TREND SURFACE ANALYSIS AND ITS EFFECTS ON VARIOGRAM MODELING AND MAPPING OF SOME SOIL PROPERTIES

Q: How can I download an article?

To download an article from SID, first log in to the site, search for the article title, and click on the 'Download Article' option.

Q: How can I download an ISI article?

To download an ISI article on SID, enter the keyword or article title in the search bar, view the relevant results, click on the desired article, and select the 'Download Article' option.

Q: How can I access the SID database?

To access the SID database, visit SID.ir, create an account, and log in to access scientific resources.

Q: Is downloading articles from SID free?

Some articles on SID are available for free, while others require payment. Details are specified on the article's page.

MIRZAEE S.; GHORBANI DASHTAKI SH.; MOHAMMADI J.; ASADI H.; ASADZADEH F.

مرکز اطلاعات علمی Scientific Information Database (SID) - Trusted Source for Research and Academic Resources

Journal Paper

Paper Information

Journal: Journal of Water and Soil Conservation Year:2016 | Volume:23 | Issue:1 Page(s): 137-153

Download Full-Text

Persian Verion

View:

828

Download:

Cites:

Information Journal Paper

Title

TREND SURFACE ANALYSIS AND ITS EFFECTS ON VARIOGRAM MODELING AND MAPPING OF SOME SOIL PROPERTIES

Author(s)

Keywords

SURFACE TRENDQ1

NUGGET EFFECTQ1

KRIGINGQ2

Abstract

Background and Objectives: Accuracy of spatial estimation of soil properties such as clay, organic matter and calcium carbonate equivalent is very important in plant nutrition and environmental planning. The most important step before statistical analysis and using geostatistical estimators is data check. In addition to investigation of outlier data and data distribution, another important action in geostatistical studies is trend surface analysis. Analyzing trend surface can evaluate the role of factors such as stone kin, climate, topography and generally regional anomalies. The objective of this study was trend-surface analysis and its effects on variogram modeling and mapping of clay, organic matter and calcium carbonate equivalent.Materials and Methods: For this purpose, 100 surface soil samples in 0-15 cm depth were selected randomly based on different classes area slope from 41353 ha area in Selin plain farmland located in Kaleibar region, East-Azerbaijan. Soil properties such as clay, calcium carbonate equivalent and organic matter were measured by hydrometer, return titration and wet oxidation method, respectively. For analyzing trend surface used multiple regression models which its independent variables was geographical coordinate and dependent variable was soil properties. For zoning clay, organic matter and calcium carbonate equivalent and residuals of removing trend ordinary KRIGING was used. The effect of removing trend surface in variogram modeling and KRIGING estimating were evaluated by cross-validation method with indexes mean error (ME), root mean square error (RMSE) and determination coefficient (R2).Results: Trend surface analysis showed that the best regression models for trend determination of clay, calcium carbonate equivalent and organic matter were first order, first order and quadratic, respectively. Removing the detected trend led to decrease in sill but the NUGGET EFFECT did not change. However, no significant difference was observed between accuracy of KRIGING estimator in presence and removal of trend. This can be attributed to both abnormal manner of environment and activations of human. So that, the regression models of the trends were 35, 18 and 21% of clay, organic matter and calcium carbonate equivalent variations, respectively. However, removing the detected trend led to increase 9.1, 2.7 and 6.6% of R2 for clay, organic matter and calcium carbonate equivalent, respectively.Conclusion: Generally, investigation of trend surface is recommended in soil studies dealing with spatial data, because the trend depends on the location and conditions of the study area as well as the source of the creating trend.

Cites

No record.

References

No record.

Cite

APA: Copy

MIRZAEE, S., GHORBANI DASHTAKI, SH., MOHAMMADI, J., ASADI, H., & ASADZADEH, F.. (2016). TREND SURFACE ANALYSIS AND ITS EFFECTS ON VARIOGRAM MODELING AND MAPPING OF SOME SOIL PROPERTIES. JOURNAL OF WATER AND SOIL CONSERVATION (JOURNAL OF AGRICULTURAL SCIENCES AND NATURAL RESOURCES), 23(1), 137-153. SID. https://sid.ir/paper/156587/en

Vancouver: Copy

MIRZAEE S., GHORBANI DASHTAKI SH., MOHAMMADI J., ASADI H., ASADZADEH F.. TREND SURFACE ANALYSIS AND ITS EFFECTS ON VARIOGRAM MODELING AND MAPPING OF SOME SOIL PROPERTIES. JOURNAL OF WATER AND SOIL CONSERVATION (JOURNAL OF AGRICULTURAL SCIENCES AND NATURAL RESOURCES)[Internet]. 2016;23(1):137-153. Available from: https://sid.ir/paper/156587/en

IEEE: Copy

S. MIRZAEE, SH. GHORBANI DASHTAKI, J. MOHAMMADI, H. ASADI, and F. ASADZADEH, “TREND SURFACE ANALYSIS AND ITS EFFECTS ON VARIOGRAM MODELING AND MAPPING OF SOME SOIL PROPERTIES,” JOURNAL OF WATER AND SOIL CONSERVATION (JOURNAL OF AGRICULTURAL SCIENCES AND NATURAL RESOURCES), vol. 23, no. 1, pp. 137–153, 2016, [Online]. Available: https://sid.ir/paper/156587/en

Related Journal Papers