scholarly journals Macro nutrient status of Sundarbans forest soils in Southern region of Bangladesh

2019 ◽  
Vol 54 (1) ◽  
pp. 67-72 ◽  
Author(s):  
MZ Khan ◽  
MS Amin
Keyword(s):  
Electrical Conductivity ◽  
Organic Carbon ◽  
Standard Method ◽  
Cation Exchange Capacity ◽  
Mangrove Forest ◽  
Nutrient Status ◽  
Exchange Capacity ◽  
Water Soluble ◽  
Sundarban Mangrove ◽  
Exchangeable Magnesium

An attempt has been made to evaluate the condition of soil of the Sundarban mangrove forest of Bangladesh by applying standard method. Soil pH was varied from 6.63 to 7.87. Organic carbon of soil was found 4.06, 4.79, 5.59, 9.38 and 9.80 (gKg-1) at Kotka, Kochikhali, Hironpoint, Harbaria, and Dublarchar, respectively. The electrical conductivity of soil was varied from 14.39, to 42.89 (dSm-1) in the study areas.The cation exchange capacity in the soils was varied from 22.32 to 27.2 Cmolckg-1 in the study area. The average percentages of total nitrogen content in the soil were varied from 0.04 to 0.08%. The soils of Oligohaline zone of Sundarban mangrove forest are rich in water soluble and exchangeable magnesium followed by calcium and the potassium. The percentages of silt and clay were higher than sand in all study areas. Dissolved chloride in the soil was found 7010, 4186,11750 and 16389 (μg g-1) at Hironpoint, Harbaria, Dublarchar and Kotka respectively. Bangladesh J. Sci. Ind. Res.54(1), 67-72, 2019

scholarly journals A Study of Physio-Chemical Properties of Healthy and Declined Nagpur Mandarin Orchards

2020 ◽  
pp. 70-74
Author(s):  
Prashant Joshi ◽  
Dhiraj Kadam ◽  
Shakti Tayde ◽  
Yogesh Dharmik
Keyword(s):  
Electrical Conductivity ◽  
Organic Carbon ◽  
Cation Exchange ◽  
Bulk Density ◽  
Cation Exchange Capacity ◽  
Soil Depth ◽  
Chemical Properties ◽  
Exchange Capacity ◽  
Nitrogen And Phosphorus ◽  
Available Nitrogen

The present investigation was carried out to characterize and classify some typical healthy and declined Nagpur mandarin gardens in Warud and Morshi Tahsil’s of Amravati District (M.S.). Total forty two representative surface and depth soil samples from healthy and declined Nagpur mandarin gardens were collected and analyzed for various physico-chemical properties. The findings revealed that the texture of soil is clayey (40 - 59 % clay in healthy gardens and 47.4 - 61.4 % clay in declined gardens). The bulk density and porosity in healthy gardens ranged 1.51 - 1.67 mg.m-3, 35.85 - 43.02 % in declined gardens; it varied from 1.51 to 1.66 mg.m-3 and 25.85 to 43.02 % respectively. The pH, organic carbon and CaCO3 content in healthy gardens soils varies 7.5 - 8.0, 4.8 - 9.0 g kg-1, 5.35 - 8.31 % and in declined gardens it’s 7.7 - 8.2, 1.95 - 3.75 gm kg-1, 6.71 - 10.53 % respectively. The electrical conductivity and cation exchange capacity of healthy gardens soil was noticed 0.21 - 0.28 d.Sm-1, 45.92 - 55.53 c.mol (p+) kg ha-1 and in declined gardens it varied 0.22 - 0.32 d.Sm-1, 46.20 - 51.92 c.mol (p+) kg ha-1 respectively. Further, no significant difference was found in clay, bulk density, porosity, electrical conductivity and cation exchange capacity in healthy and declined gardens; however soil reaction was found high in declined gardens than healthy gardens. Organic carbon content was high and free lime content was reported lower in healthy gardens than declined gardens. Study on depth wise distribution showed that bulk density, pH and electrical conductivity increase with soil depth. Organic carbon and cation exchange capacity decreases with soil depth. The available nitrogen, phosphorus and potassium content of healthy gardens surface soils are ranged 206.0 - 273.7 kg ha-1, 25.0 - 38.3 kg ha-1, 324 - 672 kg ha-1 and in declined gardens it’s varied as 135.4 - 206.8 kg ha-1, 19.8 - 23.3 kg ha-1, 364 - 750.4 kg ha-1 respectively. Available nitrogen and phosphorus content in healthy gardens found more supporting than declined ones. Depth wise distribution showed that available nitrogen and phosphorus showed decreasing trend with the soil depth.

scholarly journals Nutrient status of soil and regenerated Garjan (Dipterocarpus turbinatus Gaertn.) seedlings in Dulahazara Garjan Forest, Cox’s Bazar, Bangladesh

2018 ◽  
Vol 7 (2) ◽  
pp. 79-88
Author(s):  
MK Huda ◽  
MAM Chowdhury
Keyword(s):  
Organic Carbon ◽  
Cation Exchange ◽  
Cation Exchange Capacity ◽  
Sandy Loam ◽  
Nutrient Status ◽  
Exchange Capacity ◽  
Total N ◽  
Top Soil ◽  
Forest Division ◽  
Silty Loam

Soil: Plant nutrient status in naturally regenerated garjan (Dipterocarpus turbinatus Gaertn.) seedlings of 3, 9, 15, 21, 27 and 33 months old were studied in twelve stands of three sites on late and early monsoon during 1994 to 1995 in Dulahazara garjan forest of Cox’s Bazar forest division. Soil samples were collected from two profiles (i.e. top soil and sub soil) of twelve stands in three sites. Soil moisture content, pH, texture, electrical conductivity, cation exchange capacity, organic carbon, total N and available P, K, Ca, Mg, Mn and Fe were determined. Soils were found to be silty loam to sandy loam with an average pH of 5.06. The average values of organic carbon and cation exchange capacity were 0.74% and 6.23 meq/100g respectively. The soils were poor in total nitrogen (689 μg g-1) and the average values of available mineral nutrients such as P, K, Ca, Mg, Mn and Fe in soil were 3.15, 53, 40, 47, 36 and 0.94 μg g-1, respectively. The soil in site -S2 appeared to be more fertile than those of site-S1 and site-S3. The average values of N, P, K, Ca, Mg, Mn and Fe in leaf- bud were found to be 1.80, 0.13, 0.94, 0.72, 0.23, 0.06 and 0.014% respectively. Leaf-bud nutrients showed a marked variation both with seasons as well as ages. Leaf-bud of late monsoon contained higher concentrations of P, Mg and Ca compared to leaf-bud of early monsoon which contained higher concentrations of N, K and Fe. Nutrient cycling in soil:leafbud system of regenerated garjan seedling of 3-33 months old varied with seasons and ages. The present study reveals that concentrations of Mn were significantly correlated between leaf-bud and soil whereas P showed the negative correlation indicating that in spite of low quantity of P in the soil, leaf bud had higher quantity. Jahangirnagar University J. Biol. Sci. 7(2): 79-88, 2018 (December)

EVALUASI PERUBAHAN KUALITAS TANAH PADA LAHAN BEKAS PENAMBANGAN NIKEL DI PULAU GEBE

2018 ◽  
Vol 4 (1) ◽  
Author(s):  
Mardi Wibowo
Keyword(s):  
Organic Carbon ◽  
Cation Exchange ◽  
Cation Exchange Capacity ◽  
Exchange Capacity ◽  
Mining Activity ◽  
Evaluation Activity ◽  
Land Quality ◽  
Environment Quality

Since year 1977 until 2005, PT. ANTAM has been exploited nickel ore resources at Gebe Island – Center ofHalmahera District – North Maluku Province. Mining activity, beside give economically advantages also causedegradation of environment quality espicially land quality. Therefore, it need evaluation activity for change ofland quality at Gebe Island after mining activity.From chemical rehabilitation aspect, post mining land and rehabilitation land indacate very lack and lackfertility (base saturated 45,87 – 99,6%; cation exchange capacity 9,43 – 12,43%; Organic Carbon 1,12 –2,31%). From availability of nutrirnt element aspect, post mining land and rehabilitation land indicate verylack and lack fertility (nitrogen 0,1 – 1,19%). Base on that data, it can be concluded that land reclamationactivity not yet achieve standart condition of chemical land.Key words : land quality, post mining lan

scholarly journals Spatial variability of fertility status in soils of Dima Hasao district of Assam

2021 ◽  
Vol 23 (3) ◽  
pp. 368-374
Author(s):  
A. BASUMATARY ◽  
Keyword(s):  
Organic Carbon ◽  
Cation Exchange ◽  
Cation Exchange Capacity ◽  
Exchange Capacity ◽  
Organic Carbon Content ◽  
Critical Limit ◽  
Available Nitrogen ◽  
Cu Content ◽  
Fertility Status ◽  
High Organic Carbon Content

Two hundred fifty geo-referenced surfaces (0-15 cm) soil samples were collected and analysed for macronutrients and micronutrients to study fertility status in soils of Dima Hasao district of Assam and their relationship with some important soil properties. Soils of the district were found to be extremely acidic to slightly acidic in reaction with a low to high organic carbon content and low in cation exchange capacity. The soil of the district indicated that the available nitrogen, phosphorus and potassium status was observed to the tune of 14.0 %,7.2% and 67.2% under low and 86.0 %, 92.8 % and 32.8 %under medium categories, respectively. The overall percent deficient of exchangeable calcium, magnesium and available sulphur in soils was 25.6, 30.4 and 6.8 %, respectively. Based on critical limit, all soils were adequately supplied with DTPA-extractable Fe, Mn and Cu content. In respect of zinc and boron, soils exhibited 90.4 and 73 per cent under sufficient, while, 2.4 and 12 per cent were found deficient in DTPA -Zn and HWS-B, respectively. Soil pH and EC showed positive correlation with macro nutrients and negative correlation with micronutrients. The macro- and micronutrient showed significant positive relation with soil organic carbon and cation exchange capacity.

scholarly journals Volume‐related quantification of organic carbon content and cation exchange capacity of macropore surfaces in Bt horizons

2020 ◽  
Vol 19 (1) ◽  
Author(s):  
Martin Leue ◽  
Daniel Uteau ◽  
Stephan Peth ◽  
Steffen Beck‐Broichsitter ◽  
Horst H. Gerke
Keyword(s):  
Organic Carbon ◽  
Cation Exchange ◽  
Carbon Content ◽  
Cation Exchange Capacity ◽  
Exchange Capacity ◽  
Organic Carbon Content

Sorption of Anionic Pentachlorophenol (PCP) in Aquatic Environments: The Effect of pH

1992 ◽  
Vol 25 (11) ◽  
pp. 41-48 ◽  
Author(s):  
Y. Shimizu ◽  
S. Yamazaki ◽  
Y. Terashima
Keyword(s):  
Organic Carbon ◽  
Aqueous Phase ◽  
Cation Exchange Capacity ◽  
Clay Content ◽  
Exchange Capacity ◽  
Poor Correlation ◽  
Aquatic Environments ◽  
Organic Carbon Content ◽  
Swelling Clay ◽  
Ph Range

The sorption of pentachlorophenol (PCP, pKa’ = 4.75) onto natural solids from aqueous phase was investigated by batch sorption experiments. The experimental aqueous phase was prepared for set values of pH (2 to 12) and ionic strength (0.1 M). Experimental results indicated that the sorption decreased with increasing pH over the entire pH range tested. A simple mathematical model, based on the hypotheses that the sorption coefficients of non-ionized and ionized species are different and the pH has only negligible effect on the natural solid characteristics, was applied to the pH range between 6 and 8, and the sorption coefficients (Kd) of both species were estimated. The Kd of ionized species (phenolate anion) was smaller than that of non-ionized species. The Kd of both species had poor correlation to the organic carbon content of natural solids. The Kd, however, correlated well with the swelling clay content and cation exchange capacity of natural solids. These results indicated that the sorption of PCP was not controlled by the organic carbon referenced hydrophobic sorption. For broader pH range (i.e., below 6 or above 8), the dependence of the natural solid characteristics on pH must be additionally included in the model.

Co-composting of distillery and winery wastes with sewage sludge

2007 ◽  
Vol 56 (2) ◽  
pp. 187-192 ◽  
Author(s):  
M.A. Bustamante ◽  
C. Paredes ◽  
R. Moral ◽  
J. Moreno-Caselles ◽  
M.D. Pérez-Murcia ◽  
...  
Keyword(s):  
Electrical Conductivity ◽  
Sewage Sludge ◽  
Cation Exchange ◽  
Cation Exchange Capacity ◽  
Exchange Capacity ◽  
Total N ◽  
Organic C ◽  
Mediterranean Countries ◽  
Feasible Option ◽  
Total Organic C

The winery and distillery wastes (grape stalk and marc (GS and GM, respectively), wine lees (WL) and exhausted grape marc (EGM)) are produced in great amounts in the Mediterranean countries, where their treatment and disposal are becoming an important environmental problem, mainly due to their seasonal character and some characteristics that make their management difficult and which are not optimised yet. Composting is a treatment widely used for organic wastes, which could be a feasible option to treat and recycle the winery and distillery wastes. In this experiment, two different piles (pile 1 and 2) were prepared with mixtures of GS, GM, EG and sewage sludge (SS) and composted in a pilot plant by the Rutgers static pile composting system. Initially, GS, GM and EGM were mixed, the pile 1 being watered with fresh collected vinasse (V). After 17 days, SS was added to both piles as a nitrogen and microorganisms source. During composting, the evolution of temperature, pH, electrical conductivity, total organic C, total N, humic acid-like C and fulvic acid-like C contents, C/N ratio, cation exchange capacity and germination index of the mixtures were studied. The addition of V in pile 1 produced higher values of temperature, a greater degradation of the total organic C, higher electrical conductivity values and similar pH values and total N contents than in pile 2. The addition of this effluent also increased the cation exchange capacity and produced a longer persistence of phytotoxicity. However, both piles showed a stabilised organic matter and a reduction of the phytotoxicity at the end of the composting process.

Radial variations in cation exchange capacity and base saturation rate in the wood of pedunculate oak and European beech

2002 ◽  
Vol 32 (10) ◽  
pp. 1829-1837 ◽  
Author(s):  
J Herbauts ◽  
V Penninckx ◽  
W Gruber ◽  
P Meerts
Keyword(s):  
Cation Exchange ◽  
Cation Exchange Capacity ◽  
European Beech ◽  
Base Cation ◽  
Exchange Capacity ◽  
Water Soluble ◽  
Soluble Form ◽  
Pedunculate Oak ◽  
Exchangeable Ca ◽  
Saturation Rate

In a mixed forest stand on an ochreous brown earth in the Belgian Ardennes, pedunculate oak (Quercus robur L.) and European beech (Fagus sylvatica L.) have outwardly decreasing cation concentration profiles in wood. To test if these profiles can be ascribed to endogenous factors or to decreased availability of cations in the soil, radial profiles of water-soluble, exchangeable, and total cations and of cation exchange capacity (CEC) of wood were determined. In both species, [Formula: see text]75% of K is in the water-soluble form so is of little use for dendrochemical monitoring. About 80% of Mg is adsorbed on wood exchange sites. For Ca, 30 (beech) to 60% (oak) of total content cannot be extracted by SrCl2 and is, thus, relatively immobile in wood. Wood CEC decreases from pith to bark in European beech and from pith to outer heartwood in pedunculate oak. Decreasing profiles of exchangeable Ca and Mg in pedunculate oak and exchangeable Ca in European beech are strongly constrained by CEC and, thus, are not related to environmental change. Base cation saturation rate shows no consistent radial change in either species. European beech maintained much higher base cation saturation rate than pedunculate oak, although both species had similar CEC. In conclusion, the results do not provide convincing evidence for a significant change in nutritional status of pedunculate oak and European beech in the Belgian Ardennes due to atmospheric pollution.

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