Pedosphere 18(2): 163--170, 2008
ISSN 1002-0160/CN 32-1315/P
©2008 Soil Science Society of China
Published by Elsevier B.V. and Science Press
| Estimation of some chemical properties of an agricultural soil by spectroradiometric measurements |
T. JARMER1 , M. VOHLAND2, H. LILIENTHAL3 and E. SCHNUG3 |
1 Remote Sensing and Geoinformatics, Institute for Geographical Sciences, Freie Universität Berlin, D-12249 Berlin (Cermnny). E-mail: jarmer.geog.fu-berlin.de;
2 Remote Sensing and Geoinforntatics, Faculty of Geography/Geosciences, University of Trier, D-54286 Truer (Germany);
3 Federal Agricultural Resea}h Centre (FAL), Institute of Pdant Nutrition and Soil Science, D-38116 Branurtschweig (Germany) |
| ABSTRACT |
| The contents of nitrogen and organic carbon in an agricultural soil were analyzed using reflectance measurements (n=52) performed with an ASD Field Spec-Ⅱ spectroradiometer. For parameter prediction, empirical models based on partial least squares (PLS) regression were defined from the measured reflectance spectra (0.4 to 2.4μm). Here, reliable estimates were obtained for nitrogen content, but prediction accuracy was only moderate for organic carbon. For nitrogen, the real spatial pattern of within-field variability was reproduced with high accuracy. The results indicate the potential of this method as a quick screening tool for the spatial assessment of nitrogen and organic carbon, and therefore an appropriate alternative to time-and cost-intensive chemical analysis in the laboratory. |
| Key Words: agricultural soil, nitrogen, organic carbon, partial least squares regression, spectroradiometric measurements |
| Citation: Jarmer, T., Vohland, M., Lilienthal, H. and Schnug, E. 2008. Estimation of some chemical properties of an agricultural soil by spectroradiometric measurements. Pedosphere. 18(2): 163-170. |
|
View Full Text
|
|
|
|
