Effect Rock Fragment Content on Some Physical Quality Indices of a Silt Loam Soil

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ASGARZADEH HOSEIN; ASADZADEH FARROKH; KHALEGHI PARVIN

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Journal: Iranian Journal of Soil and Water Research Year:2017 | Volume:48 | Issue:4 Page(s): 789-797

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Title

Effect Rock Fragment Content on Some Physical Quality Indices of a Silt Loam Soil

Author(s)

ASGARZADEH HOSEIN | ASADZADEH FARROKH | KHALEGHI PARVIN | Issue Writer Certificate

Keywords

gravel contentQ1

water retention curveQ2

soil penetration resistance curveQ1

soil physical quality indicesQ1

Abstract

This study was conducted to investigate the role of rock fragment content on water retention and soil penetration resistance curves as well as determining the correlation of soil physical quality indices with the rock fragment content of the soil. A silt loam soil, containing 5% w/w 2 to 5 mm in diameter rock fragments, was employed for the study. The experiment was carried out based on a completely randomized design with six treatments and three replications. The treatments include six levels of 5, 10, 15, 20, 25, and 30% w/w of 2 to 5 mm diameter gravel. Large drainable soil bins (40 cm × 50 cm with 50 cm depth) were used throughout the study. The bins were put outside (under natural conditions) after being sowed with wheat (Triticum aestivum L. ) and received enough water using irrigation and rainfall. There were significant differences (p<0. 05) between the soil water content values in important matric suctions. The highest (i. e., 0. 322 cm3 cm-3) and the lowest (i. e., 0. 269 cm3 cm-3) means of water content at matric suction of 100 hPa were obtained for the treatments of 10 and 30 percentage of the rock fragment content, respectively. Increase in rock fragment share content of the soil significantly reduced the water content where the critical penetration resistance of 2 MPa occurred. There was significant relationship between the water content of 2 MPa and rock fragment content of the soil. Increase in the rock fragment from the normal value (5%) to 30% caused the bulk density and infiltration time increase to more than 11 and 254, respectively.

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APA: Copy

ASGARZADEH, HOSEIN, ASADZADEH, FARROKH, & KHALEGHI, PARVIN. (2017). Effect Rock Fragment Content on Some Physical Quality Indices of a Silt Loam Soil. IRANIAN JOURNAL OF SOIL AND WATER RESEARCH, 48(4 ), 789-797. SID. https://sid.ir/paper/225705/en

Vancouver: Copy

ASGARZADEH HOSEIN, ASADZADEH FARROKH, KHALEGHI PARVIN. Effect Rock Fragment Content on Some Physical Quality Indices of a Silt Loam Soil. IRANIAN JOURNAL OF SOIL AND WATER RESEARCH[Internet]. 2017;48(4 ):789-797. Available from: https://sid.ir/paper/225705/en

IEEE: Copy

HOSEIN ASGARZADEH, FARROKH ASADZADEH, and PARVIN KHALEGHI, “Effect Rock Fragment Content on Some Physical Quality Indices of a Silt Loam Soil,” IRANIAN JOURNAL OF SOIL AND WATER RESEARCH, vol. 48, no. 4 , pp. 789–797, 2017, [Online]. Available: https://sid.ir/paper/225705/en

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