STUDY OF THE RELATIONSHIP BETWEEN SLOPE OF RETENTION CURVE AND SOME PHYSICAL PROPERTIES OF SOIL QUALITY

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EMAMI HOJAT; LAKZIAN AMIR; MOHAGERPOUR M.

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Journal: Journal of Water and Soil Year:2011 | Volume:24 | Issue:5 Page(s): 1027-1035

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Title

STUDY OF THE RELATIONSHIP BETWEEN SLOPE OF RETENTION CURVE AND SOME PHYSICAL PROPERTIES OF SOIL QUALITY

Author(s)

EMAMI HOJAT | LAKZIAN AMIR | MOHAGERPOUR M. | Issue Writer Certificate

Keywords

SOIL QUALITYQ2

SLOPE OF RETENTION CURVEQ3

PENETRATION RESISTANCEQ1

LEAST LIMITING WATER RANGEQ3

AVAILABLE WATER CONTENTQ1

Abstract

Different definitions have been proposed for SOIL QUALITY. Various soil properties have been suggested as SOIL QUALITY indices by researchers. This research was conducted to study the relationship between SLOPE OF RETENTION CURVE at its inflection point (S index) and other soil physical quality indices, because the researches between S index and soil physical properties are little. Thirty five soil samples were collected and some physical and chemical properties measured. The moisture contents were measured at 0, 1.5, 2.5, 5.5, 10, 20, 30, 50, 100, 200, 300, 500, 1000 kpa pressure heads. The parameters of Van Genuchten equation (1980) were determined by using of RETC software. The SLOPE OF RETENTION CURVE at the inflection point was determined and it was considered as soil physical quality index (S). Then the relationship between S index and soil physical properties was determined by SPSS software. According to the S index and PENETRATION RESISTANCE (PR), it seems that the physical quality of studied soil samples was suitable for accessing. Also there was a significant correlation between S index with mean weight diameter (MWD), clay percentage, sodium absorption ratio (SAR), organic matter percentage, electrical conductivity (EC), LEAST LIMITING WATER RANGE (LLWR), AVAILABLE WATER CONTENT (AWC), and PENETRATION RESISTANCE (p<0.01). In addition the correlation between S index with bulk density and calcium carbonate was significant at p<0.05. Among the studied parameters, the correlation between S index with clay percentage, bulk density, EC, and PENETRATION RESISTANCE was negative and S index had a direct relation with other soil properties.

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APA: Copy

EMAMI, HOJAT, LAKZIAN, AMIR, & MOHAGERPOUR, M.. (2011). STUDY OF THE RELATIONSHIP BETWEEN SLOPE OF RETENTION CURVE AND SOME PHYSICAL PROPERTIES OF SOIL QUALITY. JOURNAL OF WATER AND SOIL (AGRICULTURAL SCIENCES AND TECHNOLOGY), 24(5), 1027-1035. SID. https://sid.ir/paper/141367/en

Vancouver: Copy

EMAMI HOJAT, LAKZIAN AMIR, MOHAGERPOUR M.. STUDY OF THE RELATIONSHIP BETWEEN SLOPE OF RETENTION CURVE AND SOME PHYSICAL PROPERTIES OF SOIL QUALITY. JOURNAL OF WATER AND SOIL (AGRICULTURAL SCIENCES AND TECHNOLOGY)[Internet]. 2011;24(5):1027-1035. Available from: https://sid.ir/paper/141367/en

IEEE: Copy

HOJAT EMAMI, AMIR LAKZIAN, and M. MOHAGERPOUR, “STUDY OF THE RELATIONSHIP BETWEEN SLOPE OF RETENTION CURVE AND SOME PHYSICAL PROPERTIES OF SOIL QUALITY,” JOURNAL OF WATER AND SOIL (AGRICULTURAL SCIENCES AND TECHNOLOGY), vol. 24, no. 5, pp. 1027–1035, 2011, [Online]. Available: https://sid.ir/paper/141367/en

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