Temporal prediction of nitrogen status in wheat under the influence of water deficiency using spectral and thermal information

Christensen, L. K., Rodriguez, D., Belford, R., Sadras, V., Rampant, P. and Fisher, P. (2005). Temporal prediction of nitrogen status in wheat under the influence of water deficiency using spectral and thermal information. In: Precision Agriculture 05. 5th European Conference on Precision Agriculture/2nd European Conference Precision Livestock Farming, Uppsala, Sweden, (209-215). 9-12 June 2005.

Author Christensen, L. K.
Rodriguez, D.
Belford, R.
Sadras, V.
Rampant, P.
Fisher, P.
Title of paper Temporal prediction of nitrogen status in wheat under the influence of water deficiency using spectral and thermal information
Conference name 5th European Conference on Precision Agriculture/2nd European Conference Precision Livestock Farming
Conference location Uppsala, Sweden
Conference dates 9-12 June 2005
Proceedings title Precision Agriculture 05
Journal name Precision Agriculture 05
Place of Publication Wageningen, The Netherlands
Publisher Wageningen Academic Publishers
Publication Year 2005
Sub-type Fully published paper
ISBN 9789076998695
9076998698
Start page 209
End page 215
Total pages 6
Language eng
Formatted Abstract/Summary
Variable rate technologies and the site-specific management of crop nutrients require real-time spatial information about the potential for response to in-crop management interventions. The spectral and thermal properties of crop canopies could provide relevant information nondestructively and quickly enough to be used by these technologies.

This study aimed to develop indices of the physiological status of wheat canopies that could help to spatially determine the potential for response to in-crop nitrogen fertilisation. Using a digital thermal imaging system and a full range field spectrometer we characterised the thermal and spectral properties of wheat canopies, respectively, growing under different levels of nitrogen, water supply and plant density.

Preliminary results indicate that the combination of thermal and spectral properties of canopies may potentially be used to identify areas in the field under different degree of water and nitrogen stress.
Keyword Spectral Response
Thermal Imaging
Crop Stress Index
Nitrogen
Wheat
Q-Index Code E1
Q-Index Status Provisional Code
Institutional Status Non-UQ

 
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Created: Mon, 07 Mar 2011, 15:22:01 EST