نتایج جستجو برای: clay mineralogy
تعداد نتایج: 25684 فیلتر نتایج به سال:
In this study, the spectral responses obtained from a Typic Red Hapludox (oxisol) were analyzed under different uses and occupations: Ficus elastica cultivation, Citrus + Arachis association cultivation, transitional crops, forest, Mangifera indica, Anacardium occidentale, Elaeis guineensis (18 years), Brachiaria decumbens, Brachiaria brizantha, and Musa × paradisiaca + Zea mays at the La Liber...
In this paper, there was studied correlation of dielectric predictions for moist soils with the measured values, regarding the well known and prevalent in common usage semiempirical mixing dielectric model (SMDM) proposed by M. C. Dobson et al., on the one hand, and the generalized refractive mixing dielectric model (GRMDM) proposed by V. L. Mironov et al., on the other hand. The analysis is ba...
759 Soil water content (θ, m3 m−3) is a basic hydrologic parameter that affects groundwater recharge, surface water fl ow, transpiration, and carbon fi xation. Electronic monitoring of θ facilitates the study of those processes by providing detailed temporal data. Most instruments currently in use measure soil dielectric permittivity, directly or indirectly, and then calculate θ with an equatio...
Aspects in Mining & Mineral Science Studies on the Impacts of Excavation Contact Sediments Behaviour Steam Coals René Luhmer1, Manuela Neuroth1* and Helge Stanjek2 1RWE Power AG, Research Development, Plant Technology Storage, Germany 2RWTH Aachen, Institute for Clay Interface Mineralogy, *Corresponding author: Neuroth, RWE Werkstraße, 50129 Bergheim, Submission: January 19, 2022;Published: 26,...
Despite the great importance of potassium applied as a fertilizer in the orange orchards, no information is currently available regarding the rate of potassium release from rhizosphere and the bulk soils of such trees. The objectives of this study were to investigate the weathering of micaceous minerals and their non-exchangeable K release and also, to examine the status of different forms of K...
Clay minerals deserve special attention as they play a crucial role in many soils. The clay mineralogy of five gypsiferous soils from different landforms in eastern Isfahan was investigated using X-ray diffraction (XRD). In addition, soil aggregates and wind-deposited sediments were examined by scanning electron microscope (SEM) and analyzed by energy dispersive X-ray analyzer (EDX). The resul...
The Mars Science Laboratory rover Curiosity found host rocks of basaltic composition and alteration assemblages containing clay minerals at Yellowknife Bay, Gale Crater. On the basis of the observed host rock and alteration minerals, we present results of equilibrium thermochemical modeling of the Sheepbed mudstones of Yellowknife Bay in order to constrain the formation conditions of its second...
In the Senegal valley, it is commonly considered that the Acid Sulfate Soils of the delta are fossil soils overlain by more recent sediments, and that the Vertisols, which abruptly overlie a thick sandy horizon, result from a change in the sedimentation mode of the river. However, we show that both soils belong to the same pedological system extending from the delta to the limit of the last mar...
The mineral, organic and elemental composition of medicine clays from three shrines in the Tong Hills in northern Ghana (Gbankil, Kusanaab, and Yaane) are assessed to ascertain what additives they might contain and the implications for their recognition, for example in archaeological contexts. These are clays that are widely used for healing purposes being perceived efficacious in curing multip...
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