Response of upland rice cultivars under varying soil moisture regimes

Three upland rice (Oryza sativa L.) cultivars viz. CR 143-2-2, Annada and Cauvery, were grown in the field under three irrigation regimes. There was a significant reduction in grain yield in all the three rice cultivars with the decrease in irrigation regimes. Under higher moisture stress conditions, performance was best in CR 143-2-2 and poorest in Cauvery. At IW/PET = 0.5 the cultivar Cauvery did not flower at all. Flowering was delayed in all the cultivars with the decrease of irrigation regime.