To determine effects of simulated acid rain on the growth and yield of rice, soybean and sesame, and on the soil acidity, two cultivars of rice, soybean and sesame were exposed twice a week to one of four simulated rain acidities[pH 2.6, 3.6, 4.6 and 5.6(control)]. The plants were protected from ambient rain by a polyethylene film cover. No visible damage due to the simulated ac id rain was observed at any stage of growth for either of the crops. In rice, heading date, plant hight and yield components except ripening ratio were not significantly affected by the pH of simulated rain, but the ripening ratio and rough rice yield linearly decreased as the pH of simulated rain was decreased. In soybean, maturing date and yield components except 100 seed weight were nut significantly influenced by the pH of simulated rain, but the 100 seed weight and yield linearly decreased as the pH of simulated rain was decreased. Seed yield and the other agronomic characteristics of sesame were not significantly affected by the pH of simulated rain. Soil pH after cropping rice, soybean and sesame decreased as pH of simulated rain was decreased.