dc.contributor.author |
Tekin, Yücel |
- |
dc.contributor.author |
Kuang, Boyan Y. |
- |
dc.contributor.author |
Mouazen, Abdul Mounem |
- |
dc.date.accessioned |
2014-01-24T05:04:14Z |
|
dc.date.available |
2014-01-24T05:04:14Z |
|
dc.date.issued |
2013-08-08T00:00:00Z |
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dc.identifier.citation |
Yücel Tekin, Boyan Kuang and Abdul M. Mouazen, Potential of on-line visible and near infrared spectroscopy for measurement of pH for deriving variable rate lime recommendations, Sensors, 2013, Volume 13, Issue 8, Pages 10177-10190. |
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dc.identifier.issn |
1424-8220 |
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dc.identifier.uri |
http://dx.doi.org/10.3390/s130810177 |
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dc.identifier.uri |
http://dspace.lib.cranfield.ac.uk/handle/1826/8143 |
|
dc.description.abstract |
This paper aims at exploring the potential of visible and near infrared (vis-NIR) spectroscopy for on-line measurement of soil pH, with the intention to produce variable rate lime recommendation maps. An on-line vis-NIR soil sensor set up to a frame was used in this study. Lime application maps, based on pH predicted by vis-NIR techniques, were compared with maps based on traditional lab-measured pH. The validation of the calibration model using off-line spectra provided excellent prediction accuracy of pH (R2 = 0.85, RMSEP = 0.18 and RPD = 2.52), as compared to very good accuracy obtained with the on-line measured spectra (R2 = 0.81, RMSEP = 0.20 and RPD = 2.14). On-line predicted pH of all points (e.g., 2,160) resulted in the largest overall field virtual lime requirement (1.404 t), as compared to those obtained with 16 validation points off-line prediction (0.28 t), on-line prediction (0.14 t) and laboratory reference measurement (0.48 t). The conclusion is that the vis-NIR spectroscopy can be successfully used for the prediction of soil pH and for deriving lime recommendations. The advantage of the on-line sensor over sampling with limited number of samples is that more detailed information about pH can be obtained, which is the reason for a higher but precise calculated lime recommendation rate. |
en_UK |
dc.language.iso |
en_UK |
- |
dc.publisher |
MDPI AG |
en_UK |
dc.title |
Potential of on-line visible and near infrared spectroscopy for measurement of pH for deriving variable rate lime recommendations |
en_UK |
dc.type |
Article |
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