A field experiment was carried out at 'C' Block Farm under Bidhan Chandra Krishi Viswavidyalya, West Bengal during 2011 and 2012. The experiment result revealed that seedling number, date of sowing and interaction showed significant effect on yield and equivalent yield of rice. The factors also affected the succeeding crop of lentil in the corresponding treatments. The results showed that 14 July transplanted aromatic rice performed better in terms of yield, and total uptake of N, P and K with different dates of transplanting. Two seedling sowing produced 14.91%, 12.59% and 12.73%, 19.39 higher average grain and equivalent yield over two and one seedling sowing respectively. Similarly highest lentil seed yield (0.66 t/ha) was recorded with residual effect of rice 3 seedling treatment. Maximum return and B: C ratio was obtained in rice-lentil sequence due to three seedlings through combination of 26th July transplanting. The uptake N, P and K was significantly superior with two seedling treatment and the second date of sowing in rice. In lentil the plots corresponding to third date of rice sowing had showed the significant nutrient uptake. Microbial population of the rice was higher than initial and after the rice lentil sequence with organic management.