Jain, MukeshKamat, Vivek R.2020-01-312020-01-312019http://krishikosh.egranth.ac.in/handle/1/5810142244A mathematical model was developed to predict P.T.O power requirement of the tractor for operating rotavator, tractor operated gun sprayer, tractor operated VCR and paddy thresher. Mathematical models were developed by using 80 % of the secondary data collected from the test reports released by different authorized testing centres. Three different regression analyses such as multiple linear regressions, weighted least square and stepwise regression models were used to predict the P.T.O power requirement. Multicollinearity among the variables in relation to P.T.O power requirement was analysed using VIF. Effect of parameters affecting the P.T.O power requirement was analysed using correlation. During analysis of rotavator, soil moisture content, speed of operation, depth of cut, width of cut, peripheral velocity of blade, no of blades, weight of the implement, type of blade and type of soil have a significant effect. For tractor operated sprayer, working pressure and discharge rate of pump expressed significant effect. Speed of operation in tractor operated VCR was detected a significant effect in wheat crop. For paddy thresher, moisture content of grain and straw, concave clearance and drum length exhibited a significant effect on the P.T.O power requirement. Weighted least square model was used to predict P.T.O power requirement in rotavator and paddy thresher. However, multiple linear regression model of tractor operated sprayer and stepwise regression model of tractor operated VCR for wheat crop were selected based on the highest R2 values. The R2 values obtained of rotavator, tractor operated sprayer, tractor operated VCR and paddy thresher were 0.984, 0.965, 0.411 and 0.92 respectively. Validation of the developed model was performed on 20 % of secondary data and the MAPE obtained during validation was in the reasonable limit.ennullThesis