Volume No. 5 Issue No.: 3 Page No.: 532-541 January-March 2011


Total Productivity, nutrient uptake and economics of rice-wheat cropping system as influenced by Crotalaria juncea green manuring


H.K.Patro*1, Ajay Kumar2, D. K. Shukla3 and B. S.Mahapatra

1. AICRP on Groundnut, OUAT, Bhubaneswar (INDIA)
2. Agronomy, KVK Gaina Aincholi, Pithoragarh, Uttaranchal (INDIA)
3. Agronomist Fertilizer Association of India, New Delhi (INDIA)
4. Central Jute and Allied Fiber Research Institute, Barrackpore, West Bengal (INDIA)


Received on : September 29, 2010




A field experiment was conducted in 2001-2002 and 2002 -2003 on the Mollisols of the crop Research Station at Pantnagar University to find out the effect of green manuring of Sun hemp (Crotalaria juncea) on total productivity, nutrient removal and economics of rice wheat cropping system. The experiment was conducted in split-split plot design keeping green manuring stages in main plot, levels of nitrogen to rice in sub plot and levels of nitrogen to wheat crop in sub-sub plot. . Application of 150 kg N/ha to rice resulted in yield of 6385 and 6521 in 2001-02 and 2002-03, respectively. The wheat yield due to Crotalaria juncea green manuring was 3792 and 3818 in 2001-02 and 2002-03, respectively. Integrated application of Crotalaria juncea green manuring and 150kg N/ha to rice and to succeeding wheat crop gave a production of 12.87 and 12.77 tonnes /ha from rice wheat sequence during 2001-02 and 2002-03 respectively. At this production level and fertilizer use, total removal of 246 kg N/ha, 45.1 kg P/ha and 275.5 kg K/ha was recorded by rice-wheat system. The same treatment also gave highest net return (Rs 49746 and 50852), and benefit: cost ratio (2.132 and 2.139) in 2001-2002 and 2002-03 respectively.


Keywords : Productivity, Crotalaria juncea, Rice-wheat, Nutrient uptake, Economics.