IMPROVING THE ESTIMATION OF SOIL SURFACE PROPERTIES USING COMBINATION OF CONVENTIONAL SOIL MAP WITH KRIGING

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SALEHI M.H.; MOHAMMADI J.; KHADEMI H.; KARIMIAN EGHBAL M.

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Paper Information

Journal: THE SCIENTIFIC JOURNAL OF AGRICULTURE (SJA) Year:2008 | Volume:30 | Issue:4-B Page(s): 93-106

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Title

IMPROVING THE ESTIMATION OF SOIL SURFACE PROPERTIES USING COMBINATION OF CONVENTIONAL SOIL MAP WITH KRIGING

Author(s)

SALEHI M.H. | MOHAMMADI J. | KHADEMI H. | KARIMIAN EGHBAL M. | Issue Writer Certificate

Keywords

CONVENTIONAL SOIL MAPQ3

KRIGINGQ3

SOIL SPATIAL VARIABILITYQ3

VARIOGRAMQ3

Abstract

Accuracy of estimations made by CONVENTIONAL SOIL MAPs is low because they do not take in account the spatial variability of soil properties. In this study, a new idea in order to improve the quality and accuracy of predictions of a CONVENTIONAL SOIL MAP is introduced. To do this, a detailed soil map of Farrokhshahr area located in Chaharmahal and Bakhtiari province was combined with KRIGING maps of seven soil surface properties including percentage of CaCO3, clay, silt, sand, gravel, organic matter and the thickness of A horizon. The results showed a considerable bias in the predictions made with the CONVENTIONAL SOIL MAP in comparison with KRIGING and combined methods. According to mean square error (MSE) index, soil map predictions were also less accurate than the two other predictors. Mean absolute error (MAE) index indicated that predictions of the combined procedure were mostly unbiased and accurate although some bias and accuracy differences found with two other predictors, particularly KRIGING, for some soil properties were not very large. In situations where SOIL SPATIAL VARIABILITY lies somewhere between abrupt and gradual changes and also lack of alternative methods, the weighted linear combination of KRIGING-soil map procedure can be used as a valuable tool for improving the quality of CONVENTIONAL SOIL MAPs.

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APA: Copy

SALEHI, M.H., MOHAMMADI, J., KHADEMI, H., & KARIMIAN EGHBAL, M.. (2008). IMPROVING THE ESTIMATION OF SOIL SURFACE PROPERTIES USING COMBINATION OF CONVENTIONAL SOIL MAP WITH KRIGING. THE SCIENTIFIC JOURNAL OF AGRICULTURE (SJA), 30(4-B), 93-106. SID. https://sid.ir/paper/24779/en

Vancouver: Copy

SALEHI M.H., MOHAMMADI J., KHADEMI H., KARIMIAN EGHBAL M.. IMPROVING THE ESTIMATION OF SOIL SURFACE PROPERTIES USING COMBINATION OF CONVENTIONAL SOIL MAP WITH KRIGING. THE SCIENTIFIC JOURNAL OF AGRICULTURE (SJA)[Internet]. 2008;30(4-B):93-106. Available from: https://sid.ir/paper/24779/en

IEEE: Copy

M.H. SALEHI, J. MOHAMMADI, H. KHADEMI, and M. KARIMIAN EGHBAL, “IMPROVING THE ESTIMATION OF SOIL SURFACE PROPERTIES USING COMBINATION OF CONVENTIONAL SOIL MAP WITH KRIGING,” THE SCIENTIFIC JOURNAL OF AGRICULTURE (SJA), vol. 30, no. 4-B, pp. 93–106, 2008, [Online]. Available: https://sid.ir/paper/24779/en

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