The main purpose of the study was to evaluate the effect of organic acid on aluminium toxicity in rice rhizosphere. Interrelationship of organic acid and aluminum concentration in soil solution of rhizosphere and non-rhizosphere of rice (var Satabdi and IR 64) was studied by growing rice plant in plastic pot containing 500 g soil. Three organic acids viz. tartaric, oxalic and citric acids were identified and quantified rice rhizosphere and non-rhizoshere. Organic acids were found to be more in rhizosphere and early stage of crop growth, decrease sharply after 30 days of germination and found...