These parameters can be determined by carrying out laboratory oedometer test on undisturbed samples; however, the test is quite time-consuming and expensive. Therefore, many empirical formulas based on regression analysis have be...

[1] Soil sulfates are present in arid and hyperarid environments on Earth and have been found to be abundant in soils on Mars. Examination of soil gypsum from the Atacama Desert, Chile, the Mojave Desert, United States, and Al-Jafr Basin, Jordan, revealed endolithic cyanobacteria communities just below the surface of soil gypsum samples. Optical and scanning electron microscope observations of ...

Specifying the soil types and profiling the subsurface soil layers are the excellent examples of CPTu test potentials. In this research, the capability of CPTu test for specifying subsurface soil layers and classification of sediments in Urmia Lake is investigated. According to previous studies, the sediments of Urmia Lake are commonly fine grained and soft deposits with organic materials. To e...

One of the main hydraulic properties unsaturated soils is Soil-Water Characteristic Curve (SWCC). It essential to understand, predict soil water storage and determine mechanical behaviour soils. These curves can be obtained by direct indirect measurements. The measurements obtain these are expensive, delicate perform really slow for fine soils, so predictive models become necessary. In order ma...

in this study we report the rock magnetic properties of surface soil samples and their spatialvariability from the northernmost district of kerala to understand pedogenic processes and soil erosion. themagnetic signal is mainly from fine grained pedogenic magnetite as other sources like anthropogenic andlithogenic magnetite, bacterial magnetite and greigite are absent. the surface soil samples ...

Differences in root foraging behavior between species have been well documented, but the effects of these differences on belowground competitive ability are only beginning to be studied. Here we report the results of a competition experiment in homogeneous and heterogeneous soils between two species that differ in their ability to acquire nutrients from patchy environments. The perennial grasse...

Soil erosion by water causes the loss of soil mineral particles and organic carbon (SOC). For determining effectiveness conservation measures on arable land, rainfall simulations are regularly carried out in field trials Czech Republic. The objective this study was to analyse a dataset from 82 bare fallow soils, containing information slope inclination, texture, bulk density, SOC, with respect ...