References
- Blaise , D , Singh , J V , Bonde , A N , Tekale , K U and Mayee , C D . 2005 . Effects of farmyard manure and fertilizers on yield, fiber quality and nutrient balance of rainfed cotton (Gossypium hirsutum) . Bioresource Technol , 96 ( 3 ) : 345 – 349 .
- Deka , Medhi B , Barthakur , H P and Barthakur , S N . 1996 . Effect of organic and inorganic source of nitrogen on the nutrients in soil and soil solution and growth of rice . J Indian Soc Soil Sci , 44 : 263 – 266 .
- Haefele , S M , Wopereis , M CS , Ndiaye , M K , Barro , E and Ould , Isselmou M . 2003 . Internal nutrient efficiencies, fertilizer recovery rates and indigenous nutrient supply of irrigated lowland rice in Sahelian West Africa . Field Crop Res , 80 ( 1 ) : 19 – 32 .
- Jackson , M L . 1967 . “ Soil chemical analysis ” . New Delhi (India) : Prentice Hall .
- Mahapatra , P , Panda , M M , Chalam , A B , Chakravorti , S P and Mohanty , S K . 1997 . Effect of green manuring and N fertilization on the yield and nitrogen use efficiency of wetland rice . J Indian Soc Soil Sci , 45 : 95 – 99 .
- Prasad , P VV , Satyanarayana , V , Murthy , V RK and Boote , K J . 2002 . Maximizing yields in rice–groundnut cropping sequence through integrated nutrient management . Field Crop Res , 75 ( 1 ) : 9 – 21 .
- Puste , A M , Bandopadhyay , S , Mishra , B P and Gunri , S K . 1999 . Effect of NPK and organic matter on the productivity and profitability in rice–oilseed cropping sequence . Oryza , 36 ( 4 ) : 335 – 338 .
- Rajput , A L . 1995 . Effect of fertilizer and organic manure in rice and their residual effect on wheat . Indian J Agron , 40 : 292 – 294 .
- Reddy , M N and Surekha , K . 2000 . Improving productivity of rice based cropping systems through pre-kharif sole/dual purpose legume green manures in a vertisol . Oryza , 37 ( 3 ) : 213 – 217 .
- Santra , G H , Das , D K and Mandal , L N . 1988 . Loss of nitrogen through ammonia volatilization from flooded rice fields . J Indian Soc Soil Sci , 36 : 652 – 659 .
- Saravanan , A , Velu , V and Ramanathan , K M . 1987 . Effect of combined application of bio-organic and chemical fertilizers on physico-chemical properties, nitrogen transformation and yield of rice in submerged soils of Cauvery delta . Oryza , 24 : 1 – 6 .
- SAS Institute . 2004 . “ SAS/STAT 9.1 users’ guide ” . Cary (NC) : SAS Institute .