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Open AccessArticle

Spectral Reflectance of Wheat Residue during Decomposition and Remotely Sensed Estimates of Residue Cover

1
USDA-ARS Hydrology and Remote Sensing Laboratory, 10300 Baltimore Avenue, Beltsville, MD 20705, USA
2
ASRC Management Services, USDA-FAS Office of Global Analysis, Washington, DC, 20250, USA
3
USDA-ARS Environmental Management and Byproduct Utilization Laboratory, Beltsville, MD 20705, USA
*
Author to whom correspondence should be addressed.
Remote Sens. 2010, 2(2), 416-431; https://doi.org/10.3390/rs2020416
Received: 23 December 2009 / Revised: 20 January 2010 / Accepted: 21 January 2010 / Published: 27 January 2010
Remotely sensed estimates of crop residue cover (fR) are required to assess the extent of conservation tillage over large areas; the impact of decay processes on estimates of residue cover is unknown. Changes in wheat straw composition and spectral reflectance were measured during the decay process and their impact on estimates of fR were assessed. Proportions of cellulose and hemicellulose declined, while lignin increased. Spectral features associated with cellulose diminished during decomposition. Narrow-band spectral residue indices robustly estimated fR, while broad-band indices were inconsistent. Advanced multi-spectral sensors or hyperspectral sensors are required to assess fR reliably over diverse agricultural landscapes. View Full-Text
Keywords: crop residue cover; lignin; cellulose; reflectance spectra; cellulose absorption index; decomposition; plant litter crop residue cover; lignin; cellulose; reflectance spectra; cellulose absorption index; decomposition; plant litter
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Daughtry, C.S.T.; Serbin, G.; Reeves, J.B., III; Doraiswamy, P.C.; Hunt, E.R., Jr. Spectral Reflectance of Wheat Residue during Decomposition and Remotely Sensed Estimates of Residue Cover. Remote Sens. 2010, 2, 416-431.

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