Penetrometer-mounted VisNIR spectroscopy: Application of EPO-PLS to in situ VisNIR spectra
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- 作者：Jason P. Ackersona ; jackers2@tamu.edu" class="auth_mail" title="E-mail the corresponding author ; C.L.S. Morgana ; Y. Geb
- 关键词：EPO ; External parameter orthogonalization ; PLS ; Partial least squares ; VisNIR ; Visible ; near infrared spectroscopy ; RMSE ; Root mean squared error
- 刊名：Geoderma
- 出版年：2017
- 出版时间：15 January 2017
- 年：2017
- 卷：286
- 期：Complete
- 页码：131-138
- 全文大小：1019 K
文摘
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We collected in-situ VisNIR spectra using a penetrometer-mounted VisNIR probe.
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We used orthogonal projection to remove effects of water from in situ spectra.
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Partial least squares models for clay content were calibrated using air-dry soils.
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Projection allowed air-dry models to predict clay content for field-moist spectra.
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The penetrometer-mounted VisNIR measured clay content profiles at high-depth-resolution