Abstract: Orange and kinnow occupy an important place in the horticultural industry of the country as well as in J&K state. In the present study, resource use efficiency of orange and kinnow was analysed. The regression coefficient values of selected inputs under orange orchards, mainly human labour, manures + fertilizers, irrigation, plant protection and training/ pruning varied significantly at the five age groups of five years from 5^th to 28^th years, corresponded to overall values as 0.955, 0.012, -0.012, 0.013 and -0.050, respectively. Out of which human labour, manures + fertilizers and plant protection with positive sign indicated that with one per cent increase in the use of these inputs, the output could be increased by 0.96 per cent in case of human labour and 0.01 per cent each in other two inputs. The regression coefficient of training/ pruning was statistically significant but negative indicating that one per cent increase in expenditures on training/ pruning could decrease the output to the extent of 0.05 per cent. The marginal value productivities of human labour, manures + fertilizers and plant protection were positive with their values at 0.185, 110.452, 0.076, respectively, whereas that of training/ pruning (-0.638) and irrigation (-0.054) were negative thereby indicated that there still existed scope of investing on human labour, manures + fertilizers and plant protection. The overall regression coefficient values obtained from kinnow cultivation were 0.029, -0.024, 0.016, 0.015 and 0.138 for human labour, manures + fertilizers, irrigation, plant protection and training/ pruning, respectively, out of which human labour and training/ pruning were statistically significant, indicating that one per cent increase in expenditures on these two inputs could increase the output to the extent of 0.03 per cent and 0.14 per cent, respectively. The regression coefficients of irrigation, plant protection and manures + fertilizers were non significant. The marginal value productivities of human labour, irrigation, plant protection and training/ pruning were positive with their values at 0.031, 0.025, 0.014 and 0.175, respectively, whereas that of manures + fertilizers (-0.027) was negative thereby indicating that there still existed scope in the investment on human labour, irrigation, plant protection and training/ pruning.