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SRJIS/BIMONTHLY/ SUNIL PANDURANG GAWALI (2261-2271)
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AN OVERVIEW: SYNTHESIS AND APPLICATION OF SILVER
NANOPARTICALS
Sunil Pandurang Gawali
Assistant Professor, Department of Chemistry, Sundarrao More (Sr.) college of Art’s,
Commerce and Science, Poladpur Raigad 402303
Abstract
In recent years, nanoparticles of noble metals such as gold, silver and palladium have drawn
immense attention due to the wide range of new pplications in various fields of industry. Particularly,
silver nanoparticles have significant interest in medical applications such as very effective
antibacterial agents without the toxic effects, and industry application such as catalyst and inkjet inks
containing well uniform dispersions of nano-sized silver particles that are useful for producing
electronic circuits. It is important that the silver nanoparticles require not only the particles to be of
nano-size, but also synthesis of the nanoparticles to be produced easily and at low cost. Over the past
few decades, many synthetic methods of silver nanoparticles have been studied. Two main methods
for Silver nanoparticles are the physical and chemical methods. The problem with these methods is
absorption of toxic substances onto them. Green synthesis approaches overcome this limitation.This
paper aims to review different synthesis routes of silver nanoparticles and their applications. In
particular, we mainly present several chemical and biosynthesis approaches to preparing silver
nanoparticles and their properties as well as applications based on our recent studies.
Keywords: Sliver Nanoparticles, Synthesis, Physical method , Applications, biosenser.
Scholarly Research Journal's is licensed Based on a work at www.srjis.com
4.194, 2013 SJIF© SRJIS 2014
1.Introduction
Nanotechnology is the science which deals in materials in the range of 1 to 100 nm.
Nanomaterials have great importance as the physico-chemical properties of the metal are
changed as it reaches the nano size, their properties are different as compared to the bulk
metal. These nanomaterials have multiple applications in various fields such as electronics,
cosmetics, coatings, packaging, and biotechnology. Due to their optical properties the
colloidal solution of metal nanomaterials is transparent, thus they are useful in cosmetics,
coatings, and packaging. Among metal nanoparticles, silver nanoparticle has wide application
in industry and medicine due to its antibacterial, antifungal, larvicidial and anti-parasitic
characters. Because of their wide applications beneficial to humans there is a need to develop
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rapid and reliable experimental protocols for the synthesis of silver nanoparticles. Different
types of nanoparticles such as Ag, Au, Pt and Pd have been synthesized in the recent past by
chemical, physical and biological methods. The chemical methods are the most popular but
the use of toxic chemicals during synthesis produces toxic by-products [1]. The physical
methods require large amount of energy to maintain high pressure and temperature required
for the reaction [2]. Thus the chemical and physical methods have their own limitations; these
are considered expensive and unsuitable for sustainable ecosystem [3]. The synthesis of silver
nanomaterials using biological entities is gaining momentum as; biological methods are
providing, nontoxic and environmentally acceptable “green chemistry” procedures. Physical
and photochemical methods to prepare nanoparticles are usually need the very high
temperature and vacuum conditions, and expensive equipment [4-5].
An application of AgNPs can be found use in electronics industry. For example, inks,
pastes and filler utilize AgNPs for their high electrical conductivity; molecular diagnostics
and photonic devices take advantage of the novel optical properties of AgNPs [6-7]. In the
manufacture of electronic circuits, sintering of nanoparticles is necessary to remove
dispersing agents for obtaining high electrical conductivity and can usually be accelerated by
heating. From an industrial point of view, it is necessary to develop simple and low-cost
processes to produce large quantities of silver nanoparticles. It is preferable to perform
sintering of nanopaticles at the lowest temperature possible[ 8-9]. Many approaches were
investigated, and microorganisms such as bacteria, yeasts, fungi, and algae were used in the
biosynthesis of metal nanoparticles[10-13].
In this research paper, we present different methods to prepare AgNPs and their
properties as well as applications. In particular, we describe several novel methods based on
our recent studies, which are successful in the synthesis of AgNPs with different properties
and their biomedical applications.
2. Syntheses of Silver Nanoparticles and Their Property
2.1. Physical Approach
In physical processes, metal nanoparticles are generally synthesized by evaporation
condensation, which could be carried out using a tube furnace at atmospheric pressure. The
source material within a boat centered at the furnace is vaporized into a carrier gas.
Nanoparticles of various materials, such as Ag, Au, PbS and fullerene, have previously been
produced using the evaporation/condensation technique [14]. However, the generation of
AgNPs using a tube furnace has several drawbacks, because a tube furnace occupies a large
space, consumes a great deal of energy while raising the environmental temperature around
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the source material, and requires a lot of time to achieve thermal stability. A typical tube
furnace requires power consumption of more than several kilowatts and a preheating time of
several tens of minutes to attain a stable operating temperature. Furthermore, silver
nanoparticles have been synthesized with laser ablation of metallic bulk materials in solution
[15]. One advantage of laser ablation compared to other conventional method for preparing
metal colloids is the absence of chemical reagents in solutions. Therefore, pure colloids,
which will be useful for further applications, can be produced by this method [35]. In
summary, the physical synthesis of AgNPs usually utilizes the physical energies to produce
AgNPs with nearly narrow size distribution. The physical approach can permit producing
large quantities AgNPs samples in a single process. This is also the most useful method to
produce AgNPs powder. However, primary costs for investment of equipment should be
considered.
2.2. Photochemical Approach
The photo-induced synthetic strategies have also been developed. For example,
Huang and Yang synthesized AgNPs via photoreduction of AgNO3 in layered inorganic clay
suspensions, which serves as stabilizing agent that prevent nanoparticles from aggregation.
Irradiation disintegrated the AgNPs into smaller size with a single mode distribution until a
relatively stable size and diameter distribution were achieved [16]. However, in this method,
the equipments with high cost and experimental environment are required.
2.3. Biological Approach
Recently, biosynthetic methods using naturally reducing agents such as
polysaccharides, biological microorganism such as bacteria and fungus or plants extract, i.e.
green chemistry, have emerged as a simple and viable alternative to more complex chemical
synthetic procedures to obtain AgNPs. Bacteria are known to produce inorganic materials
either intra- or extracellularly. This makes them potential biofactories for the synthesis of
nanoparticles like gold and silver. Particularly, silver is well known for its biotical properties.
A. R. Vilchis-Nestor et al. used green tea extract as reducing and stabilizing agent to produce
gold silver nanoparticles in aqueous solution at ambient conditions [17]. Moreover, K.
Kalishwaralal et al. reported the synthesis of AgNPs by reduction of aqueous Ag+ ions the
culture supernatant of Bacillus licheniformis [18]. The synthesized AgNPs are highly stable
and this method has advantages over other methods as the organism used here is a
nonpathogenic bacterium. The biological method provides a wide range of resources for the
synthesis of AgNPs, and this method can be considered as a method of nanoparticles
synthesis with advantages over conventional chemical routes of synthesis and as an
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environmentally friendly approach as well as a low cost technique. However, it is not easy to
obtain a large quantity of AgNPs by using biological synthesis.
2.4. Chemical Approach
Besides those approaches described above, chemical reduction is the most common
method because of its convenience and simple equipment. Control over the growth of metal
nanoparticles is required to obtain nanoparticles of small size with a spherical shape and
narrow distribution in diameter. It is well known that silver nanoparticles can be produced by
chemical reaction at low cost and in high yield. In this review we describe sevorious chemical
synthesis methods to prepare the silver nanoparticles mainly.
Generally, the chemical synthesis process of AgNPs in solution usually employs the
following three main components: (1) metal precursors, (2) reducing agents and (3)
stabilizing capping agents. The formation of colloidal solutions from the reduction of silver
salts involves two stages of nucleation and subsequent growth. It is also revealed that the size
and the shape of synthesized AgNPs are strongly dependent on these stages. Furthermore, for
the synthesis of monodispered AgNPs with uniform size distribution, all nuclei are required
to form at the same time. In this case, all the nuclei are likely to have the same or similar size,
and then they will have the same subsequent growth. The initial nucleation and the
subsequent growth of initial nuclei can be controlled by adjusting the reaction parameters
such as reaction temperature, pH, precursors, reduction agents (i.e. NaBH4, ethylene glycol,
glucose) and stabilizing agents (i.e. PVA, PVP, sodium oleate) [19].
3. Applications of Silver Nanoparticles
Silver nanoparticles are one of the most attractive nanomaterials for
commercialization applications. They have been used extensively as electronic products in
the industry, anti-bacterial agents in the health industry, food storage, textile coatings and a
number of environmental applications. As anti-bacterial agents, silver nanoparticles were
used for a wide range of applications from disinfecting medical devices and home appliances
to water treatment. Some of them discuss as follows ;
Catalytic activity
The catalytic activity of AgNPs is size dependent. The researchers have investigated
the reduction of Methylene Blue (MB) by NaBH4 using catalytic activity of the synthesized
AgNPs from the plant Guggulutiktham Kashayam [20]. Edison and Sethuraman had studied
the enhanced catalytic activity on the reduction of benzyl chloride by Acacia nilotica pod
mediated AgNPs modified glassy carbon electrode as compared to those of glassy carbon and
metallic silver electrode [21]. The photocatalytic degradation of methyl orange by Ulva
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lactuca mediated AgNPs were studied spectrophotometrically under visible light illumination
[22]. The degradation of methylene blue by AgNPs using Gloriosa superba extract were also
reported [23]. Waghmode et. al. synthesized AgNPs using Triticum aestivum extract and
reported that AgNPs are excellent nano catalyst in reduction of hydrogen peroxide [24]. The
plant extract mediated AgNPs are also been employed for degradation of 4-nitrophenol (4-
NP) to 4-aminophenol (4-AP) [25].
Biosensors
The plasmonic properties AgNPs are greatly depend on its size, shape and dielectric
medium that surrounds it [26]. Therefore this dependency may lead to applicability of AgNPs
in biosensing. The different shaped AgNPs are incorporated in biosensors for sensing the
different interactions. Haes and Van fabricated triangular AgNPs by nanosphere lithography
and coated on glass substrate. These surface coated nano biosensor was used to detect
interactions between biomolecules, such as biotin-streptavidin [27] and two biomolecules
related to Alzheimer’s disease [28]. The cubical [29] or rhombohedral [30] silver
nanoparticles were also used for sensing of protein interactions. Lately, the reports are
available for AgNPs based biosensors in cancer detection [31]. The researcher have also
demonstrated the use of silica-coated nanosilver biosensors for the detection of bovine serum
albumin (BSA) [32].
Bioimaging
The AgNPs due to its plasmonic properties can be detected by numerous optical
microscopy techniques and are advantageous over commonly used fluorescent organic dyes
that decompose during imaging (photobleaching). As AgNPs are photostable thus they can
used as biological probes to monitor continuously dynamic events for an extended period of
time [33]. Lee et al. demonstrated the real time study of AgNPs to monitor early embryonic
developement with time.
Water purification
The AgNPs can be employed for purification in water filtering apparatus which may
be due to its enhanced antimicrobial nature [34]. Silver nanotechnology can be used in water
purification systems as world health organization (WHO) approved [35]. Preventing the
growth of harmful microorganisms by modifying or coating the surfaces with antimicrobial
agents has received much consideration for application in biomedical devices and health as
well as in the food and hygiene industries. Antimicrobial coatings should possess
antibacterial efficacy, ease of fabrication along with low toxicity. Silver and silver containing
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surfaces have been widely used as antimicrobial coatings [34,35]. But continuous exposure of
these agents might leads to the increased occurrence of resistance to treatment.
Medical devices
Wound dressing: AgNPs find tremendous use in topical ointments as well as creams used to
prevent wounds, burns and infections [36]. AgNPs are extensively used in medical devices
and implants. Additionally they are also added to consumer products such as colloidal silver
gel and silver-embedded fabrics which are now used in sporting equipment [37]. Silver
coated biomedical devices [38], implants [39], textile fibres [40] are employed for the
treatment of wounds or burns and glass windows and other surfaces to maintain sanitization
and hygienically conditions. Metallic AgNPs are effective microbicidal so they have received
significant consideration in multiple products ranging from paints to textiles.
Catheters: The plastic catheters are coated by bioactive AgNPs.The researchers have
developed a coating method which yielded a thin(∼100 nm) layer of nanoparticles of silver
on the surface of the catheters. The nanoparticles coated catheters are biocompatible as they
are nontoxic and have tendency to release specific and sustained release of silver at the
implantation site [41]. The infection risk is highly reduced in these catheters due to
significant in vitro antimicrobial activity by the inhibition of biofilm formation using
Escherichia coli, Enterococcus, Staphylococcus aureus, coagulase-negative staphylococci,
Pseudomonas aeruginosa and Candida albicans [42].
Bone cement: AgNPs with additive poly(methyl methacrylate) (PMMA) has been used as a
bone cement [43]. Such bone cements are anitibacterial due to presence of AgNPs. These
bone cements are known to have effective antibacterial agents against methicillin-resistantS.
epidermidis and S. aureus and showed retarded biofilm growth [43].
The biocompatibility of these bone cement were demonstrated against mouse fibroblasts or
human osteoblasts having very low cytotoxicity,suggesting good biocompatibility [43].
Antibacterial
There is a demand for an alternative antibacterial treatment due to the development of
antibiotic resistance among bacteria [44]. The AgNPs exhibit excellent bactericidal action
against both Gram-positive Gram-negative bacteria [45].
Antifungal
The literarture revealed that AgNPs are effective against C. glabrata, C. albicans, C.
krusei, C. parapsilosis and T. mentagrophytes effectively. Recently studies showed that the
Tulsi (Ocimum sanctum L.) mediated AgNPs exhibited antifungal activity against a
opportunistic
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human fungal pathogen [46]. Hence AgNPs is considered as potent and a fast-acting
fungicide against broad spectrum of common fungi including Aspergillus, Candida and
Saccharomyces.
Antiviral
The cytoprotective properties of silver is well known and has been employed for the
prevention of HIV interaction to the host cells [47]. AgNPs can also be used to prevent
infection after surgery and acting as anti-HIV-1 agents [48].
Recently, inkjet technology has been used to produce flexible electronic circuits at
low cost, and many studies regarding this application have been reported in recent years [49-
51]. To fabricate flexible electronic displays via inkjet printing, it is necessary to develop
suitable inks. Nano-sized metal particles such as Au or Ag are useful for producing electronic
circuits because of the uniformity of the small metal particles dispersed in the inks and their
high electrical conductivity. For example, using our methods described above, AgNPs with
small size and uniform can be prepared easily, and have high electrical conductivity,
indicating that they are useful for producing electronic circuits.
4. Conclusion:
In this review, we discuss the different methods to prepare AgNPs and their properties
as well as applications are presented. In particular, several novel chemical methods based on
our recent studies are described, which are successful in the synthesis of AgNPs.
Chemical and physical methods of silver nanoparticle synthesis were being followed
over the decades, but their formation was found to be expensive and the use of various toxic
chemicals for their synthesis makes the biological synthesis the more preferred option. In
spite, bacterial, fungal and plant extract sources can be used for nanosilver synthesis; this
type of formation is very easy, reliable and nontoxic in nature. Different methods are
suggested for nanoparticle synthesis; the chemical reduction method and biological synthesis
method were widely studied due to its advantage in controlling particle size and morphology
very effectively. The reducing agents in chemical reduction method are chemical solutions
such as polyol, N2H4, NaBH4, sodium citrate and N, N-dimethyformamide; in the case of
biological methods, collection of enzymes, predominantly, nitrate reductase plays such a role.
In the case of chemical synthesis methods, a stabiliser (surfactant) is added to the first
solution to prevent the agglomeration of silver nanoparticles, whereas in biological synthesis
there is no need to add a stabilising agent. Environmental pollution is a disadvantage of the
chemical method and the chemical reduction methods are energy-intensive. Biological
synthesis methods are carried out in environmental conditions and they are safe enough, and
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consume no energy. Although the time required to synthesise AgNPs is longer compared to
chemical methods; in fact, the synthesis time has recently reduced with finding suitable
organisms. Bio reduction of metal ions by combinations of biomolecules found in the extracts
of some of the organisms is environmentally benign, but chemically, it is complex. Here, we
report that the silver nanoparticles synthesised from biological means are showing better
antimicrobial activity against the pathogenic bacteria comparatively with the chemical
synthesis. Especially, we are focusing on fungi because they are the ideal sources in the
synthesis of metal nanoparticles because of their capacity to secrete large amount of enzymes.
Compared to other micro-organisms, fungal mycelial mesh can withstand flow pressure and
agitation, and other conditions in bioreactors or other chambers compared to plant materials
and bacteria. This green synthesis approach towards the synthesis of silver nanoparticles has
gaining demand in the field of nanotechnology. These nanoparticles with biocompatibility
and antimicrobial potency may be exploited for several biomedical applications including
development of catheters, topical antimicrobial gel formulations, food packaging ingredients,
food processing equipments and so on. In coming generations, silver nanoparticles will be
used as a potential tool to combat against rapidly increasing antibiotic resistance.
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ANALYSIS OF SOIL QUALITY USING PHYSICO-CHEMICAL PARAMETERS OF
CHARAI VILLAGE, TAHSIL-POLADPUR RAIGAD (M.S).
Sunil Pandurang Gawali
Assistant Professor. Department of Chemistry, Sundarrao More (Sr.) college of Art’s
Commerce and Science, Poladpur Raigad 402303
In the present study the analysis of soil samples collected from the rice filed of At Charai village,
Tahsil-Poladpur Raigad (M.S). In the first place soils samples from 10 representative locations were
collected for their analysis of Physical parameters like PH, Electrical Conductivity(EC),Total
Organic Carbon, Available Nitrogen (N), Available Phosphorus (P2O5) and available Potassium
(K2O) were anlyzed. . These studies lead us to the conclusion of the nutrient's quanity of soil of
Lunawada Taluka. Result show that overage the Charai village, Tahsil-Poladpur Raigad have various
parameter like EC, PH, OC,N,P,K. This information will help farmers to decide the problems related
to soil nutrients amount of fertilizers to be added to soil to make production economic.
Keywords: Soil, physic-chemical parameters, pH, Conductivity, Organic Carbon.
1.0 INTRODUCTION
The soil forms the intermediate zone between the atmosphere and the rock cover of
the earth, the lithosphere. It also forms the interface between water bodies (hydrosphere) and
the lithosphere and thus forming a part of biosphere. The soil may be defined as the
uppermost weathered layer of the earth’s crust in which are mixed organisms and products of
their death and decay. It may also be defined as the part of the earth’s crust in which plants
are anchored. The soil is a complex organization being made up of some six constituents’
namely inorganic matter, organic matter, soil organisms, soil moisture, soil solution and soil
air. Roughly, the soil contains 50-60% mineral matter, 25-35% water, 15-25% air and little
percentage of organic matter. Soil is important everyone either directly or indirectly. It is
natural body on which agricultural product grow and it has fragile ecosystem [1,2] Soil are
medium in which crop grow to food and cloth the world. Soil fertility vital to a productive
soil. Certain external factors control plant growth, air, temperature, light mechanical support,
nutrients and water. Plants had elements for their growth and completion of life cycle. They
are carbon, hydrogen, oxygen, nitrogen, phosphorus, potassium, etc [3].
Abstract
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Soil sampling is perhaps the most vital step for any soil analysis. As a very small
fraction of the huge soil mass is used for analysis, it becomes extremely important to get a
truly representative soil sample of the field. Soil test based nutrient management has emerged
as a key issue in efforts to increase agricultural productivity and production since optimal use
of nutrients, based on soil analysis can improve crop productivity and minimize wastage of
these nutrients, thus minimizing impact on environmental leading to bias through optimal
production [4]
The status of available micronutrients in soils and their relationship with various
physico-chemical properties have been attempted by several investigators [6-7]. Investigation
of someparameter and Nutrients from Soil samples of Rice field by Jadhav S. D. et.al .but the
investigation of nutrients andparameters of Soil of Rajura Bazar village in Warud Tahsil of
Amravati district in Maharashtra.
Present study is an attempt to find out the nutrient's quantity in soil At Charai village,
Tahsil-Poladpur Raigad (M.S). This information will help farmers to decide the amount of
fertilizer to be added to soil to make the production economic. The objective of this paper
was to analyze the trend in PH, EC,OC, N,P, K status of soils of Charai village, Tahsil-
Poladpur Raigad (M.S).
2.0 Materials and Methods:
2.1 Study Area:
The soil samples were collected from the area Charai village, Tahsil-Poladpur Raigad.
The Charai is located on the western ghat in Maharastra State of India. It lies between
17.9855910
north latitude and 73.466735o east.
2.2 Soil sampling
Soil samples were collected randomly at 0 to 20 cm depths with ten plots, ten samples
from each plot, respectively. In well sterilise polythene pouches.
Soil sample were collected from following Farmers fields
1. Sample 1(R-1) was collected from Mr. Raju Utekar Rice field.
2. Sample 2 (R-2) was collected from Mr Salvi S. Rice field.
3. Sample 3(R-3) was collected from Mr. Bhima Utekar Rice field.
4. Sample 4 (R-4) was collected from Mr. shailar C. Rice field.
5. Sample 5 (R-5) was collected from Mr. Jagtap K. Rice field.
6. Sample 6 (R-6)) was collected from Mr. Salvi V. Rice field.
7. Sample 7 (R-7) was collected from Mr. Salvi J. Rice field
8. Sample 8 (R-8) was collected from chavan C, Rice field
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9. Sample 9 (R-9) was collected from Utekar M Rice field
10. Sample 10 (R-10) was collected from Chittibabu G. Rice field
2.3 Sample Preparation –
The soil samples were air dried for a period of one week, ground with a clean
porcelain mortar and pestle and passed through a 2.0 mm sieve. Sieved samples were mixed
and stored for subsequent physical, chemical analysis.
In laboratory these samples were analyzed for different chemical parameters
following standard methods [9]. AR grade reagents and double distilled water were used for
soil analysis. The collected samples were analyzed for major Physical and Chemical quality
parameter like PH, Electrical Conductivity (EC), and Organic Carbon (OC), Nitrogen (N), K
and P analysis by standardmethod (DIRD Pune 2009).
Methods uses for estimation of various parameters are -
1. Determination of Moisture: by Weighting Method.
2. Determination of pH: by Digital pH Meter
3. Determinationof of Electric Conductance: by Conductometer
4. Determination of Organic Carbon: by Titration Method
5. Determination of Nitrogen (N): by Titration Method
6. Determination of Phosphorous (P): by Titration Method
7. Determination of Pottasium (K): by Flame Photometry
8. Determination of Colour Of Soil ; by Viewing soil
Results were compared with standard values [9] to find out low, medium or high
nutrient's content essential for STR.
3. RESULTS AND DISCUSSION:
1. Colour of Soil :
The all soil sample from R-1 to R-10 was Faint Reddish Brown in colour.
2. Moisture :
The moisture content value ranges from .2 % - 8.4 %. It is clear from the result
that soil sample R-5, R-6 and R-10 moisture which is high as compared to other
samples.
3. pH :
The most significant property of soil is its pH level, Its effects on all other
parameters of soil. Therefore, pH is considered while analysing any kind of soil. If the
pH is less than 6 then it is said to be an acidic soil, the pH range from 6-8.5 it’s a
normal soil and greater than 8.5 then it is said to be alkaline soil. pH was observe in
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the range 7.73 to 8.02. The All Soil sample from R-1 to R-10 are very slightly
alkaline sample.
4. Electrical conductivity :
Electrical conductivity is also a very important property of the soil, it is used
to check the quality of the soil. It is a measure of ions present in solution The
electrical conductivity of a soil solution increases with the increased concentration of
ions. Electrical conductivity is a very quick, simple and inexpensive method to check
health of soils. It is a measure of ions present in solution. The electrical conductivity
of a soil solution increases with the increased concentration of ions.
5. Organic Carbon :
Soil organic carbon is the basis of soil fertility. It release nutrient for plant
growth, promotes the structure, biological and physical health of soil, and is buffer
against harmful substances. Increasing soil organic carbon has two benefits- as well as
helping to mitigate climate change, it improves soil health and fertility. Many
management practices that increase soil organic carbon also improve crop and pasture
yields Organic carbon values were recorded in the range of 0.38 – 1.20 %.The soil
sample R-3 has more organic carbon ,sample R-5 R-6 and R-10 have moderate and
while sample R-1, R-2, R-4, R-7, R-8 and R-9 has very low percentage of organic
carbon.
6. Available Nitrogen :
Available nitrogen content in the soil sample ranged from 68 to 152 kg/hect.
The soil sample R-3 has good nitrogen content as compared to other all samples.
7. Phosphorous :
Phosphorus is a most important element present in every living cell. It is one
of the most important micronutrient essential for plant growth. Phosphorus most often
limits nutrients remains present in plant nuclei and act as an energy storage. 4.
Phosphorous content in the soil sample ranged between 35.4- 103.2 kg/hect. The soil
sample R-3 has only phosphorous content high as compared to all other samples.
8. Potassium :
Potassium plays an important role in different physiological processes of
plants; it is one of the important elements for the development of the plant. It is
involved in many plant metabolism reactions, ranging from lignin and cellulose used
for the formation of cellular structural components, for regulation of photosynthesis
and production of plant sugars that are used for various plant metabolic needs.
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Potassium content in the soil sample ranged between 112- 342 kg/hect. The soil
sample R-3 and R-10 have more potassium content as compared to other samples.
Table 1. Physicochemical Parameters of Soil Samples
Sr
.
No
.
Parameter
s R-1 R-2 R-3 R-4 R-5 R-6 R-7 R-8 R-9 R-10
1 colour
Reddi
sh
Reddi
sh
Reddi
sh
Reddi
sh
Reddi
sh
Reddi
sh
Reddi
sh
Reddi
sh
Reddi
sh
Reddi
sh
Brown Brown Brown Brown Brown Brown Brown Brown Brown Brown
2 pH 7.89 8.02 7.76 7.85 7.82 7.73 7.96 7.7 7.94 7.85
3
Electro
conductan
ce (ms)
0.342 0.42 0.45 0.56 0.634 0.554 0.432 0.756 0.43 0.48
4 Moisture
(%) 4.2 3.5 5.2 4.1 8.4 8.3 3.4 3.2 4.8 8.4
5
Organic
carbon
(%)
0.26 0.38 1.2 0.38 0.63 0.78 0.41 0.82 0.43 0.32
6 Nitrogen (kg/hect)
88 78 152 89 96 127 68 103 78 130
7
Phosphoro
us (kg/hect)
42.3 46.4 103.2 35.4 54.6 58.2 22.5 43.4 36.3 48.2
8 Potassium (kg/hect)
112 118 342 143 187 201 127 186 132 260
Figure 1: Number of samples of Charai villages Poladpur taluka lies in EC, PH,
moisture, OC, N, P, K
4. Conclusion:
The physicochemical parameters are important to agricultural for plant growth.
Maintenance or enhancement of soil quality is a more important criterion for analysis and
sustainability of soil ecosystems[10] From the results of the work, it can be concluded that
the pH of soil samples were slightly acidic, conductivity, organic carbon and NPK values of
0
50
100
150
200
250
300
350
400
R-1 R-2 R-3 R-4 R-5 R-6 R-7 R-8 R-9 R-10
pH
Electro conductance (ms)
Moisture (%)
Organic carbon (%)
Nitrogen (kg/hect)
Phosphorous (kg/hect)
Potassium (kg/hect)
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all soil samples were found to be very less. In all samples were in lower amount so fertilizers
containing were added for proper growth and development of crop.
5. ACKNOWLEDGEMENT
Thanks to Teaching & Non-teaching staff, Department of Chemistry, Sundarrao More
college of Art’s commerce and Science, Poladpur Raigad(M.S.) of their suggestions and co-
operation during the present work.
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Dr. Dalwadi M.R. Dr. Bhatt V.R. soil and water testing Anand, Gujarat India 2008
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