Performance of Ordinary least Squares (OLS) and Bayesian network (BN) in Exchange sodium percentage prediction based on Sodium adsorption Ratio

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BARIKLOO A.; SERVATI M.; OLIAEI M.S.

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Journal: Journal of Water and Soil Conservation Year:2019 | Volume:26 | Issue:2 Page(s): 225-238

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Title

Performance of Ordinary least Squares (OLS) and Bayesian network (BN) in Exchange sodium percentage prediction based on Sodium adsorption Ratio

Author(s)

BARIKLOO A. | SERVATI M. | OLIAEI M.S. | Issue Writer Certificate

Keywords

BonabQ1

Easily-Measured propertiesQ1

ModelingQ2

Sodic soilQ1

Abstract

Background and Objectives: In the soil science, echangble sodium percentage and sodium adsorption ratio are two different criteria to evaluate of soil alkality. For measured of ESP, it is essential to have soil Cation Exchange Capacity (CEC). But, CEC determined by using laborious method is expensive and time consuming. Developing a model that predicts ESP indirectly from a Easily-Measured properties to be more appropriate and economical. Researches showed a relationship between ESP and SAR. So, SAR can be allocated to predict of ESP. For this reason, many attempts have been made to predict ESP from soil. The specific goal of the research develop model to determining ESP based on SAR by OLS and BN models for Bonab soils in East Azarbaijan province, Iran. Materials and Methods: For arrived presented research, 209 soil samples were taken by grid survey (250×250) of Bonab, Iran. The site is located at mean 1300 m above mean sea level, in semiarid climate in the Northwest of Iran. Then, some soil chemical properties such as Sodium, calcium, magnesium, SAR and ESP of the soil samples were measured using laboratory experiments. Then, two model was developed by OLS and BN. OLS estimators are linear functions of the values of the dependent variable which are linearly combined using weights that are a non-linear function of the values of the explanatory variables. So the OLS estimator is respect to how it uses the values of the dependent variable only and irrespective of how it uses the values of the explanatory. So A Bayesian network is a probabilistic graphical model that represents a set of variables and their conditional dependencies via a directed acyclic graph (DAG). Given symptoms, the network can be used to compute the probabilities of the presence of various diseases. Efficient algorithms can perform inference and learning in Bayesian networks. Generalizations of Bayesian networks that can represent and solve decision problems under uncertainty. Results: The Coefficient of Determination (R2) and Root Mean Square error (RMSE) of the soil ESP-SAR model is reported 0. 99, 0. 71 and 0. 98, 1. 63 by OLS and BN respectively. Based on the statistical result, both of soil ESP-SAR model was judged acceptable. T-test were used to compare the soil ESP values predicted using the soil ESP-SAR model with the soil ESP values measured by laboratory tests. The paired samples t-test results indicated that the difference between the soil ESP values predicted by the model and measured by laboratory tests were not statistically significant (P>0. 05). Therefore, the soil ESP-SAR model can provide an easy, economic and brief methodology to estimate soil ESP. The GMER index also indicated low estimation of two selected land evaluation method. Conclusion: The results of present study illustrated that OLS and BN models can predict ESP with acceptable limits. OLS and BN are mathematical models between input and output variables and have the ability of Modeling between ESP and SAR.

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APA: Copy

BARIKLOO, A., SERVATI, M., & OLIAEI, M.S.. (2019). Performance of Ordinary least Squares (OLS) and Bayesian network (BN) in Exchange sodium percentage prediction based on Sodium adsorption Ratio. JOURNAL OF WATER AND SOIL CONSERVATION (JOURNAL OF AGRICULTURAL SCIENCES AND NATURAL RESOURCES), 26(2 ), 225-238. SID. https://sid.ir/paper/156215/en

Vancouver: Copy

BARIKLOO A., SERVATI M., OLIAEI M.S.. Performance of Ordinary least Squares (OLS) and Bayesian network (BN) in Exchange sodium percentage prediction based on Sodium adsorption Ratio. JOURNAL OF WATER AND SOIL CONSERVATION (JOURNAL OF AGRICULTURAL SCIENCES AND NATURAL RESOURCES)[Internet]. 2019;26(2 ):225-238. Available from: https://sid.ir/paper/156215/en

IEEE: Copy

A. BARIKLOO, M. SERVATI, and M.S. OLIAEI, “Performance of Ordinary least Squares (OLS) and Bayesian network (BN) in Exchange sodium percentage prediction based on Sodium adsorption Ratio,” JOURNAL OF WATER AND SOIL CONSERVATION (JOURNAL OF AGRICULTURAL SCIENCES AND NATURAL RESOURCES), vol. 26, no. 2 , pp. 225–238, 2019, [Online]. Available: https://sid.ir/paper/156215/en

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