Potential of on-line visible and near infrared spectroscopy for measurement of pH for deriving variable rate lime recommendations
| dc.contributor.author | Tekin, YĆ¼cel | - |
| 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 | - |
| 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.identifier.citation | YĆ¼cel 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. | |
| dc.identifier.issn | 1424-8220 | - |
| dc.identifier.uri | http://dx.doi.org/10.3390/s130810177 | - |
| dc.identifier.uri | http://dspace.lib.cranfield.ac.uk/handle/1826/8143 | |
| dc.language.iso | en_UK | - |
| dc.publisher | MDPI | 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 | - |