Recently, among the various approaches for scheduling of irrigation water for its precise application, climatological approach based on the ratio between irrigation water (IW) and cumulative pan evaporation (CPE) is found to be the most appropriate, as it helps in working out permissible interval between successive irrigation and stage of coriander at which irrigation should be given. Farm yard manure (FYM) and Vermicompost is the principle source of organic manuree organic carbon in the organic matter act as a source of energy for soil microorganisms and upon mineralization release essential elements during crop growth. In addition to supply of available plant nutrients directly the use of FYM also mobilise the unavailable nutrients present in the soil. Therefore, to bridge gaps in scientific knowledge as stated above and to find out most suitable irrigation schedule based on IW/CPE ratio and organic manure application for coriander.