Arid
DOI10.2136/sssaj2017.01.0019
Semiquantitative Evaluation of Secondary Carbonates via Portable X-ray Fluorescence Spectrometry
Chakraborty, Somsubhra1; Weindorf, David C.2; Weindorf, Camille A.3; Das, Bhabani S.1; Li, Bin4; Duda, Bogdan2; Pennington, Sarah2; Ortiz, Rebekah2
通讯作者Weindorf, David C.
来源期刊SOIL SCIENCE SOCIETY OF AMERICA JOURNAL
ISSN0361-5995
EISSN1435-0661
出版年2017
卷号81期号:4页码:844-852
英文摘要

Secondary CaCO3 is commonly found in soils of arid and semiarid regions in variable states of development as Bk, Bkk, Bkkm, Ck, or, more rarely, Ak horizons. Historically, a qualitative scale featuring various stages of development has been applied when evaluating carbonate-laden soils. By contrast, this study used portable X-ray fluorescence spectrometry to determine the soil Ca concentration of 75 soil samples from four US states in relation to developmental stage, as determined independently by five pedologists from the USDA-NRCS Soil Survey Staff. Although they were experienced, the evaluators unanimously agreed on the carbonate development stage on only 22.6% of the samples while evaluating the samples ex situ. Portable X-ray fluorescence-determined Ca content generally increased from Development Stage I through VI for intact aggregates as well as ground soil samples. The widest variation in Ca content was found in Stage III for both conditions. No substantive differences in Ca content were observed between Stages V and VI. A strong positive correlation was observed between the Ca content of intact aggregates vs. ground soil samples (r = 0.89). Both support vector machine classification and interpretable rules were used to classify secondary carbonate development stages using total Ca concentrations for intact aggregates and ground soil. Using scans of both conditions offers stronger predictive ability than either condition independently. Portable X-ray fluorescence provides an important analytical tool available to field soil scientists for evaluation of soils containing Ca as part of CaCO3.


类型Article
语种英语
国家India ; USA
收录类别SCI-E
WOS记录号WOS:000409298400014
WOS关键词CHARACTERIZING SOILS ; TEXAS
WOS类目Soil Science
WOS研究方向Agriculture
资源类型期刊论文
条目标识符http://119.78.100.177/qdio/handle/2XILL650/202485
作者单位1.Indian Inst Technol Kharagpur, Agr & Food Engn Dept, Kharagpur, W Bengal, India;
2.Texas Tech Univ, Dep Plant & Soil Sci, Lubbock, TX 79409 USA;
3.Irons Middle Sch, Lubbock, TX 79409 USA;
4.Louisiana State Univ, Dep Expt Stat, Baton Rouge, LA 70803 USA
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Chakraborty, Somsubhra,Weindorf, David C.,Weindorf, Camille A.,et al. Semiquantitative Evaluation of Secondary Carbonates via Portable X-ray Fluorescence Spectrometry[J],2017,81(4):844-852.
APA Chakraborty, Somsubhra.,Weindorf, David C..,Weindorf, Camille A..,Das, Bhabani S..,Li, Bin.,...&Ortiz, Rebekah.(2017).Semiquantitative Evaluation of Secondary Carbonates via Portable X-ray Fluorescence Spectrometry.SOIL SCIENCE SOCIETY OF AMERICA JOURNAL,81(4),844-852.
MLA Chakraborty, Somsubhra,et al."Semiquantitative Evaluation of Secondary Carbonates via Portable X-ray Fluorescence Spectrometry".SOIL SCIENCE SOCIETY OF AMERICA JOURNAL 81.4(2017):844-852.
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