scholarly journals Site-Catchment Study of Kislovodsk Depression

Author(s):  
Дмитрий Коробов ◽  
Dmitriy Korobov

The publication focuses on 2018 findings of a comprehensive soil-archaeological survey of the multi-temporal settlements catchment within Kislovodsk Depression. The most in-depth study was conducted in the vicinity of Podkumskoye 3 fortification (5th — 8th centuries AD), where 100 soil sections were laid along a regular network with 50 m step at different distances from the habitat zone. In the soil sections, archaeological material was recorded layer by layer, the description of soil profiles and sampling for chemical and microbiological tests were carried out. The samples were tested for active microbial biomass, urease activity, saprotrophs, magnetic susceptibility and phosphates. This paper deals only with the findings of ceramics as a marker of farming practiced by ancient and medieval people living in this site. In total, about 2,380 fragments of pottery with a total weight of about 9 kg were discovered. A preliminary analysis of the spatial distribution of ceramics was carried out using the geostatistical module of ArcGIS software. It clearly showed different areas of farming in the Koban and Early Alanian areas. Now, the team is working on the analysis of the obtained material and soil samples for the detailed reconstruction of the site catchment in terms of farming.

PeerJ ◽  
2019 ◽  
Vol 7 ◽  
pp. e7880 ◽  
Author(s):  
Wenxiang Zhou ◽  
Guilin Han ◽  
Man Liu ◽  
Xiaoqiang Li

Soil carbon and nitrogen are essential factors for agricultural production and climate changes. A total of 106 soil samples from three agricultural lands (including two rice fields and one sugarcane field) and four non-agricultural lands (including two forest lands, one wasteland and one built-up land) in the Mun River Basin were collected to determine soil carbon, nitrogen, soil pH, soil particle sizes and explore the influence of pH and soil texture on soil C and N. The results show that total organic carbon (TOC) and nitrogen (TON) contents in topsoil (TOC: 2.78 ~ 18.83 g kg−1; TON: 0.48 ~ 2.05 g kg−1) are much higher than those in deep soil (TOC: 0.35 ~ 6.08 g kg−1; TON: <0.99 g kg−1). In topsoil, their contents of forest lands and croplands (TOC: average 15.37 g kg−1; TON: average 1.29 g kg−1) are higher than those of other land uses (TOC: average 5.28 g kg−1; TON: average 0.38 g kg−1). The pH values range from 4.2 to 6.1 in topsoil, and with increase in soil depth, they tend to increase and then decrease. Soil carbon, nitrogen and the C/N (TC/TN ratio) are negatively correlated with soil pH, demonstrating that relatively low pH benefits the accumulation of organic matter. Most soil samples are considered as sandy loam and silt loam from the percentages of clay, silt and sand. For soil profiles below 50 cm, the TOC and TON average contents of soil samples which contain more clay and silt are higher than those of other soil samples.


Forests ◽  
2020 ◽  
Vol 11 (5) ◽  
pp. 532 ◽  
Author(s):  
Wenxiang Zhou ◽  
Guilin Han ◽  
Man Liu ◽  
Jie Zeng ◽  
Bin Liang ◽  
...  

The profile distributions of soil organic carbon (SOC), soil organic nitrogen (SON), soil pH and soil texture were rarely investigated in the Lancangjiang River Basin. This study aims to present the vertical distributions of these soil properties and provide some insights about how they interact with each other in the two typical soil profiles. A total of 56 soil samples were collected from two soil profiles (LCJ S-1, LCJ S-2) in the Lancangjiang River Basin to analyze the profile distributions of SOC and SON and to determine the effects of soil pH and soil texture. Generally, the contents of SOC and SON decreased with increasing soil depth and SOC contents were higher than SON contents (average SOC vs. SON content: 3.87 g kg−1 vs. 1.92 g kg−1 in LCJ S-1 and 5.19 g kg−1 vs. 0.96 g kg−1 in LCJ S-2). Soil pH ranged from 4.50 to 5.74 in the two soil profiles and generally increased with increasing soil depth. According to the percentages of clay, silt, and sand, most soil samples can be categorized as silty loam. Soil pH values were negatively correlated with C/N ratios (r = −0.66, p < 0.01) and SOC contents (r = −0.52, p < 0.01). Clay contents were positively correlated with C/N ratios (r = 0.43, p < 0.05) and SOC contents (r = 0.42, p < 0.01). The results indicate that soil pH and clay are essential factors influencing the SOC spatial distributions in the two soil profiles.


2011 ◽  
Vol 474-476 ◽  
pp. 172-177 ◽  
Author(s):  
Jing Yong Liu ◽  
Xun An Ning

The soil samples in a profile were collected around the pyrite slag pile site near a sulfuric acid plant in Guangdong province and the contents of lead were investigated detail. At the same time, the mechanism of lead pollution was principium analyzed. The research found that the lead pollutants were mainly concentrated in soils surface layer about 0-10cm and shown characteristics of contents rapidly decreasing along the uprights. the main factors that affected the transference of lead from the slag to the soil were the filtering by acid rain and itself acidification of the slag. Iron oxide colloid and organic matter may have been responsible for the lead retention in soil.<b></b>


Author(s):  
Rajendra Hegde ◽  
M. B. Mahendra Kumar ◽  
K. V. Niranjana ◽  
K. V. Seema ◽  
B. A. Dhanorkar

Aims: The detailed survey of the microwatershed was carried out by using digitized cadastral map as a base. The objective of the investigation was undertaken to characterize and classify the soils of Harve-1 microwatershed of Chamarajanagar district, Karnataka. Place and Duration of Study: soil survey was done and soil samples were collected from Harve-1 microwatershed of Chamarajanagar district in the year 2016. The laboratory characterization and soil classification work was done at National Bureau of soil survey and land use planning, Regional centre Hebbal, Bangalore, Karnataka. Methodology: Using Cartosat-1 and LISS-IV merged satellite data at the scale of 1:7920 were used in conjunction with the cadastral map as a base. Soil profiles were exposed and location of soil profiles was recorded using GPS and studied from each landform for describing morphological characteristic as per the guidelines given in USDA soil survey manual (Soil Survey Staff 2014). Based on the soil-site characteristics, ten soil series were identified using the method employed by Reddy (2006). Horizon wise soil samples were collected, processed and analysed for various properties by adopting standard procedure. Results: The study showed that, the soils were moderately shallow to moderately deep in depth. The colour of the soils varied from dark red to dark reddish brown. Texture of the soil varied from sandy loam to sandy clay loam in surface and sandy clay loam to sandy clay in subsurface. The structure was weak medium sub-angular blocky to moderate medium sub-angular blocky throughout the profile in all series. The consistency of majority of the soils were friable, slightly sticky and slightly plastic in surface and friable, moderately sticky and moderately plastic in subsurface. Soil reaction varied from slightly acidic to alkaline (5.70 to 8.18) in nature. Organic carbon content of the soils was low to high (0.20 to 1.24 per cent). Calcium and magnesium are dominant exchangeable cations followed by sodium and potassium. The CEC of the soils ranged from 3.17 to 25.76 cmol (p+) kg-1. Major proportion of soil series in the microwatershed belonged to the order of Alfisols (Paralitic Rhodustalfs, Typic Rhodustalfs, Typic Haplustalfs and Rhodic Paleustalfs) except Honnenahalli (HNH) series belong to the order of Inceptisols (Typic Haplustepts). Conclusion: The soils of the microwatershed were comes under the order of alfisols and inceptisols. This generated information can help the researchers, farmers and planners to manage the natural resources for future planning and also to achieve sustainable productivity.


Soil Research ◽  
1988 ◽  
Vol 26 (2) ◽  
pp. 243 ◽  
Author(s):  
G Atkinson

The techniques of cluster analysis and principal component analysis (PCA) were applied to soils data from two Pleistocene alluvial terraces on the Nepean River, N.S.W., the Clarendon and Cranebrook Formations, to address issues raised in the literature regarding their stratigraphic relationships. A total of 160 profiles were sampled at four fixed depths to 1 8 m. Profiles were located in four 1000 by 400 m sample areas, two on each terrace. Soil samples were analysed for colour, pH, and 2.8 M HCl extractable Fe2+, Mn2+, Na2+, K+, Ca2+ and Mg2+. Data were analysed by using whole profiles as the soil entities. One branch of the dendrogram resulting from the cluster analysis contained soil profiles exclusively from sample areas on the Cranebrook Formation, whilst the other branch contained profiles exclusively from sample areas on the Clarendon Formation. Soils typical of the Lowlands Formation, Londonderry Clay and minor subdivisions within the terraces could be distinguished on the dendrogram. Similar subdivisions could also be observed on a PCA scattergram. The Clarendon and Cranebrook Formations are complex units which contain minor terrace features. Each has a distinctly different suite of soils which is consistent with their continued designation as separate stratigraphic units. The Lowlands Formation can be separated from the Cranebrook Formation upstream of Castlereagh and the Clarendon Formation should have its southern boundary to the Londonderry Clay moved north towards Richmond and its stratigraphy redefined.


2017 ◽  
Vol 4 (2) ◽  
pp. 106-113
Author(s):  
Edison Parulian Sihombing Sihombing

Charges against oil palm plantations as the cause of soil degradation and as a ringleader ofenvironmental damage, drought land and take nutrients in large quantities make this studyimportant. The purpose of this study to determine the effect of oil palm cultivation on the four-generation of sustainable planting to changes in soil physical characteristics Typic hapludults. Description of soil profiles and sampling was conducted at four sites representinggenerations of planting oil palm. As the control mixed crop that has not been planted with oilpalm. Soil samples tested in the laboratory for each of the characteristics of soil physics.Results showed oil palm cultivation in soil Typic hapludults for four generations of plantscontinuously unchanged physical characteristics significant level. This shows that thecultivation of oil palm trees in a sustainable manner with the best management practicesystems PT Socfindo can maintain the physical characteristics of the soil.


Author(s):  
Virginia Moore ◽  
Shawn Marceaux

On behalf of Oden Hughes, Pape-Dawson conducted an intensive archaeological survey of the proposed NWC Bulverde/1604 Sewer Extension Project in San Antonio, Bexar County, Texas. The project proposed to begin on the southwest side of Classen Road approximately 0.2 kilometers (km) (0.13 mile [mi]) east of its northern intersection with Bulverde Road. The proposed line would parallel Elm Waterhole Creek to the west and south approximately 0.8 km (0.5 mi). At this point, the line would cross Autry Pond Road in a southwestern direction eventually paralleling Bulverde Road to the intersection of Redland Road for a total length of approximately 0.4 km (0.25 mi). This project would entail the installation of 1.2 km (0.75 mi) of new sewer line within a 5-meter (m) (16-foot [ft])-wide permanent easement and an adjacent 8-m (25-ft)-wide temporary easement along whichever side was available. The Area of Potential Effects (APE) for the proposed project was defined as a 30 m (100 ft) buffer centered on the proposed SAWS centerline totaling 3.7 hectares (ha) (9.18 acres). The depth of vertical impacts was not yet been determined, but utility installations typically require 1.8 to 2.4 m (6 to 8 ft). Notably, the sewer alignment was changed after completion of this archaeological survey and installation will no longer take place in this APE. The survey for the new alignment was completed under Texas Antiquities Permit #8870. Although Oden Hughes would construct the new sewer line, San Antonio Water Systems (SAWS) would be the grantee of the easement after construction. For this reason, compliance with the Antiquities Code of Texas (ACT) was required. In addition, this project would require a Nationwide Permit from the U.S. Army Corps of Engineers (USACE). Thus, compliance with Section 106 of the National Historic Preservation Act (NHPA) (Title 36 Code of Federal Regulations Part 800.4 [36 CFR 800.4]) was required. In addition, the project was located within the San Antonio city limits, which necessitated compliance with the Historic Preservation and Urban Design Section of the City of San Antonio (COSA) Unified Development Code (UDC). Pape-Dawson conducted the intensive archaeological survey on September 20, 2017. The entirety of the APE was subject to visual inspection supplemented by judgmentally placed shovel tests in order to evaluate the potential for buried cultural resources. This work was conducted under Antiquities Permit No. 8161 with Virginia Moore, M.A.G. serving as Principal Investigator. A total of 16 shovel tests was excavated within the APE, all of which were negative for archaeological material. During this survey, one previously recorded site (41BX1786) was revisited within the limits of the APE. However, no cultural deposits associated with the site were encountered. Given the absence of artifacts observed during the current survey, Pape-Dawson recommends that 41BX1786 is ineligible within ROW for State Antiquities Landmark (SAL) and National Register of Historic Places (NRHP) designation. No archaeological resources were located or recorded during this survey. As no properties were identified that meet the criteria for listing in the National Register of Historic Places (NRHP) according to 36 CFR 60.4, or for designation as a State Antiquities Landmark (SAL) according to 13 Texas Administrative Code 26.12 (13 TAC 26.12), Pape-Dawson recommends that no further archaeological work is necessary for the proposed undertaking as presently designed. However, if undiscovered cultural material is encountered iii during construction, it is recommended that all work in the vicinity should cease and the THC and COSA archaeologists be contacted to ensure compliance with the NHPA, ACT, and UDC. No artifacts were collected, but all project records and photographs will be curated at the Center for Archaeological Research (CAR) at the University of Texas at San Antonio.


2017 ◽  
Vol 9 (1) ◽  
pp. 20-31 ◽  
Author(s):  
B. H. Prasetyo

Vertisols is black and fertile soils, derived from various parent materials, dominated by smectite clay minerals, and charasterize by crack formation during dry season. Six soil profiles consisted of thirty two soil samples from dIfferent location were analyzed for their chemical and mineralogical composition at the laboratories of Soil Research Center for soil characteristics. Results indicate that the color matrix of Vertisols varies, hue range from 2.5Y to 10YR, color value varies from 2 to 6, and chroma range from 0 to 4. Clay mineral composition of Vertisols is dominated by smectite. Other clay minerals founded in the Vertisols are kaolinite, illite and vermiculite. The mineralogy composition of sand fraction is varies, some of them rich in weatherable minerals like andesine, amfibole, orthoclase, sanidin and the others are dominated by resistant minerals such as quartz and opaque. The mineralogical composition of Vertisols dependent on their parent material. The dominant cations in Vertisols are Ca++ and Mg++. Vertisols from volcanic materials is dominated by Ca++ and followed by Mg++ cations, Vertisols from limestone is dominated by Ca++, while Vertisols from peridotite is dominated by Mg++. All of the Vertisols studied have a high cation exchange capacity with pH’s range from 5.5 to 7.4. In using Vertisols for food plantation, should be consider the high content of Ca++, Mg++ and the water management. The soils should be atleast always in moist condition, otherwise soils become very hard and cracks when dry.


Author(s):  
Diego Ferreira de Souza ◽  
Ronny Sobreira Barbosa ◽  
Yuri Jacques Agra Bezerra da Silva ◽  
Márcio Cleto Soares de Moura ◽  
Romário Porto de Oliveira ◽  
...  

This study characterized the morphological, physical and chemical attributes of sandstone-derived soils at the Cerrado of the Piauí State, Brazil, in order to identify evolutionary standards. The study was carried out with five representative soil profiles identified as P1-RY (Typical Flavic Psychotic Neosol - Aquents), P2-PA (Typical Dystrophic Yellow Argisol - Alfisol), P3-RL (Fragmentary Litholic Distrophic Neosol - Psammenit), P4-RQ (Typical Ortic Quartzenetic Neosol - Orthents) and P5-PV (Typical Dystrophic Red Argisol - Ultisol). Soil samples were submitted laboratory analysis described morphologically. In general, the soils presented high sand content, low pH, low content of exchangeable bases and low cation exchange capacity (CEC). Organic matter governed the CEC in most cases, suggesting dependence of organic matter in the supply of charges. These soils showed a low degree of weathering, but with iron of high crystallinity. Thus, the relief and the parent material are the major important soil-forming factors at the Cerrado of the Piauí State. Moreover, these soils are young, with the soils from the Piauí Formation being more evolved. However, the sandstones from the Canindé Group apparently are providing lithological secondary minerals for the soil.


1992 ◽  
Vol 72 (4) ◽  
pp. 429-439 ◽  
Author(s):  
E. De Jong ◽  
L. M. Kozak ◽  
H. B. Storehouse

Shrink-swell indices for 27 soil samples (representing the major horizons of eight soil profiles) were determined and related to soil texture, organic and inorganic C content, and specific surface area. The coefficient of linear extension was measured from saturation and from 33 kPa matric suction to oven-dryness on undisturbed clods (COLEclod) and on remolded samples of the less than 2-mm fraction (COLErod); the Atterberg limits were determined on the less than 0.4-mm fraction. COLEclod, COLErod and the plasticity index were highly correlated with each other and with clay content and surface area, but not with organic or inorganic C. The extent of the shrinkage was significantly (P > 0.01) related to the water content at the start of the shrinkage test; this relationship was clearer for the remolded than the undisturbed samples, possibly due to the structure of the clods. Key words: Coefficient of linear extension, plasticity index, clods vs. remolded, texture, organic carbon


Sign in / Sign up

Export Citation Format

Share Document