scholarly journals Soil Microbes are Shaped by Soil Physico-chemical Properties: A Brief Review of Existing Literature

2021 ◽  
pp. 59-71
Author(s):  
Debarshi Dasgupta ◽  
G. P. Brahmaprakash
Keyword(s):  
Land Use ◽  
Biological Activity ◽  
Soil Properties ◽  
Soil Microbes ◽  
Chemical Properties ◽  
Ecosystem Processes ◽  
Physico Chemical ◽  
Chemical Properties Of Soils ◽  
Abiotic Controls ◽  
Structure And Functions

Soil consists of very complex, inter-related community of microorganisms which interact with one another and with plants and animals, forming a complex web of biological activity. The microbes determine health and potential of soil to perform a multitude of ecosystem processes, which depend on the community composition and functioning. The microbial community structure and functions in soil are influenced by physico-chemical properties of soils. Abiotic controls like surrounding climate, environment, land use, nutrients, pH and rhizosphere control the composition of microbes in soil, which in turn modify soil properties. In this review, we investigate the existing body of research exploring studies which have explored how microbes are shaped by soil properties.

scholarly journals Fruska gora mountainous environments - assessing the impact of geological setting and land use on soil properties

2016 ◽  
Vol 81 (4) ◽  
pp. 459-468
Author(s):  
Tamara Djordjevic ◽  
Milica Kasanin-Grubin ◽  
Gordana Gajica ◽  
Zorica Popovic ◽  
Rada Matic ◽  
...  
Keyword(s):  
Land Use ◽  
Soil Properties ◽  
Land Management ◽  
Land Degradation ◽  
Chemical Properties ◽  
Rock Composition ◽  
Geological Setting ◽  
Management Actions ◽  
Physico Chemical ◽  
The Impact

On a global scale, it has been found that in the last decades the surface of the vulnerable land and land affected by degradation is increasing and that unsustainable land management is one of the key drivers of land degradation. In order to assess the effect that these changes have on biodiversity and ecosystem services, and to carry out the appropriate planning and management actions for conserving the environment it is essential to identify and quantify changes caused by land degradation. The aim of this study was to determine the impact of geological setting i.e. type of bedrock, and land use on soil physico-chemical properties in vulnerable mountainous areas of Fruskagora. For the purpose of this study the total of 30 soil samples at 0-20 cm depth were collected at four locations on the Fruskagora Mt. Geological setting was serpentinite and marl and land cover was forest and meadow. Following soil properties were determined: pH, redox potential (Eh), electrical conductivity (EC), total dissolved solids (TDS), concentrations of available cations Ca, Mg, K, Na, contents of organic carbon (Corg) and nitrogen (N). The correlation between the obtained parameters was tested with two-way ANOVA and Principal Component Analyses (PCA). All of the obtained results indicate that the soil physico-chemical properties depend on geological setting and that rock composition has to be taken into consideration during land management.

scholarly journals Studying soil erosion by evaluating changes in physico-chemical properties of soils under different land-use types

2021 ◽  
Vol 20 (3) ◽  
pp. 190-197
Author(s):  
Emre Babur ◽  
Ömer Süha Uslu ◽  
Martín Leonardo Battaglia ◽  
Andre Diatta ◽  
Shah Fahad ◽  
...  
Keyword(s):  
Land Use ◽  
Soil Erosion ◽  
Chemical Properties ◽  
Physico Chemical ◽  
Land Use Types ◽  
Chemical Properties Of Soils

scholarly journals Determination of Physico-chemical Properties in Soil Samples of Prayagraj (Allahabad) District, Uttar Pradesh, India

2019 ◽  
pp. 1-8 ◽  
Author(s):  
Chahat Verma ◽  
Abhinav Lal ◽  
Alec D. M. David ◽  
P. Smriti Rao
Keyword(s):  
Land Use ◽  
Organic Carbon ◽  
Chemical Properties ◽  
Uttar Pradesh ◽  
Soil Samples ◽  
Average Value ◽  
Physico Chemical ◽  
Chemical Properties Of Soils ◽  
Water Holding

Physico-chemical properties of soils from different land use systems viz. agriculture, olericulture, horticulture etc in Prayagraj (Allahabad) Uttar Pradesh were analyzed in 2018-19. Samples were collected from 4 different sites of Allahabad district viz., ECC gaughat, Jhunsi, Karchhana & Subedarganj having distance between them of at least 4 kms. Some soils samples had higher water holding capacity & value of organic carbon. They have average value of pH and EC as compared to the cultivated soils. Potassium was found to be of low content in soil samples. Physical properties and parameters for all soils were average or medium whereas as variation in chemical properties were observed.

Dynamics in physico–chemical properties of soils under oil palm plantations of different ages

2021 ◽  
pp. 118-124
Author(s):  
Olufemi Adewale Osinuga
Keyword(s):  
Soil Properties ◽  
Oil Palm ◽  
Sandy Loam ◽  
Chemical Properties ◽  
Soil Surface ◽  
Available Phosphorus ◽  
Physico Chemical ◽  
Different Ages ◽  
Research Findings ◽  
Chemical Properties Of Soils

This research investigated the changes in the physicochemical properties of soils under oil palm plantations of different ages. Soil surface (0-20 cm) and subsurface (20-40 cm) samples have been obtained from various ages of oil palm plantations (0-5, 5-10, 10-15 and, 15-20 years). Two distinct samples were taken on the same farm, under alleys and heaped pruned fronds. Soil samples used as a standard (control) were collected from adjacent forest land. Analyses of particle size showed that the soils were sandy loam to sandy clay loam texture soils. Bulk density was low to moderate (0.93 – 1.25 g/cm3), and varied with age and depth. The soils were moderate to neutral pH (5.38 – 6.81), low to moderate organic carbon (11.6 – 21.7 g/kg) and total nitrogen (1.18 – 2.03 g/kg), and relatively low available phosphorus (4.43 – 6.21 mg/kg) contents. Based on the standard ratings, cation exchangeable capacity content was low (4.93 – 6.15 cmol/kg), while high percent base saturation (85.3 – 93.2%) was observed. The soil properties determined showed that soil nutrients under alleys fluctuated with age whiles that under heaped fronds increased. Research findings have shown that the soil properties of different ages of oil palm plantations vary and should be handled differently based on their characteristics. Accumulation of organic residue on the floor of the plantations should be encouraged as this will help increase organic matter levels.

scholarly journals Silver Nanoparticles Stabilized with Phosphorus-Containing Heterocyclic Surfactants: Synthesis, Physico-Chemical Properties, and Biological Activity Determination

Nanomaterials ◽  
2021 ◽  
Vol 11 (8) ◽  
pp. 1883
Author(s):  
Martin Pisárčik ◽  
Miloš Lukáč ◽  
Josef Jampílek ◽  
František Bilka ◽  
Andrea Bilková ◽  
...  
Keyword(s):  
Silver Nanoparticles ◽  
Biological Activity ◽  
Zeta Potential ◽  
Chain Length ◽  
Alkyl Chain ◽  
Chemical Properties ◽  
Alkyl Chain Length ◽  
Microbial Pathogens ◽  
Physico Chemical ◽  
Phosphorus Containing

Phosphorus-containing heterocyclic cationic surfactants alkyldimethylphenylphospholium bromides with the alkyl chain length 14 to 18 carbon atoms were used for the stabilization of silver nanodispersions. Zeta potential of silver nanodispersions ranges from +35 to +70 mV, which indicates the formation of stable silver nanoparticles (AgNPs). Long-chain heptadecyl and octadecyl homologs of the surfactants series provided the most intensive stabilizing effect to AgNPs, resulting in high positive zeta potential values and smaller diameter of AgNPs in the range 50–60 nm. A comparison with non-heterocyclic alkyltrimethylphosphonium surfactants of the same alkyl chain length showed better stability and more positive zeta potential values for silver nanodispersions stabilized with heterocyclic phospholium surfactants. Investigations of biological activity of phospholium-capped AgNPs are represented by the studies of antimicrobial activity and cytotoxicity. While cytotoxicity results revealed an increased level of HepG2 cell growth inhibition as compared with the cytotoxicity level of silver-free surfactant solutions, no enhanced antimicrobial action of phospholium-capped AgNPs against microbial pathogens was observed. The comparison of cytotoxicity of AgNPs stabilized with various non-heterocyclic ammonium and phosphonium surfactants shows that AgNPs capped with heterocyclic alkyldimethylphenylphospholium and non-heterocyclic triphenyl-substituted phosphonium surfactants have the highest cytotoxicity among silver nanodispersions stabilized by the series of ammonium and phosphonium surfactants.

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