Pot experiment were conducted to study the effect of potassium humate (0.1 to 1.0%) soaking periods (3 to 24 hours) on seedling vigour of soybean (Glycine max L. Merrill), and black gram (Phaseolus mungo L.). The seeds of soybean and black gram were treated with potassium humate at ten different concentrations (0.1 to 1.0%) and different soaking periods from 3 to 24 hours. Seeds without treatment of potassium humate served as control. Seeds were then sown 2cm deep in soil in pot and at the end of tenth day seedling vigour was recorded. Results obtained showed that, maximum seedling vigour was recorded in 1.0% potassium humate and after 12 hours soaking period in soybean and black gram against control (water).
