Index properties of soils

Part 1 book "Geotechnical engineering - Principles and practices of soil mechanics and foundation engineering" includes content: Introduction, soil formation and characterization, soil phase relationships, index properties and classification, soil permeability and seepage, effective stress and pore water pressure, stress distribution in soils due to surface loads, compressibility and consolidation, shear strength of soil, soil exploration, stability of slopes, lateral earth pressure.

499p dianmotminh04 12-07-2024 0 0   Download

Part 1 of ebook "Geotechnical engineering (Revised third edition)" provides readers with content including: soil and soil mechanics; composition of soil terminology and definitions; index properties and classification tests; identification and classification of soils; soil moisture-permeability and capillarity; seepage and flow nets; compressibility and consolidation of soils; shearing strength of soils; stability of earth slopes; stress distribution in soil;...

406p dieptieuung 19-07-2023 5 3   Download

Suffusion is one of the four types of internal erosion and accounts for 46% of erosion phenomena in earth dams. Suffusion is an erosion of fine particles inside the soil structure that move out of the voids between coarse particles caused by permeability flow. Identification of internal erosion is necessary to mitigate the loss of humans and property as underground erosion occurs.

6p viwarmachine 01-07-2023 4 3   Download

In this study, the effects of salt solutions with different seawater proportions on some geotechnical properties of soft soil distributed in some areas from Mong Cai to Thanh Hoa province have been extensively investigated. The undisturbed soil samples were soaked into different salt solutions for ten days before testing.

10p vinikolatesla 31-03-2022 11 2   Download

(BQ)Lecture Engineering geology - Chapter 4: Index properties and classification of soils. After completing this section, you will understand the knowledge about essential factors govering the engineering behavior of soils, classify soils considering particle size and plasticity and estimates major indices that govern soil behavior.

29p lazzaro 03-12-2021 8 1   Download

In the study soil surveys conducted and GPS based soil samples were collected from each domain viz., Bhopal, Hoshangabad, Vidisha and Jabalpur of AESR 10.1 region.and for bulk density (BD), total porosity (TP), particle size distribution (Sand, Silt, Clay), analyzed then aggregate stability (AS) and structural stability index (SSI) were estimated in the Department of Soil Science and Agricultural Chemistry Jawaharlal Nehru Krishi Vishwa Vidyalaya, Jabalpur during 2018-2020.

28p cothumenhmong11 11-05-2021 13 1   Download

The Knowledge of spatial-variability is critical for site specific nutrient management in soil fertility. Soil sample (149) were gotten from surface from 10 selected sites for preparing precise digital maps using point, line and polygon tools of the GIS (TNTmips 2010) software. Soil spatial variability typically defines variation in soil properties in surface soil such as fertility, pH, EC, soil organic carbon (OC), free CaCO3, mineralizable N,P2O5, K2O and S.

10p chauchaungayxua11 23-03-2021 11 2   Download

This study was undertaken in 2016- 2017 by Division of Soil Science and Agri. Chemistry, Ratnai College of Agriculture, Akluj, India. In this module of experiential learning students collected 101 soil samples from Malshiras tahsil and analysed physico-chemical and chemical properties of different soils. In physico-chemical analysis average pH 7.86 which is slightly alkaline in reaction, EC-0.544dS/m which safe in soluble salt concentration, O.C-0.47 % is low to medium and CaCO3- 4.15% which indicates calcareous condition.

13p cothumenhmong9 18-01-2021 9 2   Download

Fourteen castor genotypes including two checks GC 3 and GCH 7 were grown in irrigated condition with recommended agronomic practices. The seeds were harvested at stage of their physiological maturity. The soil properties, seed quality parameters, fatty acid profile, ricinoleic acid were analysed as per standard methods.

7p nguathienthan8 20-10-2020 7 1   Download

A field experiment was conducted in an on going Long-Term Fertilizer Experiment during 2017-18 and 2018-19 at the Research Farm, College of Agriculture, Jawaharlal Nehru Krishi Vishwa Vidyalaya, Jabalpur to study the effect of long-term fertilizer application on performance of wheat crop and soil properties.

10p kethamoi7 26-08-2020 9 1   Download

Groundnut is an important oil seed crop largely grown under rainfed conditions in India. Uneven distribution and or failure of monsoon rain affects the plant growth and reduces the productivity When crop is subjected to water stress it closes the stomata leading to reduced photosynthesis. Detection of plant water stress and assessing the possible effect on the growth and yield of crop is often difficult and challenging.

9p angicungduoc6 22-07-2020 14 2   Download

The influence of Black Sea deep-water organo-mineral sediments (sapropels) on the quantities of basic for soil fertility trophic groups of microorganisms at cinnamon рseudopodzolic soil (Planosol) was investigated. The study was conducted in conditions of pot experiments with cultivating oriental type tobacco. Sapropels were added in an amount of 30 g / kg dry soil.Soil samples for microbiological analysis from rhizosphere zone of tobacco plants were taken.

9p kethamoi6 29-06-2020 16 2   Download

The present investigation evaluation of soil fertility status of pomegranate orchard by soil in Jalna district for this purpose collected representative soils from the selected sixty orchards. The pomegranate orchard soils were neutral to alkaline in reaction and electrical conductivity of pomegranate orchard soil was in safe limit for the crop growth.

4p nguathienthan4 21-04-2020 6 0   Download

An experiment on “Evaluation of factors affecting modulus of rupture as an index of crusting in soils of Haryana” was carried out during 2016-17 at Chaudhary Charan Singh Haryana Agricultural University, Hisar, Haryana. The soil samples were collected from 21 locations from farmers’ fields in from 0-5 and 5-15 cm depths from different districts of the Haryana having wide range of texture ranging from sand to silty clay loam. The effect of different physico-chemical properties of these texturally different soils was evaluated on their modulus of rupture (MOR) values.

8p caygaocaolon4 04-04-2020 22 1   Download

The present study was conducted during the year 2018 and 2019 at Department of Soil Science and Agricultural Chemistry, Dr Panjabrao Deshmukh Krishi Vidyapeeth, Akola, Maharashtra with an aim to know the macro and micronutrient status of soils of Washim road farm, Dr. PDKV Akola. Grid based (GPS) forty-four (44) surface (0-20 cm depth) soil samples were collected by grid survey method at 200m distance from Washim road farm and analyzed as per standard procedure for judging chemical properties and available nutrient status of soil.

7p caygaocaolon3 09-03-2020 10 0   Download

The study was carried out to know the fertility status of major nutrients in soils of Bhudargad tehsil, Kolhapur district by using GPS-GIS technology and to correlate soil properties with the available nutrients and to evaluate the fertility index of Bhudargad tehsil. The pH of soils of Bhudargad tehsil varied from 5.5 to 8.0, most of the soils were moderately acidic (50.67%) while EC of the soils varied from 0.02 to 1.48 dS m-1 , and the values were normal. The calcium carbonate content of soils of Bhudargad tehsil varied from 0.50 to 2.80 per cent.

10p caygaocaolon3 27-02-2020 19 1   Download

An investigation was carried out at All India Co-ordinated Research Project on Micro and Secondary Nutrients and Pollutant Elements in Soils and Plants under Department of Soil Science & Agricultural Chemistry, Dr. Panjabrao Deshmukh Krishi Vidyapeeth, Akola, Maharashtra to assess the chemical properties, available sulphur and micronutrients status in soils of Jalgaon district in the year 2017-18. GPS based 480 soil samples (0-20 cm) from 15 tehsils in Jalgaon district of Maharashtra at 5 km grid were collected and analysed in the laboratory.

8p trinhthamhodang3 14-02-2020 38 1   Download

Studies were conducted to evaluate the effect of inorganic and organic fertilization on growth, yield of wheat and nutrient status of the soil. Significant differences in the vegetative growth parameters viz. plant height, number of green leaves, number of tillers/meter row length and yield parameters viz. Spike length, number of spikelets per spike, number of grains/ear, number of ear heads/m2 , test weight, straw yield and biological yield was highest under the application of 50 % recommended dose of fertilizers along with application of 5 t/ha vermicompost (T7).

10p trinhthamhodang3 12-02-2020 32 0   Download

The present investigation was carried out for evaluation of the status of DTPA-Fe, Cu, Mn and Zn in relation with chemical properties in soils of Solapur district for this purpose representative soil samples were collected from different villages of Solapur district. The micronutrient and some important soil physico-chemical properties were investigated by using GPS and GIS techniques. Considering the critical limits of soil micronutrients, all soil associations were not adequately supplied with DTPA extractable micronutrients.

12p nguaconbaynhay3 07-02-2020 10 0   Download

Nutrient index of available S in soils of two districts, namely, Howrah and South Dinajpur of West Bengal falling in the soil order Inceptisols collecting 237 soil samples from Howrah and 256 soil samples from South Dinajpur district. Soil samples were collected according to grid sampling pattern maintaining approximately 4.0 km grid for Howrah and 3.7 km grid for South Dinajpur district using global positioning system (GARMIN GPS Version etrex) covering 13 blocks of Howrah and 8 blocks of South Dinajpur district. Soil pH of the Howrah and South Dinajpur district ranged from 3.0to 8.

9p kethamoi2 15-12-2019 18 1   Download