Consideration of Suffix Symbol on Soil Taxonomy and World Reference Base for Soil Resources Classification

Yeonkyu Sonn; Byunghwan Seo; Woori Go; Sangho Jeon; Byungkeun Hyun; Sungang Yun

doi:10.7745/KJSSF.2019.52.4.345

All Issue

2019 Vol.52, Issue 4 Preview Page Next Page

Short communication

Consideration of Suffix Symbol on Soil Taxonomy and World Reference Base for Soil Resources Classification

30 November 2019. pp. 345-351

PDF XML

Abstract

There is a difference between ST and WRB in distinguishing the master horizon. When a pedologists investigate a soil profile, it is difficult to determine which classification method to choose including the master horizon, add a prefix, suffix, etc. to the horizon name. The suffix symbol for groundwater level uses ‘g’ for ST and ‘l’ or ‘r’ for WRB. The suffix symbol ‘r’ represents a strong reduction state, and ‘l’ is used in a state where oxidation is much progressed. However, in the real agricultural field, the groundwater level is lowered so that the oxidized part of the profile is classified based on < 2%, 2 - 20%, > 20%. In addition, there are soils with a mottle quantity of 20 to 49%. ST classifies this as one like ‘g’, and WRB distinguishes it. However, since only the presence of a mottle is determined, a refinement is required.

The proposals of mottle amounts 'r' in ST & WRB.

Present			Proposals
Mottle quantity	ST	WRB	Mottle quantity	ST	WRB
few (< 2%)	g	l	few (< 2%)	g	l
common (2 - 20%)		r	common (2 - 20%)		r
many (≥ 20%)		r	many (≥ 20%, < 50%)		r

Keywords

Soil Taxonomy

World Reference Base for Soil Resources

Suffix symbol

Designation for layers

References

Field Book for Describing and Sampling Soils. 2012. Ver. 3.0. USDA-NRCS. pp. 2-18.

Guidelines for Soil Description. 2006. Fourth Edition. FAO.

Hyeon, G.S., C.S. Park, S.J. Jung, S.K. Rim, and Y.K. Jo. 1994. Land suitability classification for grape orchards in korea. Res. Rept. RDA(S&F). 36(2):246-250.

Jung, Y.T. 1996. Application of soil taxonomy: Advantage and disadvantage of american soil taxonomy. Korean J. Soil Sci. Fert. 29(2):207-210.

Jung, Y.T., I.S. Son, E.S. Yun, J.K. Kim, S.J. Jung, and G.H. Cho. 1994. A study on the establishment of land suitability grouping for paddy-upland rotation system in Korea. Res. Rept. RDA(S&F). 36(2):262-267.

Jung, Y.T., I.S. Son, E.S. Yun, Y.K. Sonn, and Y.P. No. 1996. Tentative suitability criteria for the consolidation of cultivated upland in korea. J. Korean Soc. Soil Sci. Fert. 29(2):81-85.

Jung, Y.T., S.J. Jung, G.S. Hyeon, Y.K. Sonn, Y.K. Cho, E.S. Yun, and G.H. Cho. 2001. Classification of morphological types of the korean paddy soils for practical use of soil survey results. J. Korean Soc. Soil Sci. Fert. 34(2):77-84.

Keys to Soil Taxonomy. 2014. Twelfth Edition. USDA. pp.335-340.

Soil Survey Manual. 1973. Field Investigation and Classification. No. 1. NIAST, RDA.

Soil Survey Manual. 2017. Soil Science Division Staff. Agriculture Handbook No. 18. USDA. pp.151-152.

Sonn, Y.K., W.R. Go., S.H. Jeon, B.K. Hyun, M.S. Im, and S.G. Yun. 1998. The use of useful statistics of soil texture according to standardized depth between two digital soil maps. Korean J. Soil Sci. Fert. 29(2):564-575.

World Reference Base for Soil Resources. 2014. FAO.

Information

Publisher :Korean Society of Soil Science and Fertilizer
Publisher(Ko) :한국토양비료학회
Journal Title :Korean Journal of Soil Science and Fertilizer
Journal Title(Ko) :한국토양비료학회 학회지
Volume : 52
No :4
Pages :345-351
Received Date : 2019-09-19
Revised Date : 2019-10-28
Accepted Date : 2019-10-29
DOI :https://doi.org/10.7745/KJSSF.2019.52.4.345

Korean Journal of Soil Science and Fertilizer ISSN:0367-6315(Print) 2288-2162(Online) 한국토양비료학회 학회지

All Issue