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.

Trends and growth rate analysis are extensively employed in the agricultural sector as these have significant policy implications. The present study was commenced to design a methodology to fit trends in the three phases of different Gram crops grown in Tamil Nadu state using nonparametric regression. Relative growth rates were calibrated based on non-parametric regression model. On average, the percentage growth rate values obtained in the years 1950-1951 to 2009-2010 for the three phases of different grams crops showed that production increased with a rate of 6.0, which has been at a rate of 2.89 and 3.21 per cent per year due to the combined effect of area and productivity.