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The Use of Remote Sensing to Assess the Effects of Water Stress on Wheat

Published online by Cambridge University Press:  03 October 2008

R. K. Mahey ,
Rajwant Singh ,
S. S. Sidhu  and
R. S. Narang
R. K. Mahey
Affiliation:
Department of Agronomy, Punjab Agricultural University, Ludhiana-141 004, India
Rajwant Singh
Affiliation:
Department of Agronomy, Punjab Agricultural University, Ludhiana-141 004, India
S. S. Sidhu
Affiliation:
Department of Agronomy, Punjab Agricultural University, Ludhiana-141 004, India
R. S. Narang
Affiliation:
Department of Agronomy, Punjab Agricultural University, Ludhiana-141 004, India
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Summary

Ground-based radiometric measurements in the red and infrared bands were used to monitor the growth and development of wheat under irrigated and stressed conditions throughout the 1987–88 and 1988–89 growth cycles. Spectral data were correlated with plant height, leaf area index, total fresh and total dry biomass, plant water content and grain yield. The radiance ratio (R) and normalized difference vegetation index (NDVI) were highly and linearly correlated with yield, establishing the potential which remote sensing has for predicting grain yield. The correlation for R and NDVI was at a maximum between 75 and 104 days after sowing, corresponding with maximum green crop canopy cover. The differences in spectral response over time between irrigated and unirrigated crops allowed detection of water stress effects on the crop, indicating that a hand-held radiometer can be used to collect spectral data which can supply information on wheat growth and development.

Efectos de lafalta de agua en el trigo

Type
Research Article
Information
Experimental Agriculture , Volume 27 , Issue 4 , October 1991 , pp. 423 - 429
Copyright
Copyright © Cambridge University Press 1991

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References

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