Sovremennye problemy distantsionnogo zondirovaniya Zemli iz kosmosa, 2010, Vol. 7, No. 3, pp. 305-314
Empirical relations between the elements of the productivity of spring
wheat of Northern Kazakhstan and spectral characteristics of the
fields according to the EOS MODIS for season 2005-2009
Space Research Institute
Join-stock company National Centre of the Space Research and Technology, 050010 Kazakhstan, Almaty,15 Shevchenko
The empirical relationships between the value of satellite vegetation index of WDVI (Weighted Difference Vegetation
Index) which recorded during the period of flowering of culture, and main elements of productivity of spring
wheat in Northern Kazakhstan are analyzed. It is found that the number of productive stems per square meter is characterized
by the expression of correlation with the values WDVI. The size of the ear and its grain content did not
have a clear relationship with WDVI of wheat fields for the phase of flowering. However, the most important ratio
for predicting the yield of grain between WDVI of wheat fields during the flowering period and the expected yields
are relatively close to the empirical linear regression equations on the scale of individual regions according to 2005-
2009. Thus, amount of annually necessary ground-based information can be substantially reduced or even replaced
by results of processing of meteorological data for the problem of satellite month lead time forecast of grain yields
in Northern Kazakhstan on the basis of empirical relations.
Keywords: vegetation index, the forecast of yield of cereals crops, empirical relations, the elements of productivity of spring wheat
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