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Jul 01, 2018 Various spectral soil salinity indices were tested for assessing and enhancing the variations in surface soil salinity. Out of all indices tested, the salinity index (SI), was used to create enhanced images for soil salinity in this study, due to its high significant correlation with EC (Goovaerts, 1999, Dehni and Lounis, 2012).
evaluate the soil salinity conditions in both seasonal and annual periods. .2 Soil salinity indices. Sixteen various spectral salinity indices developed in numerous studies related to salt detection and soil salinity mapping were examined for all the Landsat images and the most used seven salinity indices (NDSI, SI 1, SI 2,SI 4, SI
May 13, 2019 where SI refers to salinity indices, and B and R refer to blue band and red bands, respectively.. Salt is one of the most important factors in soil chemistry restricting the growth of vegetation (Fan et al. 2012).The type, biomass, and succession characteristics of halophytic vegetation are highly correlated with soil salt content.
Under controlled environmental conditions, irrigation is essential and the use of fertigation becomes a facilitator agent for water and fertilization management. However, the intensive use of fertigation in this type of productive process can increase soil salinity, and affect productive process. This work objective was to evaluate a methodology in order to characterize the
Soil salinity mapping using dual-polarized SAR Sentinel-1 imagery Mohammad Mahdi Taghadosi a, Mahdi Hasanlou and Kamran Eftekharib aSchool of Surveying and Geospatial Engineering, College of Engineering, University of Tehran, Tehran, Iran bDepartment of Soil Genesis, Classication and Cartography, Soil and Water Research Institute, Karaj, Iran ABSTRACT ...
A Sigma Probe (EC1 Sigma Probe, Delta-T Devices Ltd., Cambridge, UK) was used to measure soil solution electrical conductivity ( w ) at 5 cm horizontal intervals in a spatial grid within the 50 ...
Mapping of soil salinity and sodicity using digital image analysis and GIS in irrigated lands of the Indo-Gangetic Plain R. C. SHARMA AND A. K. MONDAL Central Soil Salinity Research Institute, Karnal-132 001, India Abstract Salt-affected soils in irrigation command of the Western Jamuna Canal were mapped using digital image analysis and GIS.
Nov 01, 2016 Four soil salinity gradients were tested during the 90-day trials. Even without any addition of salt, routine irrigation and fertilization significantly enhanced salinity (P 0.05).When salt was added, salinization dramatically increased, creating extreme salinization when more salty water was used (Table 1, lower-case letter analysis).Increased salinity during cultivation
Apr 09, 2005 The Sigma Probe (EC1 Sigma Probe, ... Lenhard, R.J., and Si mmons, C.S., 1991. Recent studies of flow and . transport in the ... Soil salinity affects an estimated 1 million hectares in the ...
May 13, 2019 Results showed that (1) the MSAVISI feature space model considering the soil line had greater efficiency and applicability for monitoring salinized soil in the Yellow River Delta with R 2 0.8975 and an overall precision of 86.7% validation of salinization classification (2) the soil salinization was widely and discontinuously distributed ...
Nano-selenium (nano-Se, 25 mg L-1), silicon (Si, 200 mg L-1) and hydrogen peroxide (H 2 O 2, 20 mmol L-1) were foliar applied on cucumber plants as anti-stress compounds. The results revealed that studied anti-stressors improved growth and productivity of cucumber grown in saline soil regardless the kind of anti-stressor under heat stress.
Measures of salinity. Salinity is a measure of soluble salts in soil or water. Salt is any molecule comprised of a cation, such as sodium , potassium and calcium 2 , and an anion, such as chloride - and sulfate 2-. Sodium chloride (NaCl) is the most common salt in groundwater and soils in Western Australia.
The process of soil salinization is a widespread ... (Sigma-Aldrich, Poland). Plates were incubated at ... si-derophores on CAS medium (Alexander
Salinity Units of Concentration Weight Basis 1 ppm 1 mg/l 1 mg/kg 1% 10,000 ppm Volume Basis mg/l meq/l 1mmol c /l 1 meq/l Systeme International dUnites (SI) Total dissolved solids (TDS) in irrigation and soil water
-Amylase is a member of the endo-amylase family. Its molecular weight is 57.6 kDa. -Amylase is composed of three functional domains namely A, B and C. Domain A is a barrel-shaped (/) 8 structure and is the largest domain. Domain B is linked to domain A via disulfide bond and is present between domain A and C. Domain C is composed of -sheets and is connected to
This paper concentrates on the experimental calibration of a rapid, non-destructive sensor to investigate the salinization process by measuring the dielectric properties of the soil to estimate both the soil water content (theta) and pore water electrical conductivity (sigma(p)) for different soil types. The proposed sensor depends on the frequency domain reflectometry (FDR)
Mar 23, 2021 Soil salinization is one of the main processes causing land degradation and desertification (Wang et al. 2020a), and it thereby threatens agricultural production (Metternicht and Zinck 2003), soil sustainability, and food security (Cerd et al. 2018a).As an environmental hazard, it is an important challenge for 10 million km 2 in 100 countries (Ivushkin et al. 2019).
Jan 01, 2015 The potential evapotranspiration is computed from MODIS data to evaluate the effects of soil salinity on growing crops. The results confirm soil degradation and the synergy of using multi-spectral and radar data for crops monitoring. 2015 The Authors. Published by Elsevier B.V. Peer-review under responsibility of the University of ...
saline soils, (2) the absolute plant growth or yield, and (3) the relative growth on saline soils as compared with that on non saline soils. Therefore, and based on these facts, the aim of this study was to evaluate the effect of three salinity treatments (35, 70 and 120 mM of NaCl) with regard to a
8 hours ago The SI unit for electrical conductance is the Siemen, so electrical conductivity has units of S/m. Units used in older literature are mho/cm (mho is the reciprocal of ohm). Soil EC was commonly reported in mmho/cm. 1 mmho/cm equals 1 mS/cm, but because SI discourages the use of submultiples in the denominator, this unit is changed to deciSiemen ...
Routine soil testing can identify your soils salinity . levels and suggest measures you can take to correct the specific salinity problem in your soil. Salinity and salt. The terms salt and salinity are often used inter-changeably, and sometimes incorrectly. A salt is sim-ply an inorganic mineral that can dissolve in water.
Mapping soil salinity with spectrum indices With remote sensing, the soil salinity index can be derived from image using mathematical process on main sensors bands and many maps with spectrum characters could be extracted. The most important indices for soil salinity are brightness index (BI), salinity index (SI),
Aug 18, 2021 Salinization of groundwater and soil solutions is a serious, and increasingly concerning, ecological threat linked to climate change. Salinization of natural solutions is driven by sea level rise ...
May 10, 2021 For instance, plants treated with 200 mg SiNPs as the foliar application had Si content of 5.01 mg kg 1, while when soil application was applied the Si content was 5.13 mg kg 1 . However, higher Si contents were measured in leaves of plants received SiNPs added as a combined foliar and soil application.
Si pertanto pensato di accertare se las- ... and calculated salinity in soil at the end of the experiment. Irrigation treatment Conductivity Salinity of soil ... Statistical analyses were done with SIGMA-STAT. The extinction values were examined for significant differences in relation to the genotype of test plant and salt treatment in a ...
Soil salinity control Taking into account the homogeneity of the plots, the soil was significant relationship was obtained between the electrical con-ductivity of the saturated soil extract (ECe) and the aqueous soil/ water extract 1/5 (EC15) according to the method of Richards et al. (1954) and was used for the soil salinity control ECe 7 ...
2016) the salinity problem also affects agricultural soils and water used in irrigation. Jabbar et al. (2018) reported that saline soil in Basrah city increased from 13.3% in 2000 to 19.4% in 2015. However, no studies have been conducted on the effect of salinity on the bioavailability of Pb to date palm Phoenix
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Salinity 1.80655 Cl As of 1978, it became standard to calculate practical salinity S from measured conductivity (PSS-78) Note practical salinity is unit-less, and is not a SI quantity Salinity Measurement The Past Standard Mean Ocean Water (SMOW) S 35, Cl 19
Jan 01, 2017 The contents were 1.082%, 1.392%, and 1.224%. The CSS of the 40 cm soil sample was the highest in the vertical profile of the superficial soil zone. Because the soil with salt may cause salt expansion, the soil of 40 cm depth may cause a relatively heavy frost heaving. In this study, the soil at the 40 cm depth was used for FR prediction.
Jul 28, 2020 The hydrogeological and hydrogeochemical data of 75 groundwater samples and Landsat 8 OLI satellite data were used to identify the source and mechanism of groundwater and soil salinization in Femenin-Ghahavand aquifer (FGA) in Hamadan area, Iran. Generally, the EC values range from 350 to 7556 S/cm with a mean value of 1785 S/cm. The salinity value
Mar 14, 2016 If the soil salinity increases, the zeta potential reduces, and this can reduce the electroosmotic flow. Therefore, electrokinetic consolidation is unlikely to be successful in highly saline soils. The level of soil salinity can be either estimated by electrical conductivity (S or mS) or amount of salt content (ppm).
The Soil Quality Test Kit Guide (prepared by NRCS and ARS) is an 82-page booklet containing procedures for 12 on-farm tests, an interpretive section for each test, data recording sheets, and a section on how to build the kit. Chapter 5 includes an electrical conductivity test for salinity. See Section II for salt tolerance of selected crops.
California has resulted in soil salinization of land used for agriculture. Agricultural engineering solutions to decrease naturally occurring salinity have in turn created problems with respect to disposal of the highly saline irrigation drainage waters. A major problem with disposal of return waters from the west-