Effect of Organic Manureson Yield and Essential Oil of sweet Flag in Konkan Region

Acorus calamus (Sweet flag) is one of the endangered medicinal plants mostly grown in wild without much attention. Also it is in high demand in pharmaceutical and perfumery industries. Hence, a study was undertaken of 2017–18 to assess the possibility of optimizing its rhizome yield and essential oil recovery by different source of organic manures based on recommended doses of nitrogen under field condition. Significantly maximum rhizome yield (4674.7 kg ha⁻¹) and essential oil recovery (1.87%) was obtained with Farm yard manure 100% of RDN. Hence this study illustrates the possibility of optimizing rhizome yield and essential oil content of A. calamus through organic manures only.