Pre-harvest wheat yield and production estimation for the Punjab, India
| Autor: | O. P. Jhorar, N. D. Ajwani, Manik H. Kalubarme, S. S. Cheema, R. P. Dubey, Ranganath R. Navalgund, V. N. Sridhar, R. S. Na Rang, R. K. Mahey, S. S. Sidhu |
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| Rok vydání: | 1994 |
| Předmět: | |
| Zdroj: | International Journal of Remote Sensing. 15:2137-2144 |
| ISSN: | 1366-5901 0143-1161 |
| DOI: | 10.1080/01431169408954232 |
| Popis: | Two different approaches to relate wheat yield with spectral indices derived from remotely-sensed data have been explored for the state of Punjab, India. In the study based on site-level approach yield obtained from crop-cutting sites was found to be linearly related to NIR/Red ratio derived from Landsat MSS data of corresponding sites in Ludhiana and Patiala districts of Punjab. Incorporation of agrometeorological data was also tried. Certain inherent limitations of the site-level approach led to the district-level studies which focused on the relation of district yields with corresponding average spectral indices derived from satellite sensors like Landsat MSS and lRS-LISS-i. Significant correlations were observed in all cases and the relation based on Landsat MSS/IRS LISS-I data was used for trial forecast of wheat yields for 1989–90 season. A comparison of remote-sensing based production forecast showed good agreement with the conventional estimate of Bureau of Economics and Statistics at sta... |
| Databáze: | OpenAIRE |
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