MIHIRANGI, D.P.A.2021-04-082021-04-082011UWU/EAG/07/0023http://www.erepo.lib.uwu.ac.lk/bitstream/handle/123456789/6410/UWULD%20EAG%2007%200023-10052019102536.pdf?sequence=1&isAllowed=yVermicomposting is an eco-friendly, socially sound and economically viable technology to manage the organic waste resources. It is valuable, because it is one of the cheapest solutions to overcome the dangerous effects of modernized agriculture. Even though vermicomposting is an age old process, due to the changes occurred in the technology in present scenario, it is advisable to modify the process with application of advanced techniques available. As the earthworms are best functioning in the aqueous medium, the moisture content plays a significant role in the vermicomposting process. Therefore, this study was conducted to evaluate the effect of moisture content on the quality of vermicompost and Perionyx excavatus earthworm population. Selected earthworms were cultured in a composting media containing cattle manure (10 kg), gliricidia (4.5 kg), grasess (4.5 kg) and banana stems (1 kg) with different moisture contents varying from 50 ± 5 %, 60 + 5 %, 70 ± 5 %, 80 ± 5 % and 90 ± 5 %. The control was done without incorporating the worms and each were replicated three times. Chemical analysis of vermicompost at 80+5% moisture content resulted the maximum level of N (0.634 %), P (0.66 %), K (0.414 %), Ca (4.73 %) and Mg (1.28 %). The level of C (9.27 %) and C/N ratio (14.67) were minimum in 80+5% moisture containing vermicompost processed by Perionyx excavatus in comparison to the other treatments. It is observed that 80 ± 5 % is the most suitable moisture content at which the highest worm population has recorded along with the high decomposition rates and high nutrient contents in the vermicompost with Perionyx excavatus. Keywords: Vermicompost, Perionyx excavatus, Moisture content, Nutrient content, earthworm populationenExport Agriculture Degree Programme (EAG)Thesis