Estimation of sugarcane leaf nitrogen concentration using in situ spectroscopy

The aim of this study was to explore the use of in situ spectroscopy for estimating sugarcane leaf nitrogen (N) concentration. Leaf spectral reflectance was measured using a field spectroradiometer in the 350–2500nm range from sugarcane variety N19 crops of 6–7 months old under on-farm conditions. L...

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Veröffentlicht in:	International journal of applied earth observation and geoinformation 2010-02, Vol.12, p.S52-S57
Hauptverfasser:	Abdel-Rahman, Elfatih M., Ahmed, Fethi B., van den Berg, Maurits
Format:	Artikel
Sprache:	eng
Schlagworte:	Correlation Crops Derivatives Earth Hyperspectral In situ spectroscopy Mean square values Nitrogen Reflectivity Spectral reflectance Spectroscopy Sugarcane
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Zusammenfassung:	The aim of this study was to explore the use of in situ spectroscopy for estimating sugarcane leaf nitrogen (N) concentration. Leaf spectral reflectance was measured using a field spectroradiometer in the 350–2500nm range from sugarcane variety N19 crops of 6–7 months old under on-farm conditions. Lab-determined leaf N concentrations of the samples taken ranged from 1.00% to 1.55%. Vegetation indices based on simple ratio (SR); viz. SR (743, 1316), SR (743, 1317) and SR (741, 1323) generated from first-order derivatives of leaf reflectance showed the best correlation with leaf N concentration, with r2 values of 0.76 (P
ISSN:	1569-8432 1872-826X
DOI:	10.1016/j.jag.2009.11.003