The effect of survey density on the results of geopedological approach in soil mapping : a case study in the Borujen region, Central Iran

Auteur(s) et Affiliation(s)

BORUJENI, E.

Soil Science Dep., College of Agriculture, Univ., Shahrekord, Iran, Republique Islamique d'

SALEHI, M.H.

Soil Science Dep., College of Agriculture, Univ., Shahrekord, Iran, Republique Islamique d'

TOOMANIAN, N.

Agriculture and Natural Resource Research Center, Isfahan, Iran, Republique Islamique d'

MOHAMMADI, J.

Soil Science Dep., College of Agriculture, Univ., Shahrekord, Iran, Republique Islamique d'

POCH, R.M.

Dep. de Medi Ambient i Ciències, Univ. Catalunya, Lleida, Espagne

Description :
This paper examines the influence of sampling intervals on the accuracy of geopedological results in the Borujen region, Central Iran. After a primary interpretation of the study area on air photos (1:20 000), a geomorphic unit that encompassed the maximum surface of the sample area (and also the study area) was selected and was surveyed at 3 different scales: 500, 250 and 125 m intervals. The credibility of generalization of the results of the geopedological approach for the studied unit was tested by comparison with 3 profiles in a similar unit outside the sample area, named the validation area. Comparison of soil types between the unit in the sample area and the validation area at 3 scales indicated that by increasing the taxonomic accuracy, the hidden aspects of the soils may be more identifiable. Therefore, although the geopedological approach tries to distinguish more homogeneous soil mapping units, it still is not able to fully define and represent the variability and apparent chaotic nature of the soils.

Type de document :
Article de périodique

Source :
Catena (Giessen), issn : 0341-8162, 2009, vol. 79, n°. 1, p. 18-26, nombre de pages : 9, Références bibliographiques : 1 p.

Date :
2009

Editeur :
Pays édition : Allemagne, Cremlingen-Destedt, Catena

Langue :
Anglais