scholarly journals Characterization and Formation of Salt affected Soils in Eastern Rajasthan Upland

Agropedology ◽  
2019 ◽  
Vol 26 (2) ◽  
Author(s):  
S.S. Sharma ◽  
◽  
R.P. Sharma ◽  
R.S. Singh ◽  
S. K. Singh ◽  
...  
Keyword(s):  
Underground Water ◽  
Sodium Adsorption Ratio ◽  
Soil Reaction ◽  
Sodic Soils ◽  
Mean Values ◽  
Physico Chemical ◽  
Increasing Trend ◽  
Problematic Soils ◽  
The Mean ◽  
Salt Affected Soils

Soils of the Bhilwara district are affected with different degree and extent of soluble salts. These soils are distributed in hot semi-arid agro-ecological sub region of Rajasthan. It is located between 25o 01' to 25o 58' N latitude and 74o 01' to 75o28' E longitude at an elevation between 380 and 500 meters above the mean sea level. The physico-chemical analysis of soils revealed the dominant cations such as sodium followed by calcium. Exchangeable sodium percentage was ranged 23.1 to 54.6, 17 to 38.5 and 7.1 to 20.0 in saline, sodic and saline-sodic soils, respectively. The Sodium Adsorption Ratio varied from 2.5 to 16.8, 3.2 to 9.4 and 3.8 to 12.6 in these problematic soils, respectively. Soil reaction was ranged from 7.6 to 8.4, 8.5 to 9.3 and 8.5 to 8.8 whereas electrical conductivity of saturation extract varied from 14.4 to 25.2, 1.0 to 5.6 and 2.4 to 13.6 dSm-1 in saline, sodic and saline-sodic soils, respectively. Area under saline and saline-sodic soils was moderately-well to well drained whereas sodic soils were imperfectly drained. Accumulation of calcium carbonate showed increasing trend with depth of profile in all three soils. Mean values of adjusted sodium adsorption ratio of irrigation water was 43.55, 41.88 and 36.74 for saline, saline-sodic and sodic soils. Use of low quality underground water for irrigation, aggravated the process of formation of the salt affected soils in eastern Rajasthan Uplands.

scholarly journals Physico-chemical trends in the sediments of Agbede Wetlands, Nigeria

2017 ◽  
Vol 64 (2) ◽  
pp. 111-126
Author(s):  
Abdul-Rahman Dirisu ◽  
John Ovie Olomukoro ◽  
Ifeanyi Maxwell Ezenwa
Keyword(s):  
Alkali Metals ◽  
Anthropogenic Activities ◽  
Sediment Quality ◽  
Principal Component ◽  
Mean Values ◽  
Physico Chemical ◽  
Lotic System ◽  
The Mean ◽  
And Cluster Analysis ◽  
Chemical Trends

AbstractThis study assessed the physico-chemical status of sediments in the Agbede Wetlands with the aim to create a reference archive for the Edo North catchment and to further identify the characteristics mostly influenced by the natural and anthropogenic activities going on at the watershed. Nutrients, zinc, nickel and lead were identified to be mostly of anthropogenic origin, while alkali metals and alkaline earth metals were from both anthropogenic and natural sources. The clustering of stations 1 and 4 indicates that the sediment quality in the lentic systems was not completely excluded from the lotic system, suggesting that principal component analysis (PCA) and cluster analysis (CA) techniques are invaluable tools for identifying factors influencing the sediment quality. The mean values of the particle size distribution were in the following order across the ecosystems: sand (61.86–80.53%) > silt (9.75–30.34%) > clay (7.83–13.89%). The contamination of the water bodies was primarily derived from agricultural run-offs and through geochemical weathering of the top soils. Therefore, our analysis indicates that the concentrations of cations, anions and nutrients in the sediments of the lotic and lentic ecosystems in Agbede Wetlands are not at an alarming level.

scholarly journals Ecology of Cyprinus carpio var. specularis (Physico-Chemical Conditions of the Habitat)

2013 ◽  
Vol 9 (1-2) ◽  
pp. 133-139 ◽  
Author(s):  
MR Manon ◽  
MD Hossain
Keyword(s):  
Water Temperature ◽  
Air Temperature ◽  
Cyprinus Carpio ◽  
Flood Plain ◽  
Water Transparency ◽  
Mean Values ◽  
Physico Chemical ◽  
River Flood ◽  
The Mean ◽  
Chemical Conditions

The study was carried out from November 2010 to August 2011. The study was conducted on the Atrai river, a flood plain and a culturable pond of Naogaon district for the find out of ecology of Cyprinus carpio var. specularis. The mean values of air temperature of Atrai river, flood plain and pond was 28.17. The mean values of water temperature of Atrai river, flood plain and pond was 26.39, 26.61 and 25.81°C, respectively. The mean values of water transparency of Atrai river, flood plain and pond was 57.25, 47.20 and 41.32cm, respectively. The mean values of rainfall of Atrai river, flood plain and pond was 121.19. The mean values of pH of Atrai river, flood plain and pond was 8.03, 7.91 and 7.73, respectively. The mean values of DO of Atrai river, flood plain and pond was 5.99, 6.43 and 5.93 mg/l, respectively. The mean values of CO2 of Atrai river, flood plain and pond was 6.87, 6.87 and 6.77 mg/l, respectively. DOI: http://dx.doi.org/10.3329/jsf.v9i1-2.14656 J. Sci. Foundation, 9(1&2): 133-139, June-December 2011

Spatial Variability of Sodium Adsorption Ratio and Sodicity in Salt-Affected Soils of Northeast Thailand

2014 ◽  
Vol 931-932 ◽  
pp. 709-715 ◽  
Author(s):  
Porntip Phontusang ◽  
Roengsak Katawatin ◽  
Krirk Pannangpetch ◽  
Sununtha Kingpaiboon ◽  
Rattana Lerdsuwansri
Keyword(s):  
Spatial Variability ◽  
Spatial Correlation ◽  
Sodium Adsorption Ratio ◽  
Descriptive Statistics ◽  
Sodic Soils ◽  
Soil Sodicity ◽  
Class 1 ◽  
Salt Affected Soils ◽  
Study Sites ◽  
Very High

Information on spatial variability of Sodium Adsorption Ratio (SAR) is useful for implementation of appropriate control measures for the salt-affected soils. The major objective of this study was to use geostatistics to describe the spatial variability of (i) the SAR and consequently (ii) the soil sodicity, in areas of different classes of salt-affected soils. Attention was on areas of very severely salt-affected soils (class 1), severely salt-affected soils (class 2), and moderately salt-affected soils (class 3). For each class, 2 study sites were chosen, totally 6 sites were taken into consideration. In each site, 100 soil samples were collected at 0-30 cm depth according to the stratified systematic unaligned sampling method in the dry season of 2012, and analyzed for the SAR in the laboratory. Descriptive statistics and Geostatistics were applied to describe the variability and spatial variability of SAR and soil sodicity, respectively. The result revealed very high variability of SAR. Descriptive statistics showed the CV values of ≥ 35% for every site of every class. When using semivariogram to describe the spatial correlation of SAR, it was found that in 3 study sites, the semivariogram models fitted well with the corresponding semivariogram samples indicating spatial correlation of SAR in the areas. In these cases, the Ordinary Kriging was applied to generate soil sodicity map. The relatively short range values especially for class 1 indicated very high variation of SAR. However, for the other 3 study sites, the linear models were fitted indicating no spatial correlation. Consequently, Trend Surface Analysis was applied instead. According to the soil sodicity maps generated in this study, the areas of class 1 were entirely occupied by strongly sodic soils. For classes 2 and 3, the soils in all study sites belonging to these classes included normal and slightly sodic soils of different proportions. Furthermore, inconsistency of the spatial variability patterns of SAR was found even in areas within the same class of salt-affected soils. As a result, prior to the intensive management of this problem soil in a particular area, investigation on the spatial variability pattern should be performed

scholarly journals A Study on Pattern of Growth in Height Among Children of Dhulikhel Municipality

2016 ◽  
Vol 35 (3) ◽  
pp. 209-217
Author(s):  
Dil Islam Mansur ◽  
Anupama Shrestha ◽  
Kalpana Sharma ◽  
Dilip Kumar Mehta ◽  
Rojina Shakya ◽  
...  
Keyword(s):  
Age Groups ◽  
Medical Problem ◽  
Physical Growth ◽  
Growth Spurt ◽  
Mean Values ◽  
Growth Standards ◽  
Increasing Trend ◽  
The Mean ◽  
And Gender ◽  
One Year

Introduction: Growth reference charts are essential to assess appropriate growth of individual children. The height of an individual is the most widely accepted method for the evaluation of growth of the children. The child's height is primarily determined by the length of his/her bones, and thus the children become tall because their bones grow in length. The purpose of the present study was to develop the mean height reference charts for school going children residing in Dhulikhel and to evolve an easily applied formula to assess the height of the children at different age groups. Material and Methods: The present study consisted of 1726 healthy school going children (945 boys and 781 girls) aged 3-16 years, from different Schools of Dhulikhel Municipality during July – December 2015. Age was recorded in year and height of each child was measured cross-sectionally in centimeter and statistical analysis was done.Results: It has been observed that there was a progressively increasing trend in the mean values of the height with advancement of age in both sexes. The study revealed that the adolescent growth spurt or highest peak velocity of girls (11-12 years) was attained earlier by one year than boys (12-13 years). Conclusions: If a child’s height is consistently or substantially different from the height of other children of the same age and gender, it indicates that the child may have a medical problem and requires monitoring or treatment. The trend of physical growth as observed in height may be expected to serve as the growth standards of Dhulikhel’s children.J Nepal Paediatr Soc 2015;35(3):209-217

scholarly journals Characteristics of artisanal fisheries in the upper reaches of Bonny Estuary, Niger Delta, Nigeria

2019 ◽  
Vol 4 (6) ◽  
Author(s):  
Daniel Utibe I ◽  
Monsi BG
Keyword(s):  
Oxygen Demand ◽  
Fish Growth ◽  
Artisanal Fisheries ◽  
Chemical Parameters ◽  
Wet Season ◽  
Mean Values ◽  
Access To Credit ◽  
Physico Chemical ◽  
The Mean ◽  
Laws And Policies

Characteristics of artisanal fisheries in the upper reaches of Bonny Estuary were investigated for a period of six months from December 2014 to June 2015. Data were collected from randomly selected fishermen from five communities, viz., Bodo, Kpor, Bomu, Lewe and Gbe, using interview and open ended structured questionnaire. The research was carried out to ascertain the fish existed in the study area, types of gear, and methods of fishing, preservation and marketing techniques. The mean values of physico-chemical parameters such as temperature, dissolved oxygen (D.O), salinity, pH, turbidity, and biological oxygen demand (BOD) were 30.47±1.34˚C, 8.64±1.24 mg/l, 16.4±5.78 ppt, 7.66±0.76, 117.0±16.9 NTU and 4.94±2.66 mg/l, respectively. A total of 52 fish species belonging to 24 families were identified and the species diversity and their abundance were determined. Tilapia guineensis was the highest in number (190) with 4.0% of abundance, while Sphryraena afra was the least in number (9) with 2.0% of abundance. The dry season (December–February) recorded the number of 2,772 (57.7%) fin fishes, while the wet season (April–June) found 2,028 (42.3%). The mean number of fish caught was highest in station 2 and lowest in station 4. The physico chemical parameters were within the acceptable limits for fish growth in brackish water ecosystem. The study revealed that the gear commonly used by the fishermen include cast nets, drag nets, hook and line, and traps, while the crafts used were mainly dug-out canoe and non-motorised boat. It also revealed that the constraints responsible for the low catch and poor standard of living of the fishermen as observed include high cost of gear materials, poor condition of boat, no access to credit facilities, destruction of nets by engine boat and environmental pollution. In view of the negative impacts that the aforementioned factors have on the fishermen, it is necessary to implement an effective management of the fisheries through proper enforcement and environmental laws and policies to safeguard and conserve the aquatic biota from going into extinction as well as restoring the source of livelihood to the fishermen in the area under investigation.

scholarly journals Study on Physico-chemical Properties and Fertility Status of Salt Affected Soils of Central Dry Zone of Karnataka, Hiriyur Taluk

2020 ◽  
pp. 161-172
Author(s):  
Parashuram Chandravamshi ◽  
T. V. Jyothi ◽  
A. H. Kumar Naik ◽  
D. A. Sumana
Keyword(s):  
Organic Matter Content ◽  
Chemical Properties ◽  
Matter Content ◽  
Soil Samples ◽  
Soil Reaction ◽  
Available Phosphorus ◽  
Available Nitrogen ◽  
Physico Chemical ◽  
Dry Zone ◽  
Salt Affected Soils

Aim: To study the effect of tube well irrigation water on soil physico-chemical properties and available nutrients status of central dry zone of Karnataka, Hiriyur taluk, Chitradurga district. Place and Duration of Study: Aimangala, Hiriyur, Dharmapura and Javagondanahally hoblis of Hiriyur taluk, Chitradurga district from January, 2019 to September, 2019. Methodology:  Ninety-six soil samples using GPS from 0 - 22.5 cm depth were collected randomly representing Aimangala, Hiriyur, Dharmapura and Javagondanahally hoblis of Hiriyur taluk, Chitradurga district. The soil samples were analyzed in the laboratory for various physico-chemical parameters (pH and EC), organic carbon and available major (N, P2O5 and K2O) and micronutrients (Fe, Zn, Mn and Cu) status. Results and Conclusion:  The results revealed that the villages studied in different hoblis were saline to sodic in soil reaction, non-saline to saline, low to high in organic matter content, low to high in available nitrogen, low to high in available phosphorus and low to high in available potassium status and sufficiency in micronutrients viz., Cu, Fe and Mn and deficient in Zn in some of the villages.

scholarly journals Study of dissolve oxygen, salinity and temperature around western offshore- A case study around North Bombay of ONGC’s offshore Filed, Arabian Sea, India

2021 ◽  
Vol 02 (01) ◽  
pp. 091-100
Author(s):  
Rajkumar Mandal ◽  
Gada Lal Das
Keyword(s):  
Dissolve Oxygen ◽  
Arabian Sea ◽  
Preventive Measure ◽  
Biological Productivity ◽  
Mean Values ◽  
Environmental Status ◽  
Increasing Trend ◽  
Oil And Natural Gas ◽  
The Mean

Marine ecosystems cover approximately 71% of the Earth's surface and contain approximately 97% of the planet's water. Dissolve oxygen, which is a vital parameter in Ocean’s primary production, is having a sensitive integrating property reflecting physical and biogeochemical changes in the marine environment. The other parameters like temperature, though conservative, has a great impact upon biological productivity and salinity is important to understand the dynamics of water column. By analyzing the variation of dissolve oxygen, temperature and salinity, environmental status of that particular study area can be assessed. As a preventive measure to protect water bodies, Oil and Natural Gas Corporation Limited, India is regularly conducting Offshore Environment Monitoring around western continental shelf of Arabian Sea, where ONGC’s Platforms and Installations are located. The paper includes the output of monitoring activities of ONGC around north Bombay considering these three parameters i.e. temperature, salinity and dissolved oxygen for assessing the environmental health of the study area. A trend analysis of the three parameters around North Bombay of ONGC’s offshore Filed (NA & NQ platform) has been done considering the monitoring data from the year 2017-18 to 2020-21 and their variation has been studied. It has been observed from the study that there is an increasing trend of dissolve oxygen and salinity for both platform (NA & NQ). It is observed that trend of temperature for NA platform is decreasing whereas around NQ it is increasing. The mean values of three parameters are comparable with reference mean values and the variations are insignificant.

scholarly journals Morphological and Physico-chemical Characterization of Salt-Affected Soils of Muktsar District of Punjab

Agropedology ◽  
2019 ◽  
Vol 27 (2) ◽  
Author(s):  
O.S. Sandhu ◽  
◽  
H.S. Jassal ◽  
S.S. Dhaliwal ◽  
◽  
...  
Keyword(s):  
Sandy Loam ◽  
Chemical Characterization ◽  
Saline Soils ◽  
Organic Carbon Content ◽  
Silty Clay ◽  
Sodic Soils ◽  
Massive Structure ◽  
Physico Chemical ◽  
Salt Affected Soils

Nine representatives salt-affected (P1 to P9) soils from Muktsar district of Punjab were studied for their morphological and physico-chemical characteristics. Pedon P1, P2 and P3 belong to saline soils, P4, P5 and P6 categorised as sodic soils and P7, P8 and P9 represent the saline-sodic soils. These pedons have weak to moderate, fine to medium subangular blocky structure in A and B horizon and massive structure in C horizons. The calcretes in saline-sodic soils were comparable to saline soils but higher than sodic soils. The texture of these soils varied from silty clay loam, silt, and silt loam through loam to sandy loam. The pH of the soil ranged from 8.3 to 10.2, 8.6 to 10.0 and 8.2 to 9.4 in saline, sodic and saline-sodic soils, respectively. Electrical conductivity in surface horizon varied from 4.96 to 19.1 dS m-1 in saline soils, 0.44 to 2.25 dS m-1 in sodic-soils and 2.30 to 11.8 dS m-1 in saline-sodic soils. Organic carbon content ranged from 0.02 to 0.87 per cent in saline soils, 0.01 to 0.29 per cent in sodic soils and 0.01 to 0.68 per cent in saline-sodic soils and decreased with depth. Calcium and magnesium cations were dominated on the exchange complex and their content varied from 3.2 to 6.4 cmol(+)kg-1 and that of Na+ and K+ varied from 0.09 to 2.87 and 0.06 to 2.33 cmol(+)kg-1, respectively.

scholarly journals Physico-Chemical Trends in the Sediments of Agbede Wetlands, Nigeria

2017 ◽  
Vol 0 (0) ◽  
Author(s):  
Abdul-Rahman Dirisu ◽  
John Ovie Olomukoro ◽  
Ifeanyi Maxwell Ezenwa
Keyword(s):  
Alkali Metals ◽  
Anthropogenic Activities ◽  
Sediment Quality ◽  
Principal Component ◽  
Mean Values ◽  
Physico Chemical ◽  
Lotic System ◽  
The Mean ◽  
And Cluster Analysis ◽  
Chemical Trends

Abstract This study assessed the physico-chemical status of sed­iments in the Agbede Wetlands with the aim to create a reference archive for the Edo North catchment and to further identify the characteristics mostly influenced by the natural and anthropogenic activities going on at the watershed. Nutrients, zinc, nickel and lead were identified to be mostly of anthropogenic origin, while alkali metals and alkaline earth metals were from both anthropogenic and natural sources. The clustering of stations 1 and 4 indicates that the sediment quality in the lentic systems was not completely excluded from the lotic system, suggesting that principal component analysis (PCA) and cluster analysis (CA) techniques are invaluable tools for identifying factors influencing the sediment quality. The mean values of the particle size distribution were in the following order across the ecosystems: sand (61.86-80.53%) > silt (9.75-30.34%) > clay (7.83-13.89%). The contamination of the water bodies was primarily derived from agricultural run-offs and through geochemical weathering of the top soils. Therefore, our analysis indicates that the concentra­tions of cations, anions and nutrients in the sediments of the lotic and lentic ecosystems in Agbede Wetlands are not at an alarming level.

scholarly journals Assessment of Some Water Quality Parameters of Bansi River in Monsoon and Winter Seasons

2013 ◽  
Vol 5 (2) ◽  
pp. 53-57
Author(s):  
MMM Hoque ◽  
S Roy ◽  
MN Hoque ◽  
MZ Islam
Keyword(s):  
Water Quality ◽  
Ph Value ◽  
Monsoon Season ◽  
Winter Season ◽  
Quality Parameters ◽  
Water Quality Parameters ◽  
Mean Values ◽  
Physico Chemical ◽  
The Mean ◽  
The Government

The study was carried out to assess some physico-chemical water quality parameters and pollution scenario of the Bansi river. Water samples were collected from 8 different selected stations at Bagholpur to Nayarhat portion of Bansi river during winter and monsoon periods. The values of all parameters except temperature and DO were found higher in winter season compared to that of monsoon season. The water was slightly alkaline to strongly alkaline ranging from average pH value of 7.6 in monsoon to 8.5 in winter. The DO was found unsuitable for fisheries and irrigation purposes. The BOD was found extremely higher in winter than that of standard level set by the Government of Bangladesh. The mean values of EC in monsoon was 452.4 ?s/cm, whereas in winter season it was 901 ?S/cm, the value of DO in monsoon season was 4.7 mg/l whereas in winter it was 3.2 mg/l, the value of BOD in monsoon season was 8.9 mg/l and in winter season it was 31.4 mg/l, the value of TDS in monsoon season was 306.3 mg/l and in winter season it was 496 mg/l, the value of alkalinity in monsoon season 50.4 mg/l and in winter season it was 146.5 mg/l.DOI: http://dx.doi.org/10.3329/jesnr.v5i2.14601 J. Environ. Sci. & Natural Resources, 5(2): 53-57 2012

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