The Effect of Nitrogen and Farm Yard Manure on Yield and Nutrient Uptake in Davana (Artemisia pollens Wall, ex D.C.)

ABSTRACT The effect nitrogen and farm yard manure have on biomass production, essential oil yield, and nutrient uptake by davana (Artemisia pallens Wall, ex D.C.) was investigated in field experiments. Nitrogen application significantly enhanced the biomass yield, the essential oil yield, and the nitrogen, phosphorus, and potassium uptake. Yield of essential oil increased significantly with the application of 80 kg N/ha. The crop responded to the application of farm yard manure at one location only. The nitrogen use efficiency, the apparent nitrogen recovery, and the physiological efficiency were highest with application of 80 kg N/ha and decreased with further increases in nitrogen level.