_____________________________________________________________________________________________________ *Corresponding author: Email: jayaprabha2009@gmail.com; Uttar Pradesh J. Zool., vol. 44, no. 20, pp. 101-109, 2023 Uttar Pradesh Journal of Zoology Volume 44, Issue 20, Page 101-109, 2023; Article no.UPJOZ.2794 ISSN: 0256-971X (P) A Comparative Study on the Nutrients in Organic Fertilizers and Garden Soil in Tirunelveli Viji Siva Sakthi a and L. Jeyapraba a* a Zoology Department & Research Centre, Sarah Tucker College (Autonomous), Affiliated to Manonmaniam Sundaranar University, Tirunelveli, Tamil Nadu, India. Authors’ contributions This work was carried out in collaboration between both authors. Both authors read and approved the final manuscript. Article Information DOI: 10.56557/UPJOZ/2023/v44i203651 Editor(s): (1) Dr. Tunira Bhadauria, Feroz Gandhi P.G. Degree College, India. Reviewers: (1) Alabi Olusoji David, Durban University, South Africa. (2) Oghoje Stephen Ufuomaefe, Delta State University, Nigeria. Received: 01/07/2023 Accepted: 02/09/2023 Published: 13/09/2023 ABSTRACT Organic fertilizers are natural compounds made from waste or by-products and human assistance is limited to physical extraction or processing steps. Examples of commonly used organic matter include sewage sludge, food processing waste, composted animal manure, and urban biosolids. In this study, an attempt was made to examine the nutritional value of Lyroderma lyra (giant pseudo- vampire bat) bat guano, garden soil, and earthworm compost. Essential elements (macro elements - N, P, K, NO3, NO2, Pi, PO3), trace elements (Na, C, Fe, Mn, Zn, Cl), meso elements (Mg, Ca, SO4)) from this study The identified non-essential elements (Al), toxic elements (Ba) and pH were analysed and compared. Earthworm compost is rich in No3, No2, Pi, PO3, Ca, Mg, SO4, C, Fe, Zn, Mn and Cl. On the other hand, bat guano is rich in N, K and Na. The garden soil was rich in Cl, Mg, Ca, N. No toxic element was found in the garden soil but found in very low levels in both vermicompost and bat guano. In summary, these elements improve soil health and gradually Original Research Article