The present investigation was carried out to study the trends in area, production and productivity of wheat crop grown during the period 1950-1951 to 2009-2010 in India. Different non-linear models were emp loyed to study the trends in area, production and productivity. When none of the non-linear models were found suitable to fit the trends nonparametric regression model was emp loyed. None o f the non-linear model was found suitable to fit the trends in area data. The Sinusoidal model was found suitable to fit the trends in production as well as productivity of wheat crop grown in Ind ia. The results indicated that area, production and productivity of wheat crop grown in India, had been shown in the increasing trend. The area of cult ivation had played a major ro le in increasing the trend in production.
A new procedure for construction of a pair-wise balanced design with equal replication and un-equal block sizes based on factorial design are presented. Numerical illustration also provided. It was found that the constructed pair-wise balanced design was found to be universal optimal.
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