Pre-harvest wheat yield and production estimation for the Punjab, India
作者:
R. P. DUBEY,
N. AJWANI,
M. H. KALUBARME,
V. N. SRIDHAR,
R. R. NAVALGUND,
R. K. MAHEY,
S. S. SIDHU,
O. P. JHORAR,
S. S. CHEEMA,
R. S. NA RANG,
期刊:
International Journal of Remote Sensing
(Taylor Available online 1994)
卷期:
Volume 15,
issue 10
页码: 2137-2144
ISSN:0143-1161
年代: 1994
DOI:10.1080/01431169408954232
出版商: Taylor & Francis Group
数据来源: Taylor
摘要:
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 state level although at district level, deviations were larger.
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