THE EFFICIENCY OF GEOPEDOLOGIC APPROACH AND THE SOIL SURVEY METHOD ADOPTED IN IRAN IN INCREASING THE PURITY OF SOIL MAP UNITS AND IN DECREASING SURVEY'S COSTS

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GHOLIZADEH A.; MOAMENI A.; BAHRAMI H.; BANAEI H.

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Journal Paper

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Journal: Iranian Journal of Soil Research Year:2001 | Volume:- | Issue:(Special Issue) Page(s): 13-28

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Title

THE EFFICIENCY OF GEOPEDOLOGIC APPROACH AND THE SOIL SURVEY METHOD ADOPTED IN IRAN IN INCREASING THE PURITY OF SOIL MAP UNITS AND IN DECREASING SURVEY'S COSTS

Author(s)

GHOLIZADEH A. | MOAMENI A. | BAHRAMI H. | BANAEI H. | Issue Writer Certificate

Keywords

GEOFORM

LANDSCAPE ANALYSIS

SOIL-LANDFORM RELATIONSHIPS

LOESSIAL SOILS

Abstract

In this research, the 1:20,000 scales semi-detailed soil map of Gonbad-e Ghabous area in Golestan Province (Mosavati, 1986) was compared with a semi-detailed soil map, which was produced at the same scale, using a geopedologic approach. The main objective of this research was to verify the purity of soil map units. The survey efficiency in terms of time and the number of observations, which are needed to satisfactorily accomplish the field survey, was also compared. The mean values of selected soil properties in each soil map unit on the geopedologic map were statistically compared to assess SOIL-LANDFORM RELATIONSHIPS. The electrical conductivity of soil extract (ECe), % clay, % silt,% sand,% CaCO3 and sodium absorption ratio (SAR) were significant at 99% probability level, indicating a strong soil-landform relationship in the studied area. The geopedologic approach led to grouping soils under 4 taxonomic orders. In contrast, only 2 soil orders were distinguished in 1986 soil surveys. More over, 13 map units and 45 map delineations were separated on the geopedologic map, while only 6 map units and 8 map delineations were differentiated on 1986soil map. The strong SOIL-LANDFORM RELATIONSHIPS together with more diversity in soil map units on the geopedologic map indicate less variation in soil properties within each map unit. In other words, the map units separated on the geopedologic map of the studied area is more pure than those delineated on 1986 soil map. The geopedologic approach allows the results obtained in sample areas to be extrapolated to similar areas outside these areas. Thus, more information can be obtained from relatively lower number of identification observations at shorter time, indicating that the geopedologic approach is more cost effective than the soil survey method adopted in Iran.

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APA: Copy

GHOLIZADEH, A., MOAMENI, A., BAHRAMI, H., & BANAEI, H.. (2001). THE EFFICIENCY OF GEOPEDOLOGIC APPROACH AND THE SOIL SURVEY METHOD ADOPTED IN IRAN IN INCREASING THE PURITY OF SOIL MAP UNITS AND IN DECREASING SURVEY'S COSTS. IRANIAN JOURNAL OF SOIL AND WATERS SCIENCES, -((Special Issue)), 13-28. SID. https://sid.ir/paper/530104/en

Vancouver: Copy

GHOLIZADEH A., MOAMENI A., BAHRAMI H., BANAEI H.. THE EFFICIENCY OF GEOPEDOLOGIC APPROACH AND THE SOIL SURVEY METHOD ADOPTED IN IRAN IN INCREASING THE PURITY OF SOIL MAP UNITS AND IN DECREASING SURVEY'S COSTS. IRANIAN JOURNAL OF SOIL AND WATERS SCIENCES[Internet]. 2001;-((Special Issue)):13-28. Available from: https://sid.ir/paper/530104/en

IEEE: Copy

A. GHOLIZADEH, A. MOAMENI, H. BAHRAMI, and H. BANAEI, “THE EFFICIENCY OF GEOPEDOLOGIC APPROACH AND THE SOIL SURVEY METHOD ADOPTED IN IRAN IN INCREASING THE PURITY OF SOIL MAP UNITS AND IN DECREASING SURVEY'S COSTS,” IRANIAN JOURNAL OF SOIL AND WATERS SCIENCES, vol. -, no. (Special Issue), pp. 13–28, 2001, [Online]. Available: https://sid.ir/paper/530104/en

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