Confirmation of the airborne biogeophysical mineral exploration technique using laboratory methods

Chang, Sheng-Huei; Collins, W. D.

doi:10.2113/gsecongeo.78.4.723

Cited by 103 publications

(16 citation statements)

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“…Further, it has widely been reported (Chang andCollins 1983, Banninger 1990, among many others) that vegetation under stress shows a decrease in reflectance of the near infrared bands (750-1300 nm), a reduced red absorption in the chlorophyll active band (680nm) and a consequent blue shift of the red edge. Thus, by relating reflectance changes to physiological parameters, such as plant composition, green biomass or canopy geometry, analysis of canopy reflectance can be used to derive indicators that are representative of crop conditions.…”

Section: Introductionmentioning

confidence: 97%

Radiometric characteristics of Triticum aestivum cv, Astral under water and nitrogen stress

Fernández

Vidal

Simón

et al. 1994

International Journal of Remote Sensing

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The effect of nitrogen fertilization and water stress on the spectral signature of winter wheat Triticum aestivum cv. Astral were measured with a field radiometer over two years. Spectral reflectance of the canopy has been related to the most indicative physiological parameters (nitrogen and photosynthetic pigment content, biomass, leaf area and LAI), but only a few of these parameters can be estimated independently of plant treatment.The normalized difference vegetation index seems the most powerful spectral combination with which to estimate the total area of plant leaves and LAI. The nitrogen content of plants can also be related to a linear combination of green and red canopy refleetances independently of plant treatment. Relations between canopy reflectance and other physiological parameters are not independent of plant treatment.

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Section: Introductionmentioning

confidence: 97%

Radiometric characteristics of Triticum aestivum cv, Astral under water and nitrogen stress

Fernández

Vidal

Simón

et al. 1994

International Journal of Remote Sensing

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“…The latter is termed the red edge position (REP). Shifts in the REP to longer or shorter wavelengths has been used as a means to estimate changes in foliar chlorophyll content and also as an indicator of vegetation stress (Chang & Collins, 1983;Clevers et al, 2002;Curran et al, 1995;Horler et al, 1983;Lamb et al, 2002;Smith et al, 2004).…”

Section: Introductionmentioning

confidence: 99%

A new technique for extracting the red edge position from hyperspectral data: The linear extrapolation method

Cho¹,

Skidmore²

2006

Remote Sensing of Environment

447

239

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“…For example, the spectral shift of the cholorphyll absorption edge (the 'red edge'), associated with crop phenological state and mineral-stressed vegetation, is not . accessible with broad-band sensors and was discovered through the simultaneous investigation of controlled laboratory experiments and field-acquired high spectral resolution measurements (Collins 1978, Chang andCollins 1983). A history of foliar analysis using near-infrared (NIR) spectroscopy lends further support to the conceptof high information content in the fine structure of the reflectance spectrum (Norris et 01.…”

Section: Introductionmentioning

confidence: 99%

An evaluation of imaging spectrometry for estimating forest canopy chemistry

Wessman

Aber

Peterson

1989

International Journal of Remote Sensing

120

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High spectral resolution Airborne Imaging Spectrometer (AIS) data were acquired over 20 well-studied Wisconsin forest sites to evaluate the potential of remote sensing for estimating forest canopy chemistry. Intensive nutrient cycling research in these forests demonstrates that canopy lignin content is strongly related to measured annual nitrogen mineralization at the undisturbed sites and may serve as an accurate index for nitrogen cycling rates. Ground measurements were made of foliar biomass and canopy nitrogen and lignin content, the latter within two weeks of the AIS overflight. The spectral data were transformed using derivative techniques modified from laboratory spectroscopy.Stepwise regression assisted in determining combinations of wavelengths most highly correlated with canopy chemistry and biomass. Strong correlations between AIS data and total canopy lignin content in deciduous forests and canopy lignin concentration (total lignin/biomass) in both deciduous and coniferous stands indicate that imaging spectrometry can be used to estimate canopy lignin content and, from that, the spatial distribution of annual nitrogen mineralization rates.

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Confirmation of the airborne biogeophysical mineral exploration technique using laboratory methods

Cited by 103 publications

References 0 publications

Radiometric characteristics of Triticum aestivum cv, Astral under water and nitrogen stress

Radiometric characteristics of Triticum aestivum cv, Astral under water and nitrogen stress

A new technique for extracting the red edge position from hyperspectral data: The linear extrapolation method

An evaluation of imaging spectrometry for estimating forest canopy chemistry

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