Pedosphere 21(2): 230--237, 2011
ISSN 1002-0160/CN 32-1315/P
©2011 Soil Science Society of China
Published by Elsevier B.V. and Science Press
| Evaluation of pedotransfer functions for estimating soil water retention curve of saline and saline-alkali soils of Iran |
Y. ABBASI1, B. GHANBARIAN-ALAVIJEH1,2 , A. M. LIAGHAT1 and M. SHORAFA3 |
1 Department of Irrigation and Reclamation Engineering, University of Tehran, Karaj 31587-77871 (Iran)
2 Department of Earth and Environmental Sciences, Wright State University, Dayton OH 45435 (USA)
3 Department of Soil Science Engineering, University of Tehran, Karaj 31587-77871 (Iran) |
| ABSTRACT |
| Soil water retention data are essential for irrigation scheduling and determination of irrigation frequency.However,direct measurement of this characteristic is time consuming and expensive and furthermore its spatial and temporal variabilities in field scales increase the number of measurements.Different pedotransfer functions,such as Saxton et al.,Campbell,Vereecken et al.,Rawls and Brakensiek,Woösten et al.,Rajkai et al.,Ghorbani Dashtaki and Homaee,Zacharias and Wessolek,and Rosetta,were evaluated to estimate soil water retention of saline and saline-alkali soils collected from south of Tehran,Iran.The saturation-extract conductivity of all the 68 samples and exchangeable sodium percentage of more than half of them were measured to be greater than 4 dS m-1 and 15%,respectively.The calculated Akaike's information criterion values showed that Saxton et al.and Campbell models were the best in estimation of soil water retention curve and total available water,respectively. |
| Key Words: exchangeable sodium percentage, irrigation frequency, soil moisture curve, total available water |
| Citation: Abbasi, Y., Ghanbarian-alavijeh, B., Liaghat, A. M. and Shorafa, M. 2011. Evaluation of pedotransfer functions for estimating soil water retention curve of saline and saline-alkali soils of Iran. Pedosphere. 21(2): 230-237. |
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