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5. CONCLUSIONS
The above studies showed that there exists sufficiently large
amount of variability in both soil and crop parameters, even in
small fields of around 4 ha area. This variability could be captured
by both ground based and satellite based spectral indices. The
narrow-band vegetation indices were significantly correlated to
crop parameters. Further study is needed to find out better
spectral indices to relate with soil parameters. Compared to
satellite data, the ground based spectroradiometer data were more
useful in analysing and correlating the crop and soil variability.
Hence, there is strong need of very high resolution multi-spectral
satellite based RS data, to study within field variability.
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ACKNOWLEDGEMENTS
Authors are grateful to Shri J.S. Parihar, the Group Director,
Agricultural Resources Group, SAC for his keen interest in this
work. Thanks are due to Dr. S.S. Lal and Dr. G.S. Kang of CPRI
for their co-operation for the field experiments.