Distribution and mobility of radiocesium in relation to the clay fraction mineralogy and soil properties in the Iput River floodplain

2007 ◽  
Vol 40 (10) ◽  
pp. 1062-1075 ◽  
Author(s):  
E. M. Korobova ◽  
N. P. Chizhikova
Keyword(s):  
Soil Properties ◽  
Clay Fraction ◽  
River Floodplain

Soil properties and growth of swamp white oak and pin oak on bedded soils in the lower Missouri River floodplain

2005 ◽  
Vol 204 (2-3) ◽  
pp. 315-327 ◽  
Author(s):  
John M. Kabrick ◽  
Daniel C. Dey ◽  
J.W. Van Sambeek ◽  
Michael Wallendorf ◽  
Michael A. Gold
Keyword(s):  
Soil Properties ◽  
Missouri River ◽  
White Oak ◽  
River Floodplain ◽  
Swamp White Oak

scholarly journals Characterization and classification of some intensively cultivated soils from the Ganges river floodplain of Bangladesh

1970 ◽  
Vol 20 (1) ◽  
pp. 71-80 ◽  
Author(s):  
MM Hossain ◽  
ZH Khan ◽  
MS Hussain ◽  
AR Mazumder
Keyword(s):  
Clay Fraction ◽  
Clay Content ◽  
Ganges River ◽  
Soil Series ◽  
River Floodplain ◽  
Alkaline Reaction ◽  
The Family ◽  
The Ganges

Most of the soil samples from four pedons representing some extensive soil series from the Ganges river floodplain of Bangladesh found to be heavy textured with clay content averaging from 43 to 55 per cent up to a depth of one meter. The soils had neutral to alkaline reaction with high percentage of base saturation. Because of seasonal flooding ranging from two - three months the soils have developed redoximorphic features including redox concentration in the middle zone and a redox depletion in the lower zone of the profiles. The seasonal submergence and drying are the most active factors in developing the morphogenetic features in these soils. Smectite was the dominant clay mineral followed by mica and kaolinite with small quantities of vermiculites and interstratified minerals. The minerals in the clay fraction of the soils appear to be inherited from alluvial parent materials with very little in situ mineral transformation. The soils were characterized at the family categoric level of USDA soil taxonomy.Key words: Ganges river floodplain; Characterization; Classification; Cultivated soilsDOI: http://dx.doi.org/10.3329/dujbs.v20i1.8870Dhaka Univ. J. Biol. Sci. 20(1): 71-80, 2011 (January)

Estimation of water holding capacity of soils using data from different types of particle size analyses

2021 ◽  
Author(s):  
Adrienn Horváth ◽  
András Makó ◽  
András Bidló ◽  
Orsolya Szecsődi
Keyword(s):  
Particle Size ◽  
Soil Properties ◽  
Size Distribution ◽  
Clay Fraction ◽  
Laser Diffraction ◽  
Water Holding Capacity ◽  
Extreme Weather Events ◽  
Sedimentation Method ◽  
Pre Treatment ◽  
Water Holding

<p>Determining the particle size distribution of soils helps to monitor the hydrophysical properties of the soil (e.g. water conductivity or water holding capacity). Climate change increases the importance of water retention and permeability, as extreme weather events can severely impair the water supply of drought-prone plant stocks. The amount of water is expected to decrease. At the beginning of the research, we have developed a measurement method to replace the classical “pipette” sedimentation method with the laser diffraction method. The theoretical background of laser diffraction measurements is already known, but its practical application for estimating soil’s water holding capacity is uncommon in detail. The developed, modified Thornthwaite model considers soil properties (e.g. root depth, topsoil layer thickness) and size distribution (silt and clay fraction) of soil particles combined with the most significant soil properties. The pre-sieving of soil aggregates, the pre-treatment (disaggregation and dispersion) of the samples greatly influence the obtained results. In addition to the sedimentation method, instrumental measurements (Mastersizer 3000) were applied with three variants of pre-treatment. For comparison, the results of a Leptosol, a Cambisol, and a Luvisol were prepared for the first modified Thornthwaite water balance model. Significant differences appeared especially during drought periods that could be a basis for studying the drought sensitivity of soils. By the development of our method, the water holding capacity of soil can be estimated; therefore, adapting forest management could be planned against climatic and pedological transformations.</p>

scholarly journals Influence of Soil Properties and Composition, and Applied Hydraulic Pressures on Sample Quality of Pusan Clays

2017 ◽  
Vol 2 (1) ◽  
pp. 32
Author(s):  
Ganapathi Rao Konni
Keyword(s):  
Soil Properties ◽  
Minimum Degree ◽  
Critical Role ◽  
Clay Fraction ◽  
Unit Weight ◽  
Hydraulic Pressure ◽  
Contributing Factors ◽  
Sample Quality ◽  
Clay Deposits ◽  
Sample Disturbance

Obtaining  good quality samples from soft marine clay deposits is a challenge and it is being seen that the sample disturbance is inevitable even though lot of research has suggested using more sophisticated samplers, sampling methods, and special care being taken while handling and transportation of the samples. Hence, author doubt that apart from the above, there could also be other parameters playing critical role on the sample quality. Therefore, in the current study, sampling tube geometry is maintained same, especially angle of cutting edge and area ratio which are found to be key influencing factors and hence its impact on the current study is ignored. In the current study in order to assess the other contributing factors behind the additional sample disturbance, a special attention is given to find out other possible parameters that could also influence the sample quality. As a result of this study, it is found that the soil properties such as; silt and sand content in the soil, clay fraction, hydraulic pressure applied to penetrate the sampler, rigidity index of the soil, initial void ratio, plasticity index, and unit weight of the soil also contribute to sample disturbance. Since these properties, except hydraulic pressure, are soil inherent properties, there is always a certain minimum degree of sample disturbance associated with these soil inherent properties depending on the magnitude of these parameters. Unfortunately, the soil properties cannot be changed and thus a minimum sample disturbance is inevitable.    

Reductive solubilization of arsenic in a mining-impacted river floodplain: Influence of soil properties and temperature

2017 ◽  
Vol 231 ◽  
pp. 722-731 ◽  
Author(s):  
Michael Simmler ◽  
Jérôme Bommer ◽  
Sarah Frischknecht ◽  
Iso Christl ◽  
Tsvetan Kotsev ◽  
...  
Keyword(s):  
Soil Properties ◽  
River Floodplain

Sea spray and land use affect clay mineral and soil organic matter properties in soil on machair (Harris, Scotland)

2020 ◽  
Author(s):  
Thilo Rennert ◽  
Ludger Herrmann
Keyword(s):  
Land Use ◽  
Organic Matter ◽  
Soil Organic Matter ◽  
Soil Properties ◽  
Arable Land ◽  
Clay Fraction ◽  
Sea Spray ◽  
Scanning Calorimetry ◽  
X Ray ◽  
Pedogenic Process

<p>‘Machair’ describes a landscape form that is present along the Atlantic seaboard of Scotland and Ireland, and that is characterized by a gently sloping coastal plain developed from aeolian carbonate and quartzose sand. We characterized three grassland soil profiles along a coastal transect on Harris (Outer Hebrides, Scotland) by standard methods (colour, texture, pH, wet-chemical extractions), infrared spectroscopy, X-ray diffractometry, X-ray fluorescence spectrometry and differential scanning calorimetry. Our aim was to understand the impacts of humankind, matter input, weathering and accumulation of soil organic matter (SOM) on chemical processes and soil properties. One of the profiles differed distinctly from the other two, in particular regarding depth, texture, carbonate and SOM contents, and properties of SOM (relative content of rather labile permanganate-oxidizable SOM, transformation state), presumably caused by earlier land use as arable land. We classified the soil with the least depth as Hypereutric Leptosol, and the others as Cambic and Calcaric Phaeozem. Thermally stable SOM was present in all samples, likely pointing to pyrogenic SOM, i.e. black carbon. The mineralogical composition differed among the profiles and reflected the intermediate character of the local rocks. In all topsoil horizons, we identified Mg-hydroxy-interlayered minerals (HIMs), which are rather rare, given the commonly low abundance of Mg ions in the soil solution relative to Ca, or Al in acidic soil. The share of Mg-HIMs of the total minerals in the clay fraction ranged from 25% in a subsoil to 71% in a topsoil horizon. We suggest that sea spray is the source of subsequently intercalated Mg. This composition of the clay fraction, which is possibly typical of soil on certain machair sites, and is the result of a pedogenic process, surely affects soil properties and processes such as cation exchange capacity and SOM storage and thus element cycles.</p>

scholarly journals Tropical Volcanic Soils From Flores Island, Indonesia

2018 ◽  
Vol 15 (1) ◽  
pp. 83
Author(s):  
Hikmatullah Hikmatullah ◽  
Kesumo Nugroho
Keyword(s):  
Soil Properties ◽  
Clay Fraction ◽  
Climatic Conditions ◽  
Parent Material ◽  
Annual Rainfall ◽  
Tropical Region ◽  
Eastern Region ◽  
Volcanic Soils ◽  
Parent Materials ◽  
Tropical Volcanic Soils

Tropical Volcanic Soils from Flores Island, Indonesia (Hikmatullah and K Nugroho): Soils that are developed in tropical region with volcanic parent materials have many unique properties, and high potential for agricultural use. The purpose of this study is to characterize the soils developed on volcanic materials from Flores Island, Indonesia, and to examine if the soils meet the requirements for andic soil properties. Selected five soils profiles developed from andesitic volcanic materials from Flores Island were studied to determine their properties. They were compared in their physical, chemical and mineralogical characteristics according to their parent material, and climatic characteristic different.  The soils were developed under humid tropical climate with ustic to udic soil moisture regimes with different annual rainfall. The soils developed from volcanic ash parent materials in Flores Island showed different properties compared to the soils derived from volcanic tuff, even though they were developed from th e same intermediary volcanic materials. The silica contents, clay mineralogy and sand fractions, were shown as the differences. The different in climatic conditions developed similar properties such as deep solum, dark color, medium texture, and very friable soil consistency. The soils have high organic materials, slightly acid to acid, low to medium cation exchange capacity (CEC). The soils in western region have higher clay content and showing more developed than of the eastern region. All the profiles meet the requirements for andic soil properties, and classified as Andisols order. The composition of sand mineral was dominated by hornblende, augite, and hypersthenes with high weatherable mineral reserves, while the clay fraction was dominated by disordered kaolinite, and hydrated halloysite. The soils were classified into subgroup as Thaptic Hapludands, Typic Hapludands, and Dystric Haplustands.

scholarly journals The Evaluation of the Accuracy of Interpolation Methods in Crafting Maps of Physical and Hydro-Physical Soil Properties

Water ◽  
2021 ◽  
Vol 13 (2) ◽  
pp. 212
Author(s):  
Dušan Igaz ◽  
Karol Šinka ◽  
Peter Varga ◽  
Gréta Vrbičanová ◽  
Elena Aydın ◽  
...  
Keyword(s):  
Soil Properties ◽  
Interpolation Method ◽  
Clay Fraction ◽  
Field Research ◽  
Organic Carbon Content ◽  
Spline Method ◽  
Interpolation Methods ◽  
Distance Weighting ◽  
Mutual Comparison ◽  
Gis Environment

The goal of this study was the spatial processing and showcasing selected soil properties (available water capacity, total organic carbon content and the content of clay fraction <0.001 mm) in the Nitra River Basin (Slovakia) via the usage and the subsequent evaluation of the quality of applied interpolation methods (Spline, inverse distance weighting (IDW), Topo to Raster). The results showed the possibilities of “conversion” of point information obtained by field research as well as research in the laboratory into a spatial expression, thus providing at least relevant estimation of the soil properties even in localities not directly covered by soil sampling. Based on the evaluation and mutual comparison of the accuracy of the used interpolation methods (by using the so-called cross-validation and trust criteria), the most favorable results were achieved by the Spline method in the GRASS GIS environment, and in the ArcGIS environment. When comparing the measured and estimated values of given soil properties at control points, the interpolated values classified as very accurate up to accurate prevailed in the verification dataset. Qualitatively less favorable (but still acceptable) were the results obtained with Topo to Raster (ArcGIS) interpolation method. On the contrary, the Spline method in the ArcGIS environment turned out to be the least accurate. We assume that this is most likely not only a consequence of insufficient density of points (resources), but also an inappropriate implementation of the method into the ArcGIS environment.

scholarly journals Potassium release Characteristics in Relation to Soil Properties in Soils of Major Cropping Systems in Kurnool District

Agropedology ◽  
2019 ◽  
Vol 27 (1) ◽  
Author(s):  
I. Rajeevana ◽  
◽  
P. Kavitha ◽  
M. Sreenivasa Chari ◽  
M. Srinivasa Reddy ◽  
...  
Keyword(s):  
Soil Properties ◽  
Andhra Pradesh ◽  
Surface Soil ◽  
Cropping Systems ◽  
Clay Fraction ◽  
Cropping System ◽  
Sand Fraction ◽  
Potassium Release ◽  
Coarse To Fine ◽  
Exchangeable Form

Sixty representative surface soil samples (0-15 cm) were collected from 5 major cropping systems (rice-rice, fallow-bengal gram, groundnut-groundnut, maize-maize, rice-maize/mustard) covering 13 mandals in Kurnool district of Andhra Pradesh. Based on K status, the potassium releasing characteristics of thirty soils were studied by repeated extractions with boiling 1N HNO3 and their relationship between soil properties and different forms of potassium. The soils were moderately coarse to fine in texture and neutral to slightly alkaline, non-saline and non-calcareous. Potassium release characteristics and different forms of potassium were highest in maize-maize cropping system and the lowest in groundnut-groundnut cropping system. Most of the soils had lower step-K and cumulative-K. The K release parameters were positively and significantly correlated with non-exchangeable form of soil K, pH, OC, CEC and clay fraction of soil and negatively correlated with sand fraction of soil.

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