The surface soil samples

This study aimed to investigate the levels of contamination of potentially toxic trace elements in the soil of Dong Nai Province, Vietnam. To achieve this, the Instrument Neutron Activation Analysis (INAA) method was employed to measure the concentrations of five potentially toxic trace elements, including manganese (Mn), arsenic (As), chromium (Cr), antimony (Sb), and zinc (Zn), across 30 soil samples collected from the region.

11p visergeyne 18-06-2024 1 0   Download

Part 1 of ebook "Water in road structures: Movement, drainage and effects" provides readers with content including: water flow theory for saturated and unsaturated pavement material; measurement techniques for water flow; heat transfer in soils; water in the pavement surfacing; sources and fate of water contaminants in roads; contaminant sampling and analysis; water influence on bearing capacity and pavement performance: field observations;...

264p dieptieuung 19-07-2023 2 2   Download

Spatially resolved optically stimulated luminescence (OSL) offers a means for rapid assessment of dose distributions in retrospective dosimetry and geochronology. Until recently, OSL imaging systems have largely been restricted to measurements of millimetre scale samples; this approach is not well suited for applications where the physical process of interest operates on centimetre scale (e.g., depth dependent trap eviction in exposed rocks, sediment mixing in soils, attenuation of gamma radiation, etc.).

11p vironald 15-12-2022 13 3   Download

We examined the soil fauna community composition and structure of Poyang Lake beach wetlands using the modified Tullgren and Baermann methods during September and December 2015. A total of 3755 individuals were obtained from 2 samplings, which were found to belong to 7 classes, 8 orders, 3 suborders, and 17 families. Among these, the Oribatida, Prostigmata, Nematoda, and Onychiuridae were dominant. The functional groups of soil animals included omnivores, saprozoics, predators, and phytophages.

9p dolomite36 30-12-2021 10 0   Download

An alternative rapid digestion method has been developed for the determination of tungsten (W) in soil samples using fractionation studies and response surface methodology. The digestion method using the Kjeldahl instrument was applied to samples, and soluble tungsten was determined via inductively coupled plasma mass spectrometry. Digestion parameters were selected depending on the results of fractionation studies and optimized using a four-factor and five-level central composite design.

16p langthannam 29-12-2021 15 0   Download

The radioactivity concentration of Cs-137 was determined in 826 soil samples collected from Hai Phong, Quang Ninh, and Lang Son. The residual levels of Cs-137 have also been assessed and compared with previous publications to obtain a trend in Cs-137 in the surface soil.

5p princessmononoke 29-11-2021 11 1   Download

The investigation was conducted in 2018-19 at Jobat Tehsil, District Alirajpur, to know the soil reaction, electrical conductivity, organic carbon content and status of primary nutrients. Surface soil samples were collected grid wise by using cadastral map of the study area and were analyzed for their fertility status.

10p chauchaungayxua10 18-03-2021 15 1   Download

The Knowledge of spatial-variability is critical for site specific nutrient management in soil fertility. Soil sample (149) were gotten from surface from 10 selected sites for preparing precise digital maps using point, line and polygon tools of the GIS (TNTmips 2010) software. Soil spatial variability typically defines variation in soil properties in surface soil such as fertility, pH, EC, soil organic carbon (OC), free CaCO3, mineralizable N,P2O5, K2O and S.

10p chauchaungayxua11 23-03-2021 11 2   Download

A study was conducted during April 2016 to assess the different physical and chemical properties of the soil of Kaipad tracts. The Kaipad tracts, characterized by the unique saline hydromorphic soil covers the north Malabar districts of Kozhikode, Kannur and Kasaragod. As a part of the investigation, representative surface soil samples were collected from 15 selected locations of Kaipad areas comprising of Muttil and Cherukunnu (Fig. 1) panchayath during the first week of April 2016 to assess the different physical and chemical properties.

12p cothumenhmong9 18-01-2021 12 1   Download

Soil pH, EC and Organic Carbon are the essential parameters used as the primary level health status of the soils. In this context, detailed study over soil pH, EC and OC was done for different panchayats of Sabour block of Bhagalpur district. 80 composite surface soil samples (0-15cm) using GPS receiver from different location of fourteen Panchayats of Sabour block were collected during the months of May and June, 2019.

8p trinhthamhodang1216 19-11-2020 18 2   Download

Soil samples were collected from different villages of Majhwa Block of Mirzapur district. The results showed that the available N, P, K and S content in surface (0-20 cm) soils was higher as compared to sub surface (20-40 cm).

8p caygaocaolon8 07-11-2020 10 1   Download

A laboratory study was undertaken to investigate the P adsorption behavior of three representative soils of Chhattisgarh belonging to the order Inceptisol, Alfisol and Vertisol.

6p angicungduoc8 07-11-2020 13 1   Download

An investigation was carried out to study the soil physico-chemical properties of the sweet orange orchards in YSR district of Andhra Pradesh. To prosecute this investigation, fifty sweet orange orchards aged between 12 to 13 years were selected and soil samples were collected from these orchards at 0-30 cm and 30-60 cm depth. Soil reaction of study area varied widely. Majority of the surface soils samples (72%) were mildly alkaline, but at 30-60 cm depth 48% were strongly alkaline, 38% were moderately alkaline and 14% were mildly alkaline in pH. All the orchards were non-saline in nature.

9p nguathienthan8 20-10-2020 12 2   Download

A study was conducted to evaluate the fertility status of soils of five different villages of Lahowal block of Dibrugarh district, Assam, India. A total of 100 numbers of surface soil samples (0-15 cm depth), comprising of 20 composite soil samples from each site, were collected.

13p caygaocaolon7 18-09-2020 8 1   Download

The surface (0-15 cm) soil samples were used for analyzing the soil properties. The soil properties were determined using soil analytical methods given by Jackson (1973). Organic carbon content determined by wet digestion method of Walkley and Black, available nitrogen (N) by Kjeldahl’s method, available phosphorous (P) by Bray and Kurtz method and available potassium (K) by flame photometric method. The data collected on various parameters have been statistically analysed as per the method of Panse and Sukhatme (1978).

4p kethamoi7 26-08-2020 14 1   Download

GPS based total 150 surface soil samples (0-15 cm) were collected from each block (30 samples) (namely; Mungaoli, Chanderi, Ishagarh, Ashoknagar and Sadora) of Ashok Nagar district. The samples were prepared and analyzed for different soil properties viz: soil texture (sand silt and clay), pH, EC, soil organic carbon (SOC), Calcium carbonate different forms of potassium (i.e., water soluble, exchangeable, non- exchangeable lattice and total-K) used standard laboratory method.

12p nguaconbaynhay7 15-08-2020 13 1   Download

Study was conducted to evaluate soil fertility status in the four different tasar growing regions in Banka District of Bihar and Dumka District of Jharkhand. A total of 75 surface soil samples (0-30 cm) were collected from the fields of primary tasar food plants (Terminalia arjuna and T. tomentosa) along with the details regarding farmer’s name, land type, fertilizer details, geo location, etc. The collected samples were air dried, sieved and analyzed for various soil fertility parameters such as pH, EC, organic carbon, macro and micro nutrients etc.

9p angicungduoc6 20-07-2020 13 1   Download

Earthworm diversity and distribution patterns are generally governed by a variety of biotic and abiotic factors such as soil properties, surface litter, vegetation type and, land use pattern, local or regional climate and anthropogenic activities. In the present study we have analysed the earthworm diversity and soil analysis of Chittur, Palakkad, Kerala and Kanuvai, Coimbatore, Tamil Nadu.

7p angicungduoc6 20-07-2020 11 1   Download

The study was conducted to know the soil fertility status of different cropping systems in hill zone acid soils of Karnataka. In each cropping systems, samples were collected from two depths (0-15 cm and 15-30 cm) at 20 locations randomly. Soil characterization revealed that soils were slightly acidic to moderately acidic in range with low soluble salts. Surface soils under paddy cropping system recorded higher exchangeable Al3+ and exchangeable acidity compared to coffee and areca cropping system.

9p kethamoi6 29-06-2020 16 2   Download

An attempt has been made to explore different types of algae from Panikhaiti area of Guwahati, Assam using Winogradsky column. In order to prepare Winogradsy column, soil and water samples were collected from different locations. A transparent, clear plastic bottle was taken and filled with 500g of soil and over layered with 500ml of water sample. The columns were enriched with different carbon and nitrogen supplements. They were covered with plastic sheets and few holes were punctured on them. These were incubated at room temperature (±28°C) in presence of sunlight.

10p chauchaungayxua6 26-06-2020 9 1   Download