EFFECTS OF WETTING/DRYING, FREEZING/THAWING AND EARTH WORM ACTIVITIES ON SOIL HYDRAULIC PROPERTIES

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SAFADOUST A.; MOSADEGHI M.R.; MAHBOUBI A.A.; YOUSEFI G.

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Journal: Journal of Water and Soil Year:2012 | Volume:26 | Issue:2 Page(s): 340-348

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Information Journal Paper

Title

EFFECTS OF WETTING/DRYING, FREEZING/THAWING AND EARTH WORM ACTIVITIES ON SOIL HYDRAULIC PROPERTIES

Author(s)

SAFADOUST A. | MOSADEGHI M.R. | MAHBOUBI A.A. | YOUSEFI G. | Issue Writer Certificate

Keywords

HYDRAULIC PROPERTIESQ1

PHYSICAL CHANGESQ2

REPAIRED SOILQ2

WETTING AND DRYINGQ2

FREEZING AND THAWINGQ2

Abstract

The purpose of this study was to asses the potential impact of physical and biological changes on soil HYDRAULIC PROPERTIES in the prepared soil columns. A clay loam (CL) and a sandy loam (SL) soil, were used for the two types of repacked and REPAIRED SOIL columns. For this purpose the soil was passed through a 8-mm sieve and poured into large cylinder. In total, 24 columns were prepared out of which 8 columns were used as repacked columns and the rest (16 columns) were installed in the field under effects of wetting/drying and freezing/thawing cycles (physical changes). Of the physically changed columns 8 columns were subjected to earth worm activity (biological changes). All experiments were conducted with four replicates. Applied experimental treatments (averaged over physical and biological changes and soil texture) caused a decrease in bulk density (6.5%) and an increase in macropore (39.8%), mesopore (32.8%), micropore (20.0%), filed capacity (28.4%), wilting point (7.5%), available water content (43.3%) and the volumetric water content at 5 cm matric suction (28.1%) through soil columns. The grater values of these properties were shown in clay loam soil which confirms the greater affinity of clay in regeneration of soil structure and soil pore improvement. These changes verify the effects of WETTING AND DRYING and FREEZING AND THAWING cycles in modification of soil structure.

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APA: Copy

SAFADOUST, A., MOSADEGHI, M.R., MAHBOUBI, A.A., & YOUSEFI, G.. (2012). EFFECTS OF WETTING/DRYING, FREEZING/THAWING AND EARTH WORM ACTIVITIES ON SOIL HYDRAULIC PROPERTIES. JOURNAL OF WATER AND SOIL (AGRICULTURAL SCIENCES AND TECHNOLOGY), 26(2), 340-348. SID. https://sid.ir/paper/141341/en

Vancouver: Copy

SAFADOUST A., MOSADEGHI M.R., MAHBOUBI A.A., YOUSEFI G.. EFFECTS OF WETTING/DRYING, FREEZING/THAWING AND EARTH WORM ACTIVITIES ON SOIL HYDRAULIC PROPERTIES. JOURNAL OF WATER AND SOIL (AGRICULTURAL SCIENCES AND TECHNOLOGY)[Internet]. 2012;26(2):340-348. Available from: https://sid.ir/paper/141341/en

IEEE: Copy

A. SAFADOUST, M.R. MOSADEGHI, A.A. MAHBOUBI, and G. YOUSEFI, “EFFECTS OF WETTING/DRYING, FREEZING/THAWING AND EARTH WORM ACTIVITIES ON SOIL HYDRAULIC PROPERTIES,” JOURNAL OF WATER AND SOIL (AGRICULTURAL SCIENCES AND TECHNOLOGY), vol. 26, no. 2, pp. 340–348, 2012, [Online]. Available: https://sid.ir/paper/141341/en

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