Comparision of artificial neural network and regressionpedotransfer functions for istimation of soil cation exchange capacity in northwest of Iran

Barikloo, Ali; Nikbakht, Jafar

Document Type : Original Article

Authors

Ali Barikloo ¹
jafar nikbakht ²

¹ departement of soil science, faculty of ariculture, university of Zanjan, Iran

² Department of water engineering , faculty of agriculture, university of zanjan, iran

Abstract

Soil cation exchange capacity (CEC) is defined as the amount of positive charge that can be exchanged per mass of soil. Modeling and estimating of CEC is a useful index of soil fertility. Assessing and designing various management scenarios requires having accurate information regarding the soil data bank. In order to estimate the soil CEC, 32 profiles were dug in Tabriz plain, and 131 different samples were collected from different depths and physiochemical experiments such as particle size distribution, organic carbon, pH and CEC of soil samples were performed. Then using seven regression models that were selected based on previous studies, were calibrated and evaluated for the study area. Also seven different architectures of artificial neural networks were designed to predict the CEC of soil and the results of artificial neural networks and multivariate regression models were evaluated using correlation coefficient (R²), root mean square error (RMSE). Results revealed that artificial neural network with R² = 0.86 and RMSE= 2.14 is better than regression based functions due to the existence of nonlinear relations between the easily available soil properties (independent variables) and the CEC (dependent variable).

Keywords

References

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Applied Soil Research

Comparision of artificial neural network and regressionpedotransfer functions for istimation of soil cation exchange capacity in northwest of Iran

References

References

Volume 8, Issue 1 - Serial Number 1
May 2020
Pages 174-186

Comparision of artificial neural network and regressionpedotransfer functions for istimation of soil cation exchange capacity in northwest of Iran

References

References

Volume 8, Issue 1 - Serial Number 1May 2020Pages 174-186

Volume 8, Issue 1 - Serial Number 1
May 2020
Pages 174-186