ESTIMATING SOIL CATION EXCHANGE CAPACITY (IN VIEW OF PEDOTRANSFER FUNCTIONS) USING REGRESSION AND ARTIFICIAL NEURAL NETWORKS AND THE EFFECT OF DATA PARTITIONING ON ACCURACY AND PRECISION OF FUNCTIONS

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MOHAJER R.; SALEHI MOHAMMAD HASAN; BEYGI HARCHEGANI H.A.

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Journal: Journal of Water and Soil Science Year:2009 | Volume:13 | Issue:49 Page(s): 83-97

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Title

ESTIMATING SOIL CATION EXCHANGE CAPACITY (IN VIEW OF PEDOTRANSFER FUNCTIONS) USING REGRESSION AND ARTIFICIAL NEURAL NETWORKS AND THE EFFECT OF DATA PARTITIONING ON ACCURACY AND PRECISION OF FUNCTIONS

Author(s)

MOHAJER R. | SALEHI MOHAMMAD HASAN | BEYGI HARCHEGANI H.A. | Issue Writer Certificate

Keywords

CATION EXCHANGE CAPACITY (CEC)Q2

PEDOTRANSFERQ2

REGRESSIONQ2

ARTIFICIAL NEURAL NETWORKQ2

SOIL PARTITIONINGQ3

Abstract

Soil fertility measures such as cation exchange capacity (CEC) may be used in upgrading soil maps and improving their quality. Direct measurement of CEC is costly and laborious. Indirect estimation of CEC via PEDOTRANSFER functions, therefore, may be appropriate and effective. Several delineations of two consociation map units consisting of two soil families, Shahrak series and Chaharmahal series, located in Shahrekord plain were identified. Soil samples were taken from two depths of 0-20 and 30-50 cm and were analyzed for several physico-chemical properties. Clay and organic matter percentages as well as moisture content at -1500 kPa correlated best with CEC. PEDOTRANSFER functions were successfully developed using REGRESSION and ARTIFICIAL NEURAL NETWORKs. In this research, it seemed that one hidden layer with one node was sufficient for all neural networks models. The best REGRESSION model consisting of organic matter and clay variables showed R2=0.81 and RMSE=7.2 while best corresponding neural network with a learning coefficient of 0.3 and an epoch of 40 had R2=0.88 and RMSE=0.34. Data partitioning according to soil series and soil depths increased the accuracy and precision of the functions. Compared to REGRESSION, ARTIFICIAL NEURAL NETWORK technique gave PEDOTRANSFER functions with greater R2 and smaller RMSE.

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APA: Copy

MOHAJER, R., SALEHI, MOHAMMAD HASAN, & BEYGI HARCHEGANI, H.A.. (2009). ESTIMATING SOIL CATION EXCHANGE CAPACITY (IN VIEW OF PEDOTRANSFER FUNCTIONS) USING REGRESSION AND ARTIFICIAL NEURAL NETWORKS AND THE EFFECT OF DATA PARTITIONING ON ACCURACY AND PRECISION OF FUNCTIONS. WATER AND SOIL SCIENCE (JOURNAL OF SCIENCE AND TECHNOLOGY OF AGRICULTURE AND NATURAL RESOURCES), 13(49), 83-97. SID. https://sid.ir/paper/14850/en

Vancouver: Copy

MOHAJER R., SALEHI MOHAMMAD HASAN, BEYGI HARCHEGANI H.A.. ESTIMATING SOIL CATION EXCHANGE CAPACITY (IN VIEW OF PEDOTRANSFER FUNCTIONS) USING REGRESSION AND ARTIFICIAL NEURAL NETWORKS AND THE EFFECT OF DATA PARTITIONING ON ACCURACY AND PRECISION OF FUNCTIONS. WATER AND SOIL SCIENCE (JOURNAL OF SCIENCE AND TECHNOLOGY OF AGRICULTURE AND NATURAL RESOURCES)[Internet]. 2009;13(49):83-97. Available from: https://sid.ir/paper/14850/en

IEEE: Copy

R. MOHAJER, MOHAMMAD HASAN SALEHI, and H.A. BEYGI HARCHEGANI, “ESTIMATING SOIL CATION EXCHANGE CAPACITY (IN VIEW OF PEDOTRANSFER FUNCTIONS) USING REGRESSION AND ARTIFICIAL NEURAL NETWORKS AND THE EFFECT OF DATA PARTITIONING ON ACCURACY AND PRECISION OF FUNCTIONS,” WATER AND SOIL SCIENCE (JOURNAL OF SCIENCE AND TECHNOLOGY OF AGRICULTURE AND NATURAL RESOURCES), vol. 13, no. 49, pp. 83–97, 2009, [Online]. Available: https://sid.ir/paper/14850/en

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