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פותח על ידי קלירמאש פתרונות בע"מ -
Soil mineralogy and texture effects on crust micromorphology, infiltration, and erosion
Year:
2002
Authors :
בן-חור, מני
;
.
Volume :
66
Co-Authors:
Wakindiki, I.I.C., Dep. of Soil Science, Egerton University, P.O. Box 536, Njoro, Kenya
Ben-Hur, M., Institute of Soil, Water and Environmental Sciences, Volcani Center, Agricultural Research Organization, P.O. Box 6, Bet Dagan, 50250, Israel
Facilitators :
From page:
897
To page:
905
(
Total pages:
9
)
Abstract:
Soil mineralogy and texture have substantial effects on aggregate stability and, therefore, may influence infiltration rate (IR) and soil loss under rainfall. The objective was to study the effects of soil mineralogy and texture on crust micromorphology, infiltration, and erosion. Five soils with differing properties were subjected to 80 mm of simulated rainfall. The aggregate stability of these soils was determined by the fast wetting method. The mean-weight diameters of the particles after the fast wetting were 2.8 mm in the clayey kaolinitic soil, 0.25 and 0.31 mm in the clayey and sandy loam montmorillonitic soils, respectively, and 0.84 and 0.87 mm in the clayey nonphyllosilicate soils. The final IR was 20.5 mm h-1 in the clayey kaolinitic soil and ≤9.3 mm h-1 in the remaining soils. Scanning electron microscope (SEM) observations indicated that the kaolinitic soil had a thin crust (∼0.1 mm) containing large particles (∼0.1 mm), whereas the montmorillonitic soils had thicker crusts (>0.2 mm) comprising either small (∼0.02 mm) particles with a very developed washed-in zone underneath or large (∼0.2 mm) ones with fine material between them. The crust layer in the nonphyllosilicate soils was ∼0.2 mm thick and composed of fine particles ∼0.01 mm. The high aggregate stability and the low dispersivity of the kaolinitic soil, which minimized soil detachment, and its low runoff, which minimized its transport capacity, limited the soil loss to 0.33 kg m-2, whereas the low aggregate stability and high runoff of the montmorillonitic soils contributed to their soil losses of 1.24 and 1.14 kg m-2. The intermediate aggregate stability and the high runoff of the nonphyllosilicate soils accounted for their intermediate soil losses of 0.75 and 0.8 kg m-2.
Note:
Related Files :
Erosion
micromorphology
rain
rainfall
runoff
soil texture
water erosion
Wetting
עוד תגיות
תוכן קשור
More details
DOI :
Article number:
Affiliations:
Database:
סקופוס
Publication Type:
מאמר
;
.
Language:
אנגלית
Editors' remarks:
ID:
22740
Last updated date:
02/03/2022 17:27
Creation date:
16/04/2018 23:54
Scientific Publication
Soil mineralogy and texture effects on crust micromorphology, infiltration, and erosion
66
Wakindiki, I.I.C., Dep. of Soil Science, Egerton University, P.O. Box 536, Njoro, Kenya
Ben-Hur, M., Institute of Soil, Water and Environmental Sciences, Volcani Center, Agricultural Research Organization, P.O. Box 6, Bet Dagan, 50250, Israel
Soil mineralogy and texture effects on crust micromorphology, infiltration, and erosion
Soil mineralogy and texture have substantial effects on aggregate stability and, therefore, may influence infiltration rate (IR) and soil loss under rainfall. The objective was to study the effects of soil mineralogy and texture on crust micromorphology, infiltration, and erosion. Five soils with differing properties were subjected to 80 mm of simulated rainfall. The aggregate stability of these soils was determined by the fast wetting method. The mean-weight diameters of the particles after the fast wetting were 2.8 mm in the clayey kaolinitic soil, 0.25 and 0.31 mm in the clayey and sandy loam montmorillonitic soils, respectively, and 0.84 and 0.87 mm in the clayey nonphyllosilicate soils. The final IR was 20.5 mm h-1 in the clayey kaolinitic soil and ≤9.3 mm h-1 in the remaining soils. Scanning electron microscope (SEM) observations indicated that the kaolinitic soil had a thin crust (∼0.1 mm) containing large particles (∼0.1 mm), whereas the montmorillonitic soils had thicker crusts (>0.2 mm) comprising either small (∼0.02 mm) particles with a very developed washed-in zone underneath or large (∼0.2 mm) ones with fine material between them. The crust layer in the nonphyllosilicate soils was ∼0.2 mm thick and composed of fine particles ∼0.01 mm. The high aggregate stability and the low dispersivity of the kaolinitic soil, which minimized soil detachment, and its low runoff, which minimized its transport capacity, limited the soil loss to 0.33 kg m-2, whereas the low aggregate stability and high runoff of the montmorillonitic soils contributed to their soil losses of 1.24 and 1.14 kg m-2. The intermediate aggregate stability and the high runoff of the nonphyllosilicate soils accounted for their intermediate soil losses of 0.75 and 0.8 kg m-2.
Scientific Publication
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