Abstract
Abstract The results of a factorial experiment designed to study the effects of nitrogen, phosphorus and potassium, alone and in combination, on the yield of green herb, and on the yield and composition of the essential oil of Mentha piperita are reported. The experiment was made on reclaimed peatbog in Ireland. The main conclusion is that there is a significant increase in the yield of essential oil when nitrogen is added in high concentration. This also results in a decrease in the menthol content of the oil. Superphosphate also reduces the percentage menthol content of the oil. Mixtures of all three fertilisers reduce the percentage oil yield.
Sign-in/Register to access full text options 
Talk to us
Join us for a 30 min session where you can share your feedback and ask us any queries you have
Schedule a call
