
The field experiments were conducted in the field of Botany department of C.C.S. university campus, Meerut in the month of November to January (2018). 10%, 20% and 30% of aqueous extracts prepared from weed species namely Ageratum conyzoides L. used for the present investigation to determine their allelopathic potential on growth and, developmental changes of Pisum sativum L. The weed extracts showed a positive effect on soil parameters (pH, CEC) at 30% extract. However, 10% extract induced the physiological parameters of pea plant such as germination percentage, root and shoot growth, nodulation, biomass production, and moisture content. The extracts of Ageratum conyzoides have more positive effect at 10% concentration on pea crop.