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Effect of exchangeable sodium and phosphogypsum on the hydraulic properties of several South African soils
Year:
1985
Authors :
שיינברג, יצחק
;
.
Volume :
2
Co-Authors:
Du Plessis, H.M., Soil and Irrigation Research Institute, Private Bag X79, Pretoria, 0001, South Africa
Shainberg, I., Institute of Soils and Water, Volcani Center, ARO, P.O. Box 6, Bet Dagan, 50 250, Israel
Facilitators :
From page:
179
To page:
186
(
Total pages:
8
)
Abstract:
The susceptibility of soils to the deleterious effects of sodicity was assessed for samples which varied with respect to physical, mineralogical and other properties. For this purpose soil samples were collected from different locations in South Africa. The effect of electrolyte concentration and sodium adsorption ratio (SAR) on hydraulic conductivity (HC) was determined with permeameters, while the combined effects of raindrop impact energy and low electrolyte concentration of rain on infiltration rate (IR) were assessed using a rainfall simulator. Soils proved to be either stable or susceptible to the effects of sodicity as indicated by modulus of rupture, air-water permeability ratio, HC and IR measurements. Sesquioxides and organic matter promoted stability. Final IR was always less than HC due to crust formation even at low exchangeable sodium percentage (ESP) levels as a result of the dispersive effects of both mechanical impact (physical disruption) of rain drops and low electrolyte concentration (chemical dispersion). When the chemical effect was reduced (ESP>1 or higher electrolyte concentration as a result of surface gypsum application), final IR was higher. © 1985 Taylor & Francis Group, LLC.
Note:
Related Files :
electrolyte concentration
hydraulic conductivity
Infiltration rate
Sodium adsorption ratio
Soil stability
עוד תגיות
תוכן קשור
More details
DOI :
10.1080/02571862.1985.10634166
Article number:
Affiliations:
Database:
סקופוס
Publication Type:
מאמר
;
.
Language:
אנגלית
Editors' remarks:
ID:
28726
Last updated date:
02/03/2022 17:27
Creation date:
17/04/2018 00:41
Scientific Publication
Effect of exchangeable sodium and phosphogypsum on the hydraulic properties of several South African soils
2
Du Plessis, H.M., Soil and Irrigation Research Institute, Private Bag X79, Pretoria, 0001, South Africa
Shainberg, I., Institute of Soils and Water, Volcani Center, ARO, P.O. Box 6, Bet Dagan, 50 250, Israel
Effect of exchangeable sodium and phosphogypsum on the hydraulic properties of several South African soils
The susceptibility of soils to the deleterious effects of sodicity was assessed for samples which varied with respect to physical, mineralogical and other properties. For this purpose soil samples were collected from different locations in South Africa. The effect of electrolyte concentration and sodium adsorption ratio (SAR) on hydraulic conductivity (HC) was determined with permeameters, while the combined effects of raindrop impact energy and low electrolyte concentration of rain on infiltration rate (IR) were assessed using a rainfall simulator. Soils proved to be either stable or susceptible to the effects of sodicity as indicated by modulus of rupture, air-water permeability ratio, HC and IR measurements. Sesquioxides and organic matter promoted stability. Final IR was always less than HC due to crust formation even at low exchangeable sodium percentage (ESP) levels as a result of the dispersive effects of both mechanical impact (physical disruption) of rain drops and low electrolyte concentration (chemical dispersion). When the chemical effect was reduced (ESP>1 or higher electrolyte concentration as a result of surface gypsum application), final IR was higher. © 1985 Taylor & Francis Group, LLC.
Scientific Publication
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