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This paper compares the mineralogical and chemical composition, morphology and strength of co-existing matrix, mottles, weak glaebules and strong dense glaebules in some soils from south-western Australia. The mineralogy and morphology of mottles and weak glaebules are very similar to soil matrix, whereas most dense glaebules differ substantially from the soil matrix. These dense glaebules are very...
After the 1995 flooding of the rivers Meuse, Rhine and Waal in the Netherlands, a survey was carried out in which samples were taken of deposited river silt and underlying topsoils from 16 sites in the three river regions. The aim of the survey was to gain an insight into the possible effects of deposited metals on general topsoil quality. Neutron activation analysis was used to determine concentrations...
Ca fertilizers may be used as tools to improve the chemical status of acidic, base poor forest soils. The downward movement of ions after addition of CaCO 3 , CaCO 3 + MgO, and CaS0 4 · 2H 2 O was studied by monitoring the leachate composition from three types of columns — A1/B, mull/A1/B and moder/A1/B — reconstructed from an acid brown forest soil profile. The fertilizers...
The sulfur isotope composition (δ 34 S) of available su lfate was measured for 44 soils developed on volcanic ashes and basaltic terrains in Japan, Hawaii, Australia, New Zealand, Brazil and Chile. Native soil sulfates are a mixture of seaspray (δ34S = +20‰) and anthropogenic (around + 5‰ on average) sulfates. The isotopic values are generally higher in areas of the Southern Hemisphere than...
Aggregates of the EA horizon, the Bhs and the Bs horizons of an Alpine Podzol were separated into core and surface fractions. In the air-dried aggregate fractions CEC, C org , 7 fractions of Al, Cd, Cr, Cu, Fe, Mn, Ni, Pb, Zn using a sequential extraction procedure, and PAHs were determined. Cation exchange capacity, C org and PAHs were determined in homogenized bulk soil samples,...
A toposequence of soils with columnar structure in the Paricarana catchment (Roraima State, north Amazonia) was studied. The soils occur within the driest part of tropical Amazonia. The two soils in the lower positions are magnesic, as well as sodic, displaying columnar structural peds. The upper slope position is calcium-saturated, associated with dry forest, whilst the the Mg/Na affected soils are...
Soil development on steep mountainous topography generally leads to thin and undifferentiated pedons. On talus slopes of the Buckskin Mountains, a fault-blocked range of west-central Nevada, USA, thick, differentiated pedons occur. Talus occurs on the western front where block rotation has formed very steep slopes and consists of angular dacite cobbles and boulders. The study area is arid, averaging...
The depth to permafrost, thickness of the surface organic layer, and strength of redoximorphic features are closely correlated in soils on low-relief bedrock hills and colluvial slopes near Hughes, Alaska. Soils can be arrayed along a morphological gradient from warm-dry-mineral to cold-wet-organic, and the ranks of soils along this gradient correlate with topographic parameters and mineral soil texture...
The World Inventory of Soil Emission Potentials (WISE) database is used to compile a standardized and spatially explicit data set of soil water retention properties. WISE holds 4353 globally distributed profiles considered to be representative of the soil units shown on a 1/2° latitude by 1/2° longitude version of the corrected and digitized 1:5 M FAO-Unesco Soil Map of the World. Pedotransfer functions...
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