Abstract
The experiment was conducted to find out the effect of plant spacing (15×10 and 20×15 cm) with two varieties i.e. IR64 (submergence susceptible) and IR64-Sub1 (submergence tolerant) under conventional and submerged condition at the National Rice Research Institute (NRRI),Cuttack Odisha during the Rabi season of 2018. Different planting densities were maintained using different spacing's. These include (S1) 15 cm × 10 cm, (S2) 15 cm × 20 cm. The experiment was laid out in a randomized complete block design with 3 replications. Spacing of 15 cm × 10 cm has maximum survival rate in submerged condition on IR64-Sub1 rice cultivar, this result suggests that higher planting density (15cm×10cm) rather than increased number of seedling hill-1 is necessary for getting higher yield of IR-64Sub1 rice cultivar in continuous submerged condition. (Where V1=IR 64, V2=IR-64 Sub1, S1=15cm×10cm, S2=20cm×15cm).
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