Field experiment was carried out to determine the concentrations of N, P and K in various plant parts of six sesame cultivars at successive growth periods, Cultivars did not show differences in absolute concentrations of these nutrients. Increase in nutrient concentrations in all vegetative plant parts was observed until six weeks from sowing followed by gradual decline towards maturity in all six cultivars. Remobilization of N, P and K was found to occur from leaf, stem and root to the pods during the reproductive phase. The nutrient concentrations in the leaves were higher than the reported critical concentrations throughout the growth period indicating that the nutrient status of the crop was more than sufficient. However, the grain yields obtained for the six cultivars ranged from 109 to 348 kg ha−1 only.
