ESTIMATING OF SOIL WATER CHARACTERISTIC CURVE USING SOIL PARTICLE-SIZE DISTRIBUTION, SOIL BULK AND PARTICLE DENSITIES

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REZAEI A.; NEYSHABOURI M.R.

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Journal: JOURNAL OF AGRICULTURAL KNOWLEDGE Year:2002 | Volume:12 | Issue:3 Page(s): 29-37

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Title

ESTIMATING OF SOIL WATER CHARACTERISTIC CURVE USING SOIL PARTICLE-SIZE DISTRIBUTION, SOIL BULK AND PARTICLE DENSITIES

Author(s)

REZAEI A. | NEYSHABOURI M.R. | Issue Writer Certificate

Keywords

SOIL WATER CHARACTERISTICS CURVEQ2

SOIL PARTICLE SIZE DISTRIBUTION CURVEQ3

SOIL WATER POTENTIAL AND WATER CONTENTQ4

Abstract

SOIL WATER CHARACTERISTICS CURVE (SWC), is one of the most important traits of every soil and is employed in many aspects of soil management such as irrigation, drainage, land reclamation, infiltration and erosion. Laboratory method to determine this curve is time consuming, costly, difficult and involves some errors. For this reason researchers have tried to estimate it with the help of mathematical and statistical models. One of these models has been suggested by Arya and Paris. The primary concept of this model has been developed on the basis of shape similarity between SWC and cumulative soil particle size distribution (PSD) curves. An experimental coefficient (a) have been employed in this model. Arya and Paris obtained the mean of 1.38 for a. Evaluating the generality of this value for soils of various physical properties, particulary texture, was the main objective of this study. For this purpose, five soil series (Balestan, Arzanagh, Sharabian, Sarab and Gonbadan) were selected from the Sarab region in northwest of Iran. Within each series seven sites were specified and core (undisturbed) samples were taken from each site in triplicate. Composite disturbed samples also were taken. Percentage of soil particles, saturated water contents, soil bulk and densities and PSD curves were determined for all samples, and finally SWC curves were simulated by employing Arya and Paris model. The experimental SWC were also prepared using suction and pressure plate apparatus. Comparison of experimental soil water content at specified soil water potential with those predicted from the model indicated that a values ranged from 1.3 to 1.43. Within this range 1.3 seems justifiable for the most series and implies that the model with a=1.3 simulates SWC curves accurately enough. The generalization, however, may need more investigation.

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APA: Copy

REZAEI, A., & NEYSHABOURI, M.R.. (2002). ESTIMATING OF SOIL WATER CHARACTERISTIC CURVE USING SOIL PARTICLE-SIZE DISTRIBUTION, SOIL BULK AND PARTICLE DENSITIES. JOURNAL OF AGRICULTURAL KNOWLEDGE, 12(3), 29-37. SID. https://sid.ir/paper/28695/en

Vancouver: Copy

REZAEI A., NEYSHABOURI M.R.. ESTIMATING OF SOIL WATER CHARACTERISTIC CURVE USING SOIL PARTICLE-SIZE DISTRIBUTION, SOIL BULK AND PARTICLE DENSITIES. JOURNAL OF AGRICULTURAL KNOWLEDGE[Internet]. 2002;12(3):29-37. Available from: https://sid.ir/paper/28695/en

IEEE: Copy

A. REZAEI, and M.R. NEYSHABOURI, “ESTIMATING OF SOIL WATER CHARACTERISTIC CURVE USING SOIL PARTICLE-SIZE DISTRIBUTION, SOIL BULK AND PARTICLE DENSITIES,” JOURNAL OF AGRICULTURAL KNOWLEDGE, vol. 12, no. 3, pp. 29–37, 2002, [Online]. Available: https://sid.ir/paper/28695/en

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