International Journal of Farm Sciences

A field experiment was conducted in the department of Forest Products, College of Forestry, Dr YS Parmar University of Horticulture and Forestry, Nauni, Solan to study the effect of transplanting time, spacings and fertilizers on herbage and oil yield of Mentha piperita. The study revealed that the crop transplanted on 15 February gave highest plant height (36.54 cm), herb yield (135.16 q/ha), oil content (0.26%) and oil yield (39.63 kg/ha). Similarly at 30x45 cm spacing, maximum plant height (36.52 cm), herb yield (143.46 q/ha), oil content (0.24%) and oil yield (36.05 kg/ha) were recorded. These coupled with the use of NPK (120:50:40 kg/ha) fertilizer gave maximum values for all the parameters like plant height (43.22 cm), herb yield (204.42 q/ha), oil content (0.36%) and oil yield (62.57 kg/ha) in M. piperita followed by application of vermicompost. When vermicompost (10 t/ha) was applied for organic cultivation of M piperita, the respective values for these parameters were 39.45 cm, 190,11 q/ha, 0.34 per cent and 57.29 kg/ha for plant height, herb yield, oil content and oil yield.