Adhatoda vasica is a member of family Acanthaceae. It is distributed in Indonesia, Malaysia, South Asia, India and Pakistan (Malik and Ghafoor, 1988).It is a medicinal plant and has been used in Ayurvedic and Unani medicines and used locally for the last 2000 years in India(Atal,1980). The roots and leaves of Adhatoda vasica are used to treat bronchitis, asthma, fever and jaundice. It grows in wastelands and degraded forests in the Aravalli hills in Alwar district of Rajasthan (Bhandari M M. 1990). Besides its allelopathic impact on herbaceous vegetation (Muller, C.H. 1969), it may affect the soil characteristics wherever it grows , hence an attempt has been made to evaluate the impact of this plant on the soil properties in the Sariska Tiger Project.

___________________________________________________________________________________

Keywords: Medicinal Plant, Allelopathic, Herbaceous. Sariska Tiger Project. Aravalli Hills, Acanthaceae.