scholarly journals Research Note: Effect of tidal inundation on some chemical properties of soil of the Sundarbans (India)

2007 ◽  
pp. 137-147 ◽  
Author(s):  
Tanumi Kumar ◽  
Monoranian Ghose
Keyword(s):  
Ion Mobility ◽  
Inorganic Nitrogen ◽  
Chemical Properties ◽  
Soil Samples ◽  
Ammonium Ion ◽  
Available Phosphorus ◽  
Tidal Inundation ◽  
Chemical Parameters ◽  
Available Nitrogen ◽  
Properties Of Soil

Soil samples from twenty seven sites of Indian Sundarbans were analysed for some chemical parameters, These sites were divided into three inundation types namely, diurnal, usual springtide and summer springtide. The study demonstrated that most of the soil properties significantly varied with inundation type. Sites inundated by usual springtides exhibited lowest concentrations of pH, salinity (Sal), available phosphorus (I)), and exchangeable potassium (K), sodium (Na) and magnesium (Mg), whereas summer springtide inundated sites had the highest concentrations of Sal, organic carbon (OC), available nitrogen (N), Na, K and Mg. Highest level of P and lowest N in the diurnally inundated sites could be attributed to increased mobility of phosphates and denitrification or volatilization losses of inorganic nitrogen in the soils respectively, Highest concentration of in summer springtide inundated sites could be attributed to increased ammonium ion mobility in the soils.

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 on Physico-chemical Properties and Fertility Status of Tumkur District (Zone-4) of Karnataka

2020 ◽  
pp. 42-47
Author(s):  
A. H. Kumar Naik ◽  
B. M. Madhu ◽  
Parashuram Chandravamshi ◽  
M. Hanumanthappa
Keyword(s):  
Nitrogen Content ◽  
Chemical Properties ◽  
Soil Samples ◽  
Available Nitrogen ◽  
Fertility Status ◽  
Physico Chemical ◽  
Natural Farming ◽  
Properties Of Soil

A study was conducted to an assessment of physico-chemical properties of soil of Chikknayakana Hally (CNH), Koratigere (KTG), Madhugiri (MDG) Pavagada (PVG), Sira and Tiptur (TPT) taluks of Tumkur district was carried out in 2018-2019 under natural farming. The main objectives of this study was to carried out the survey, collection of information and analysis of chemical properties of soil. Totally 952 soil samples were collected at a depth of 0-15 cm and the study revealed that pH ranged 3.70-7.50 acidic to neutral, and EC is slightly saline in nature. Available nitrogen content ranged from 46.5-657.1 kg ha-1, phosphorus from 5.4-267.7 kg ha-1and potassium status in soils of different taluks ranged from 17.25 to 667 kg ha-1. Maximum soil samples of the area showed sufficient in manganese, Cu and Fe status, but Zinc and boron were deficient.

scholarly journals STUDY AND ESTIMATION OF THE RATIO OF 137CS AND 40K SPECIFIC ACTIVITIES IN SANDY AND LOAM SOILS / 137CS IR 40K SAVITŲJŲ AKTYVUMŲ SANTYKIŲ TYRIMAS IR VERTINIMAS PRIESMĖLIO IR PRIEMOLIO DIRVOŽEMYJE

2011 ◽  
Vol 3 (5) ◽  
pp. 37-42
Author(s):  
Renata Mikalauskienė ◽  
Donatas Butkus ◽  
Ingrida Pliopaitė Bataitienė
Keyword(s):  
Chemical Properties ◽  
Dry Weight ◽  
Soil Samples ◽  
Physical And Chemical Properties ◽  
Nuclear Testing ◽  
Specific Activities ◽  
Physical And Chemical ◽  
Chernobyl Nuclear Plant ◽  
Properties Of Soil ◽  
And Chemical Properties

The present article describes changes in specific activities and fluctuations in the ratio of natural 40K and artificial 137Cs radionuclides in soil samples taken from different places of Lithuanian territory. The samples of soil have been selected from the districts polluted after the accident in Chernobyl nuclear plant performing nuclear testing operations. The study has established the main physical and chemical properties of soil samples and their impact on the concentration of 40K activities. 137Cs/40K specific activities in soil have been observed under the dry weight of the sample that varied from 0.0034 to 0.0240. The results of the study could be used for establishing and estimating 137Csand 40K transfer in the system “soil-plant”. Santrauka Straipsnyje nagrinėjama gamtinės (40K) ir dirbtinės (137Cs) kilmės radionuklidų savitųjų aktyvumų ir jų santykio kaita skirtinguose Lietuvos teritorijos dirvožemiuose. Dirvožemio mėginiai parinkti iš vietovių, kurios buvo labiau užterštos po Černobylio atominės elektrinės avarijos ir buvusių branduolinių bandymų. Tyrimo metu nustatytos pagrindinės fizinės cheminės dirvožemio savybės ir jų poveikis 40K aktyvumų koncentracijai. 137Csir 40K savitieji aktyvumai dirvožemyje tirti esant sausam mėginio svoriui. 137Cs savitieji aktyvumai sausame dirvožemyje svyravo nuo 1,1±1,0 iki 14,3±0,9 Bq/kg, o 40K savitieji aktyvumai – nuo 326±29 iki 740±15 Bq/kg. 137Csir 40K savitųjų aktyvumų santykis skirtingų vietovių dirvožemiuose kito nuo 0,0034 iki 0,0240 Bq/kg. Tyrimo rezultatai gali būti panaudoti, nustatant ir įvertinant 137Csir 40K pernašą sistemoje dirvožemis–augalai.

scholarly journals Effect of Tillage System and Organic Matter Management Interactions on Soil Chemical Properties and Biological Activity in a Spring Wheat Short-Time Cultivation

Energies ◽  
2021 ◽  
Vol 14 (21) ◽  
pp. 7451
Author(s):  
Barbara Breza-Boruta ◽  
Karol Kotwica ◽  
Justyna Bauza-Kaszewska
Keyword(s):  
Organic Matter ◽  
Biological Activity ◽  
Organic Carbon ◽  
Spring Wheat ◽  
Chemical Properties ◽  
Soil Samples ◽  
Available Phosphorus ◽  
Organic Carbon Content ◽  
Tillage System ◽  
Short Time

Properly selected tillage methods and management of the available organic matter resources are considered important measures to enable farming in accordance with the principles of sustainable agriculture. Depending on the depth and intensity of cultivation, tillage practices affect soil chemical composition, structure and biological activity. The three-year experiment was performed on the soil under spring wheat (cv. Tybalt) short-time cultivation. The influence of different tillage systems and stubble management on the soil’s chemical and biological parameters was analyzed. Organic carbon content (OC); content of biologically available phosphorus (Pa), potassium (Ka), and magnesium (Mg); content of total nitrogen (TN), mineral nitrogen forms: N-NO3 and N-NH4 were determined in various soil samples. Moreover, the total number of microorganisms (TNM), bacteria (B), actinobacteria (A), fungi (F); soil respiratory activity (SR); and pH in 1 M KCl (pH) were also investigated. The results show that organic matter amendment is of greater influence on soil characteristics than the tillage system applied. Manure application, as well as leaving the straw in the field, resulted in higher amounts of organic carbon and biologically available potassium. A significant increase in the number of soil microorganisms was also observed in soil samples from the experimental plots including this procedure.

scholarly journals Evaluation of Physicochemical Properties and Microbial Populations of Soil of Bagale Forest Reserve, Girei Local Government Area, Adamawa State, Nigeria

2020 ◽  
pp. 13-21
Author(s):  
G. O. Ateh ◽  
M. G. Saka ◽  
E. E. Dishan ◽  
B. B. Meer
Keyword(s):  
Local Government ◽  
Physicochemical Properties ◽  
Soil Depth ◽  
Chemical Properties ◽  
Soil Samples ◽  
Local Government Area ◽  
Microbial Populations ◽  
Available Phosphorus ◽  
High Porosity ◽  
Forest Reserve

This study evaluated the relationship between selected physicochemical properties and microbial populations of the soil of Bagale Forest Reserve, Girei Local Government Area of Adamawa State, Nigeria. Five plots of 20 x 20 m were laid. Soil samples were collected from five different positions at two soil depths of 0-15 cm and 15-30 cm. The soil samples were isolated in the laboratory for microbial populations and determination of physical and chemical properties. The results obtained revealed that fungal population (7.65 x 105 cfu/ml) was the highest at the soil depth of 0-15 cm, representing 39% of the total microbial populations in the sampled soil of the study area. The results further revealed that the population (6.84 x 105 cfu/ml) of the bacteria had a positive effect on soils of the study area in terms of nitrogen fixation by Rhizobacterial spp. Chemical properties of the soil samples revealed that the available phosphorus exhibited the highest percentage (61.7%) at 0-15 cm soil depth. Analyses of soil physical properties recorded the highest percentage (49.0%) of sand at 0-15 cm soil depth. A similar percentage (50.0%) of sand was exhibited at the depth of 15-30 cm. These percentages accounted for the high porosity (29.0%) of the soil observed at the two soil levels in the study area and could be improved through the application of lime fertilizers. Application of appropriate fertilizers like NPK to improve the soil condition of the study area is highly recommended.

scholarly journals Physico-Chemical Analysis of Mangrove Soil, Kundapura, Karnataka, India

2020 ◽  
Vol 15 (3) ◽  
pp. 624-631
Author(s):  
Vijaya Kumar Kallushettihalli Mallappa ◽  
Vijaya Kumara
Keyword(s):  
Electrical Conductivity ◽  
Soil Analysis ◽  
Periodic Variation ◽  
Soil Samples ◽  
Phosphorus Concentration ◽  
Available Phosphorus ◽  
Available Nitrogen ◽  
Mangrove Soil ◽  
Physico Chemical ◽  
Nitrogen Phosphorus

The present study was carried out to determine the periodic variation in physico-chemical characteristics of mangrove soil samples. The soil samples had been accrued from four distinctive places of Kundapura mangrove areas in three seasons, monsoon, pre-monsoon and post-monsoon. Soil analysis pertaining to various variables such as total Nitrogen, Phosphorus, Potassium, pH and Electrical conductivity. Soil pH is assorted from 3.84 to 6.66. Electrical conductivity is assorted from 0.02 dSm-1 to 9.60 dSm-1. Available nitrogen is assorted from 30.7 kg/ha to 323 kg/ha. Available phosphorus concentration has ranged between 1.37 kg/ha and 47.27 kg/ha. Available potassium is differed from 117.43 kg/ha to 537.63 kg/ha. The results confirmed variations in all of the analyzed parameters of the soils amassed from four stations.

scholarly journals Does the Mixture of Species change the C:N:P Ecological Stoichiometric Characteristics of fine Roots? A Case Study of Cupressus Funebris Mixed Forest

2021 ◽  
Author(s):  
Wenchun He ◽  
Yang Wang ◽  
Xiaochen Wen ◽  
Yu Wang ◽  
Baoru Xiao ◽  
...  
Keyword(s):  
Fine Roots ◽  
Environmental Changes ◽  
Mixed Forest ◽  
Chemical Properties ◽  
Available Phosphorus ◽  
Biological Factors ◽  
Nitrogen And Phosphorus ◽  
Mixed Stands ◽  
Available Nitrogen ◽  
Low Efficiency

Abstract The growth of fine roots of trees is affected by environmental changes and biological factors. At present, there have been many researches on the physiological plasticity of fine roots caused by environmental changes, but there are still few studies on the influence of biological factors on fine roots. This paper focused on the contents of carbon (C), nitrogen (N), and phosphorus (P), and their ecological stoichiometric ratios in different root orders of Cupressus funebris fine roots in 11 mixed stands with Koelreuteria paniculate or Toona sinensis at different ratios, and the effects of soil physical and chemical properties on the root chemical properties. It aimed to provide new insights into the fine-root nutrient distribution pattern and the transformation or reconstruction of low-efficiency pure forests from the standpoint of forest types. The results showed that: soil pH, and the content of available nitrogen (SAN), available phosphorus (SAP) and available potassium (SAK) differed significantly in the tested mixed forest stands. No significant differences in carbon content of fine roots were observed in different mixed stands. The content of nitrogen and phosphorus in fine roots in mixed forests showed heterogeneity. Species mixing changed the C/N, C/P and N/P of the C. funebris compared the pure stands. The "T. sinensis + C. funebris" forest alleviated the limitation of the lack of phosphorus on fine roots of C. funebris on. The principal component analysis showed that mixed stands of "T. sinensis + C. funebris" had the highest comprehensive score at ratio of "3:1". Thus, our results recommended the adoption of T. sinensis, especially at 75%, to reconstruct the low-efficiency pure C. funebris forest.

scholarly journals Soil Chemical Properties under Conservation Agriculture and Cereal-Based Cropping System in Eastern Tarai of Nepal

2020 ◽  
Vol 6 ◽  
pp. 115-126
Author(s):  
Shukra Raj Shrestha ◽  
Jiban Shrestha ◽  
Sanjeet Kumar Jha ◽  
Dinesh Khadka ◽  
Prakash Paneru ◽  
...  
Keyword(s):  
Chemical Properties ◽  
Cropping System ◽  
Conservation Agriculture ◽  
Conventional Tillage ◽  
Soil Samples ◽  
Kidney Bean ◽  
Soil Chemical Properties ◽  
Available Phosphorus ◽  
Zero Tillage ◽  
Total N

Field experiments were conducted for four years (2014-2017) at five locations namely Salbani, Bhokraha, Simariya, Bhaluwa and Kaptanganj of Sunsari district to assess the changes in soil chemical properties under conservation agriculture (CA)-based practices in two cropping systems namely rice-kidney bean-maize at Salbani and rice-wheat at rest of the locations. In rice-wheat cropping system, there were four treatments: (1) conventional tillage (CT) for rice transplantation and subsequent wheat sowing, (2) conventional tillage rice transplantation followed by zero tillage (ZT) wheat, (3) unpuddled rice transplantation followed by zero tillage wheat, (4) zero tillage in both rice and wheat. Similarly, in rice-kidney bean-maize cropping system, there were four treatments; (1) conventional tillage for rice transplantation and sowing of both kidney bean and maize, (2) conventional tillage rice transplantation followed by zero tillage in both kidney bean and maize, (3) unpuddled rice transplantation followed by zero tillage in both kidney bean and maize, (4) zero tillage in all three crops. Soil samples were taken at initial and every year after rice harvest.The soil samples were analyzed for total nitrogen, available phosphorus, available potassium, pH and soil organic matter.Total nitrogen (N) showed a slightly decreasing trend in the first three years and showed a slight increase at the end of experiment under ZT in all locations. The total N under ZT changed from 0.12 to 0.13%, 0.05 to 0.06%, 0.10 to 0.12%, 0.11 to 0.08% and 0.09 to 0.13% in Salbani, Bhokraha, Simariya, Bhaluwa and Kaptanganj, respectively.  All locations showed the positive values of available potassium; Salbani  revealing considerable change of 64.3 to 78.5 mg/kg in CT while 68.4 to 73.3 mg/kg in ZT condition. The treatment where rice was transplanted in unpuddled condition and zero tilled to wheat, had a mean value of available phosphorus and potassium as 87.3 and 81.9 mg/kg respectively. Soil pH ranged from 4.8 to 7.1 in CT while it was 5.2 to 6.8 in ZT across the locations. The change in soil organic matter in CT of all locations except Salbani was narrower as compared to ZT.

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