Influence of different levels of nitrogen on its uptake and productive efficiency of paddy varieties

A field experiment was conducted over a period of two years to assess the effect of nitrogen fertilizer on the relative uptake of nitrogen by grain, straw and total uptake by plant, productive efficiency and grain yield of three paddy varieties, viz. PB-1, Sarjoo-52 and Sita at 0, 40, 80 and 120 kg levels of N/ha. Increasing levels of nitrogen increased nitrogen uptake in grain, straw and total productive efficiency and grain yield. Among varieties, Sita showed its superiority in removing highest amount of nitrogen, productive efficiency and produced highest grain yield than the other two varieties.