INVESTIGATION OF FACTORS AFFECTING CRACKING BEHAVIOR IN PADDY SOILS (CASE STUDY: GUILAN PROVINCE)

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YAZDANI M.R.; PARSINEJAD M.; SEPASKHAH A.R.; DAVATGAR N.; ARAGHINEJAD S.

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Journal: Journal of Water and Soil Science Year:2014 | Volume:18 | Issue:69 Page(s): 47-60

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Title

INVESTIGATION OF FACTORS AFFECTING CRACKING BEHAVIOR IN PADDY SOILS (CASE STUDY: GUILAN PROVINCE)

Author(s)

Keywords

PADDY FIELDSQ2

CRACKSQ2

IRRIGATIONQ2

CONTRACTIONQ2

MATRIC HEADQ2

GROUNDWATER DEPTHQ2

Abstract

Intermittent IRRIGATION of PADDY FIELDS with long intervals can cause CRACKS in heavy soils, facilitate loss of water and finally damage the crop. This study was carried out in order to investigate the cracking trend and some other factors affecting soil cracking in four different physiographical areas of paddy field. The study areas were Rasht, Shanderman, Astaneh and Khomam in Guilan province. The experiment was carried out in PADDY FIELDS with transplanted rice by determining the physical properties relevant to cracking behavior after IRRIGATION withdrawal in the reproductive stage. Soil analysis showed that despite similarity in type of dominant minerals, the linear expansion coefficients of Rasht and Khomam soils were higher than those of two other areas. In addition, there was a significant relationship between crack dimensions and volumetric soil water content and clay content. Furthermore, the temporal variation in study of crack development (depth, width and density) showed that they varied in different areas and were affected by volumetric soil water content and the GROUNDWATER DEPTH. In addition, the depth of CRACKS in all soils did not reach the hard pan. All the investigated soils showed a definite threshold for width and depth of CRACKS for 20-25 days after IRRIGATION withdrawal. After this period, specific values for width (about 3.0, 2.0, 2.5, and 5.0 cm) and depth of CRACKS (20, 25, 17, and 27 cm) were registered for Astaneh, Khomam, Shanderman and Rasht, respectively.

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APA: Copy

YAZDANI, M.R., PARSINEJAD, M., SEPASKHAH, A.R., DAVATGAR, N., & ARAGHINEJAD, S.. (2014). INVESTIGATION OF FACTORS AFFECTING CRACKING BEHAVIOR IN PADDY SOILS (CASE STUDY: GUILAN PROVINCE). WATER AND SOIL SCIENCE (JOURNAL OF SCIENCE AND TECHNOLOGY OF AGRICULTURE AND NATURAL RESOURCES), 18(69), 47-60. SID. https://sid.ir/paper/15059/en

Vancouver: Copy

YAZDANI M.R., PARSINEJAD M., SEPASKHAH A.R., DAVATGAR N., ARAGHINEJAD S.. INVESTIGATION OF FACTORS AFFECTING CRACKING BEHAVIOR IN PADDY SOILS (CASE STUDY: GUILAN PROVINCE). WATER AND SOIL SCIENCE (JOURNAL OF SCIENCE AND TECHNOLOGY OF AGRICULTURE AND NATURAL RESOURCES)[Internet]. 2014;18(69):47-60. Available from: https://sid.ir/paper/15059/en

IEEE: Copy

M.R. YAZDANI, M. PARSINEJAD, A.R. SEPASKHAH, N. DAVATGAR, and S. ARAGHINEJAD, “INVESTIGATION OF FACTORS AFFECTING CRACKING BEHAVIOR IN PADDY SOILS (CASE STUDY: GUILAN PROVINCE),” WATER AND SOIL SCIENCE (JOURNAL OF SCIENCE AND TECHNOLOGY OF AGRICULTURE AND NATURAL RESOURCES), vol. 18, no. 69, pp. 47–60, 2014, [Online]. Available: https://sid.ir/paper/15059/en

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