scholarly journals Distribution of DTPA Extractable Micronutrients in Soils of Central Telangana Region of Telangana

2020 ◽  
pp. 189-194
Author(s):  
M. Ram Prasad ◽  
P. Ravi ◽  
K. Surekha
Keyword(s):  
Particle Size ◽  
Organic Carbon ◽  
Particle Size Distribution ◽  
Strong Influence ◽  
Soil Samples ◽  
Critical Limit ◽  
The Vertical Distribution ◽  
Available Zinc ◽  
Extractable Micronutrients ◽  
Extractable Zn

Forty soil samples from ten pedons of the Central Telangana region, Telangana were studied for the vertical distribution of DTPA extractable. Zn, Cu, Fe and Mn and their relationship with some soil properties. Soil pH, CaCO3,, organic carbon and particle-size distribution had a strong influence on the distribution of these micronutrients. The content of the micronutrient increased with the an increase in organic carbon and decreased with an increase in pH and CaCO3. There was a decreasing trend for the distribution of these micronutrients with respect to depth. As per the critical limit prescribed for Zn, and Fe, 55 and 12% of the soil could be rated as deficient in available zinc and iron, respectively. Copper and manganese were found to be adequate.

scholarly journals DTPA-Extractable Zinc in Rice Soils and Its Availability to Rice

2016 ◽  
Vol 11 (2) ◽  
pp. 662-669
Author(s):  
Dhaneshwar Padhan ◽  
Arup Sen ◽  
Biplab Pal
Keyword(s):  
Organic Carbon ◽  
Soil Organic Carbon ◽  
Chemical Properties ◽  
Zinc Content ◽  
Zn Deficiency ◽  
Command Area ◽  
Critical Limit ◽  
Rice Soils ◽  
Available Zinc ◽  
Extractable Zn

Zinc (Zn) deficiency is a fairly wide spread agronomic constraint in many of the world rice production regions. Information on soil Zn distribution is essential for understanding its chemical reactions and bioavailability. In this backdrop, we tried to find out the relationship between physic-chemical properties and DTPA-extractable Zn (available Zn) content of rice soils. For this eighty four (84) surface soil samples (0-20cm) were collected from three villages (viz. Saharapali, Nuagarh and Adgaon) of Bargarh district under the Hirakud Command Area of Odisha. Analytical observations revealed that the soils were slightly acidic in reaction with moderately high content of soil organic carbon. Considering the critical limit of available Zn in soils to be 0.6 mg kg-1, all soils of the study area were found to be well supplied with DTPA-extractable Zn. Soil organic carbon (SOC) content maintained positive and significant correlation with available zinc content in soils. However, soil pH showed significant but negative correlation with available zinc content of soils.

scholarly journals Applicability of laser diffraction analyses in soil physics practice

2016 ◽  
Vol 5 (1-2) ◽  
pp. 32-37
Author(s):  
András Makó ◽  
József Szabó ◽  
Zsófia Bakacsi ◽  
Sándor Koós ◽  
Gabriella Hauk ◽  
...  
Keyword(s):  
Particle Size ◽  
Particle Size Distribution ◽  
Laser Diffraction ◽  
Soil Samples ◽  
Soil Types ◽  
Diffraction Measurement ◽  
Boundary Values ◽  
Soil Physics ◽  
Soil Database ◽  
First Results

In this research we present the first results how can be used laser diffraction measurement in soil physics practice. The main goals are understanding differences of particle size distribution (PSD) measurments, developing converting methods of PSD data of different determinations. In order to realization of this survey a representative soil database of Hungarian soil types was built up. We compared PSDs of 157 soil samples measured with sieve-pipette method (SPM) and laser diffractometer technique (Malvern Mastersizer 2000) (LDM). Soil textural classes were also determined using the USDA texture triangle. We used the clay/silt fraction boundary values (clay < 0.0066 mm; silt: 0.0066 - 0.05 mm) introduced for the LDM data in order to take them comparable to PSD data determined by the SPM: We got higher similarities of clay and silt fractions of the modified size boundary values. For the used dataset correspondence of texture classes derived from SPM and LDM PSD data, however is not higher than 60%.

scholarly journals Properties of Humic Acids in Meadow Soils Irrigated With the Slope-And Flooding System

2021 ◽  
Author(s):  
Magdalena Banach-Szott ◽  
Andrzej Dziamski
Keyword(s):  
Particle Size ◽  
Organic Matter ◽  
Organic Carbon ◽  
Humic Acids ◽  
Soil Samples ◽  
Hydrophobic Properties ◽  
Irrigation Ditch ◽  
Ft Ir ◽  
Degree Of Maturity

Abstract The aim of the research has been to determine the effect of many-year irrigation of unique grasslands on the properties of humic acids defining the quality of organic matter. The research was performed based on the soil (Albic Brunic Arenosol, the A, AE and Bsv horizons) sampled from Europe’s unique complex of permanent grasslands irrigated continuously for 150 years, applying the slope-and-flooding system; the Czerskie Meadows. The soil samples were assayed for the content of total organic carbon (TOC) and the particle size distribution. HAs were extracted with the Schnitzer method and analysed for the elemental composition, spectrometric parameters in the UV-VIS range, hydrophilic and hydrophobic properties and the infrared spectra were produced. The research results have shown that the HAs properties depended on the depth and the distance from the irrigation ditch. The HAs of the A horizon of the soils were identified with a lower “degree of maturity”, as reflected by the values of atomic ratios (H/C, O/C, O/H), absorbance coefficients, and the FT-IR spectra, as compared with the HAs of the Bsv horizon. The HAs molecules of the soils sampled furthest from the irrigation ditch were identified with a higher degree of humification, as compared with the HAs of the soils sampled within the closest distance. The results have demonstrated that many-year grassland irrigation affected the structure and the properties of humic acids.

Physical and chemical characteristics of cryoconites, sampled from glaciers of the Central Caucasus (Russia).

2021 ◽  
Author(s):  
Ivan Kushnov ◽  
Evgeny Abakumov ◽  
Rustam Tembotov ◽  
Viacheslav Polyakov
Keyword(s):  
Particle Size ◽  
Organic Carbon ◽  
Particle Size Distribution ◽  
Solid Phase ◽  
Basal Respiration ◽  
Chemical Characteristics ◽  
Significant Similarity ◽  
Physical And Chemical Characteristics ◽  
Central Caucasus ◽  
Physical And Chemical

&lt;p&gt;Cryoconites are a dark-colored granular sediments found in glacial landscapes. Cryoconites are known as a dark colored accumulation of various origin material in superficial holed of the glaciers which formed in polar and mountain regions of the Earth. They can significantly accelerate glacier retreating by reducing the albedo of the glacier and play a significant role in the colonization of the territory after its retreat, being an &quot;oasis&quot; for development of microorganisms on an uninhabited glacier surface. The understanding of key cryoconites properties is necessary to understand their impact on the mountain glaciers of the Central Caucasus, especially taking into account their recent rapid retreat.&lt;/p&gt;&lt;p&gt;The aim of this research is to study the physical and chemical characteristics of various cryoconites and cryoconite derived periglacial soils of the Central Caucasus. Eight cryoconite samples and eight soil samples from three soil sections were selected. The following characteristics of the samples were determined in laboratory conditions: total organic carbon (TOC), basal respiration level, pH H&lt;sub&gt;2&lt;/sub&gt;O and exchangeable soil acidity, solid phase density and particle size distribution.&lt;/p&gt;&lt;p&gt;The results of the analyses showed both differences and some similarities in the physical and chemical characteristics of the cryoconites and soils of periglacial zone which were studied. Cryoconites, on average, are characterized by lower values of basal respiration than more developed soils from this region. The total organic carbon content in most samples was relatively low, but its values increase significantly soils investigated due to accumulation of carbon in fine earth under the influence of primary vegetation. The water extractable acidity values showed a significant similarity between the studied cryoconites and soils, they vary from slightly acidic to slightly alkaline in both groups. At the same time, the variation of exchangeable acidity values between cryoconite samples is significantly greater than in developed soils. Moreover, the density of the solid phase of the studied cryoconites varies in a larger range of values than that of the studied soils due to variety of sources of cryoconite materials. However, the analysis of particle size distribution showed a significant similarity of the studied objects: in almost all samples there is a significant dominance of the sand fraction (d=1-0.05 mm). The obtained data indicate both the difference in the physical and chemical properties of the studied cryoconites among themselves, and the probable influence of cryoconites on soil formation in this region.&lt;/p&gt;&lt;p&gt;This work was supported by Russian Foundation for Basic Research, project No &lt;strong&gt;19-05-50107&lt;/strong&gt; &amp;#160;&amp;#8220;The role of microparticles of organic carbon in degradation of ice cover of polar regions of the Earths and in the process of soil-like bodies formation&amp;#8221;.&lt;/p&gt;

IMPACT OF FALLOWS ON THE WATER-PHYSICAL PROPERTIES OF CHESTNUT SOILS

2020 ◽  
Vol 15 (4) ◽  
pp. 520-527
Author(s):  
S.O. Kanzyvaa ◽  
◽  
S.B.N. Kuzhuget ◽  
N.D. Chadamba ◽  
A.V. Khuurak ◽  
...  
Keyword(s):  
Particle Size ◽  
Particle Size Distribution ◽  
Physical Properties ◽  
Water Permeability ◽  
Arable Land ◽  
Soil Samples ◽  
Moisture Capacity ◽  
Chestnut Soils ◽  
Fallow Soil ◽  
The Republic

Modern arable land in the Republic of Tyva is located on chestnut soils (69%) and chernozems (25%), but the former are characterized by low fertility. Soil fertility depends on the particle size distribution, structure, water-air regime, etc. Durind agricultural use of soils, the disturbance of the structure, especially of light particle size distribution, as well as depletion of humus and nutrient reserves can occur in them. Therefore, the aim of our work was to identify the influence of fallows on the change in the waterphysical properties of chestnut soils of the BarunKhemchiksky district of the Republic of Tyva. The chestnut soils of fallow and arable lands of the Barun-Khemchiksky district of the Republic of Tyva with the laying of two soil sections in arable and fallow fields were chosen as the object of the study. Soil samples from two horizons (arable and subsurface) were selected by the five-spot method. The water properties of these soils were subjected to the following analyzes: determining the water permeability of the soil according to the method of N. A. Kachinsky, determining the speed and height of rising water, determining the total capillary moisture capacity. As a result, it was found that the soil cover of the studied territories is represented by light loamy chestnut soils. Samples of fallow soil showed good water permeability with the amount of incoming water 80–100 mm per 1 hour. The water-lifting rate of soil arable land samples is slightly greater than the soil samples of the fallow: the soil sample of the arable layer of the arable land was completely moistened after 20 minutes, and the soil sample of the arable horizon of the fallow – only after 40 minutes. The moisture capacity of the fallow soil samples turned to be slightly higher than the arable land. An analysis of the studied samples indicates the improvement in the water-physical properties of the chestnut soils of the fallow compared with the arable field. Relatively low moisture capacity and accelerated water capacity indicate a destroyed and dispersed structure of arable land.

scholarly journals On soil textural classifications and soil texture-based estimations

2017 ◽  
Author(s):  
Miguel Ángel Martín ◽  
Yakov A. Pachepsky ◽  
Carlos García-Gutiérrez ◽  
Miguel Reyes
Keyword(s):  
Experimental Data ◽  
Particle Size ◽  
Particle Size Distribution ◽  
Bulk Density ◽  
Soil Texture ◽  
Fine Sand ◽  
Soil Samples ◽  
Soil Parameters ◽  
Medium Sand ◽  
Texture Representation

Abstract. The soil texture representation with the standard textural fraction triplet 'sand-silt-clay' is commonly used to estimate soil properties. The objective of this work was to test the hypothesis that other fraction sizes in the triplets may provide better representation of soil texture for estimating some soil parameters. We estimated the cumulative particle size distribution and bulk density from entropy-based representation of the textural triplet with experimental data for 6300 soil samples. Results supported the hypothesis. For example, simulated distributions were not significantly different from the original ones in 25 and 85 % of cases when the 'sand-silt-sand' and 'very coarse+coarse + medium sand – fine +very fine sand – silt+clay', were used, respectively. When the same standard and modified triplets were used to estimate the average bulk density, the coefficients of determination were 0.001 and 0.967, respectively. Overall, the textural triplet selection appears to be application- and data-specific.

scholarly journals Risiko des Eintrags von Phosphor in den Hallwilersee durch Bodenerosion

2015 ◽  
Vol 70 (3) ◽  
pp. 193-198 ◽  
Author(s):  
S. Müller ◽  
D. Schaub
Keyword(s):  
Particle Size ◽  
Soil Erosion ◽  
Particle Size Distribution ◽  
Size Distribution ◽  
Surface Waters ◽  
Aggregate Stability ◽  
Eutrophic Lake ◽  
Soil Samples

Abstract. An important factor in the release of phosphorus by soil erosion, with corresponding consequences on the quality of surface waters, is the formation of aggregates and their stability. Around the eutrophic Lake Hallwil six arable lands were examined in five repetitions regarding aggregate and particle size distribution, P-contents of the different fractions and aggregate stability. Central to this was the use of the setting column for fractionation of soil samples. In the case of Lake Hallwil the risk of phosphorus discharges by soil erosion seems low since the phosphorus is mainly bound in aggregates which are transported over short distances only. Thus other pathways (runoff from grassland, leaching via drains) may be more important.

scholarly journals Physicochemical Characteristics, Particle Size Distribution and Total Hydrocarbon Content in Soil from Abandoned Landfill Site in Igbogene, Bayelsa state, Nigeria

2020 ◽  
Vol 24 (4) ◽  
pp. 729-734
Author(s):  
S.A. Uzoekwe ◽  
U.L. Anekwe
Keyword(s):  
Particle Size ◽  
Organic Carbon ◽  
Particle Size Distribution ◽  
Size Distribution ◽  
Total Nitrogen ◽  
Physicochemical Characteristics ◽  
Landfill Site ◽  
Total Hydrocarbon ◽  
Hydrocarbon Content ◽  
Total Hydrocarbon Content

Most household and some industrial solid wastes end up in the landfill which is the commonest means of solid waste management in many parts of Baylesa state, Nigeria. This study assessed the physicochemical characteristics, particle size distribution and total hydrocarbon content in soil samples from abandoned landfill site in Igbogene, Bayelsa state, Nigeria by collecting samples from varying distances (50m, 100m and 150m) at a depth of 0-20cm and analyzed using standard methods. Results were in the range of 5.01 – 5.34 (pH), 0.73 – 0.98 meg/100g (Exchangeable Acidity), 2.45 – 3.48 meg/100g (sodium), 0.19 – 0.31 meg/100g (potassium), 3.94 – 5.33 meg/100g (calcium), 1.52 – 2.15 meg/100g (magnesium), 9.57 – 11.49 mg/kg (nitrate), 4.18 – 5.19 mg/kg (sulphate), 6.99 – 8.85 mg/kg (available phosphorus), 8.23 – 12.60 mg/kg (total hydrocarbon content), 76.48 – 100.25 mg/kg (chloride), 5.14 – 7.59 mg/kg (ammonium), 8.83 – 8.95% (clay), 2.70 – 3.10% (silt), 87.93 – 88.35% (sand), 2.62 – 3.58% (organic carbon), 4.51 – 6.16% (organic matter) and 0.22 – 0.33% (total nitrogen). Analysis of variance (ANOVA) showed no significant deviations (p>0.05) across the various distances for all parameters except for organic carbon and matter, total nitrogen, potassium and ammonium. In addition, most of the  nutrients showed positive significant relationship at p<0.05. This suggests that at large the activities of old landfill in the study area is not influencing the soil characteristics under study. Rather the apparent decline in value away from old landfill may be due to mobility level of minerals in the soil toward the southwest direction, which the cluster analysis clearly showed. Keywords: Physicochemical Properties, Environmental Contamination, Hydrocarbon Content, Landfill

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