A field investigation was conducted during October, 2018 - March, 2019 at Port Blair, to assess the impact of seven mulching practices [areca nut leaves (chopped and unchopped), husk, silver oak leaves, and black polythene] on areca nut along with weed free and weedy check treatments in randomised complete block design (RCBD) with five replications. Tree is taken as a replication. Results revealed that weed free treatment biomass (259.1 g/m2) removed 82 kg (33.7 - 5.18 - 38.9 kg/ha of N-P-K) nutrients/ha. Black polythene mulching excluded the light supplies to weeds within 6 weeks time brought 100% weed control efficiency (WCE) and arrested the evapo-transpiration (ET) losses of weeds resulting in higher soil moisture content (SMC, %) in surface layer (0-10 cm). Organic mulches with lower WCE {77.63 (silver oak leaf mulch) - 92.93% (areca nut chopped leaf mulch)} than polythene mulching also contributed to higher SMC (0-10 cm). Mulching did not affect the SMC in deeper layer (10-30 cm). Weed free plots resulted in evaporation losses of moisture as that of ET losses of weedy check as evident form SMC. High cost of polythene mulches (` 41095/ha) when spread over its 5 year life span becomes cheaper than manual weeding (with recurring cost every year). However, due to every year organic mulching with farm generated residues soil organic matter may build up and thus enhances the water retention capacities and their ecological safety merits adoption. Soil (nutrient) and water conservation services of mulching in areca nut established in the study calls for its exploitation for weed management in islands.