Accuracy of the saxton-rawls method for estimating the soil water characteristics for mineral soils of Malaysia
The purpose of this study was to determine the accuracy of the Saxton-Rawls method in estimating the soil water characteristics of a wide range of mineral soils of Malaysia. This study found that it was necessary to calibrate the Saxton-Rawls method for the soils of Malaysia. The developed equatio...
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| Main Authors: | , |
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| Format: | Article |
| Language: | English |
| Published: |
Universiti Putra Malaysia Press
2010
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| Online Access: | http://psasir.upm.edu.my/id/eprint/11481/1/Accuracy_of_the_Saxton-Rawls.pdf http://psasir.upm.edu.my/id/eprint/11481/ http://www.pertanika.upm.edu.my/Pertanika%20PAPERS/JTAS%20Vol.%2033%20(2)%20Aug.%202010/19%20Pg%20297-302.pdf |
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| Summary: | The purpose of this study was to determine the accuracy of the Saxton-Rawls method in estimating the soil
water characteristics of a wide range of mineral soils of Malaysia. This study found that it was necessary
to calibrate the Saxton-Rawls method for the soils of Malaysia. The developed equation for calibration was
Pti = a $ Pi ]1 - Pig, where Pi and Pi t are the uncalibrated and calibrated estimated values, respectively, for the
soil sample no. i, and the parameter values of a were 2.225, 1.605, and 1.528 (for saturation, field capacity,
and permanent wilting point) respectively. The calibrated method was validated against three independent
soil data sets. The validation tests showed that the calibrated method remained stable and was more accurate
than that without any calibration, by an average between 8 to 49%. |
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