International Journal of Soil Science1816-4978xxxx-xxxxAcademic Journals Inc.10.3923/ijss.2018.28.34ShresthaRam Kumar PaudelSita WagleSamjhana GhimireSalikram YadavDeepak 12018131Background and Objective: Soil available boron can be the limiting factor for rice production in rainfed lowland condition. This study aimed to identify the external boron requirement of the rainfed lowland rice varieties. Materials and Methods: A field experiment was conducted during June-October, 2016 at Purkot, Tanahun, Nepal to assess the performance of rice varieties grown under rainfed condition. Using split plot design, three replicates of four rice varieties (Sukkhadhan-2, Sukkhadhan-4, DRR-44 and Ciherang sub-1) under four levels of soil boron (B) application (0, 1, 2 and 3 kg ha1) were cultivated. Results: We found that the significant effects of B application among rice varieties on yield and its associated traits; the genotypic differences, however, varied. On average, B application at the upper level -as compared to the control of no B application- increased the plant height, effective tiller numbers and effective grain numbers by 7, 3 and 5%, respectively. Similarly, it increased grain yield and straw yield by 38% and 12%, respectively. While, Sukkhadhan-2 appeared to be the highest grain yielding variety, the straw yield was the premier for Ciherang sub-1. Such B induced grain yield increment corresponded to the decline in unfilled grains proportion (43%)-the highest for Sukkhadhan-2. B also induced the 1000 grains weight (12%) and harvest index (15%). Conclusion: Hence, not only the genetic makeup but also the soil B application controls rice production under rainfed condition.]]>Ahmad, W., M.H. Zia, S.S. Malhi, A. Niaz and Saifullah,20122012pp: 77-114pp: 77-114Andersen, P.,200727331335Dhakal, D., S.C. Shah, D.M. Gautam and R.N. Yadav,2009Brassica oleracea var. botrytis) to the application of boron and phosphorus in the soils of Rupandehi district.]]>95666Ganie, M.A., F. Akhter, M.A. Bhat, A.R. Malik and J.M. Junaid et al.,2013107685Dobermann, A. and T. Fairhurst,20001st Edn.,Saleem, M., Y.M. Khanif, I. Fauziah, A.W. Samsuri and B. Hafeez,20111293300Huang, L., J. Pant, B. Dell and R.W. Bell,2000Triticum aestivum L. 'Wilgoyne').]]>85493500MOAC.,20012001Pandey, S. and H. Bhandari,20082008pp: 3-17pp: 3-17Dear, B.S. and R.G. Weir,20052005Dodds, D. and B. Golden,20152015Carson, B.,19921992Bajracharya, R.M., B.K. Sitaula, S. Sharma and A. Jeng,200733143158Dawadi, D.P. and M. Thapa,20152015pp: 42-52pp: 42-52Shrestha, R.K.,20153120123 Malhi, S.S., M. Raza, J.J. Schoenau, A.R. Mermut, R. Kutcher, A.M. Johnson and K.S. Gill,20038399108Lehmann, J. and G. Schroth,20032003pp: 151-166pp: 151-166De Sa, A.A. and P.R. Ernani,20162016Khan, R., A.H. Gurmani, A.R. Gurmani and M.S. Zia,20068805808Hussain, M., M.A. Khan, M.B. Khan, M. Farooq and S. Farooq,201219259262Atique-ur-Rehman, M. Farooq, A. Nawaz, A. Rehman and S. Iqbal,201538338354Bhatta, M.R., G.O. Ferrara, E. Duveiller and S. Justice,20042004221-229221-229NRRP.,20092009Prasain, S.,20162016Sandhu, N. and A. Kumar,20172017Rashid, A.,2006Pages: 34Pages: 34Ramanathan, S., P. Stalin, T. Thilagavathi, K. Nata Kajan and Y. Ankorion,20022002Taiz, L. and E. Zeiger,20105th Edn.,Dixit, D., N.K. Srivastava and S. Sharma,200214CO2-photosynthate into primary metabolites in relation to essential oil and curcumin accumulation in turmeric (Curcuma longa L.).]]>40109113Farooq, M., Z.A. Cheema and A. Wahid,201268189201Rehman, A., M. Farooq, Z.A. Cheema, A. Nawaz and A. Wahid,201414723733Ashraf, M., A. Rashid, M. Yasin and R.A. Mann,2004295860Yu, X. and P.F. Bell,20022525912602Shah, J.A., M.Y. Memon, M. Aslam, N. Depar, N.A. Sial and P. Khan,20114310211031Rashid, A., S. Muhammad and E. Rafique,20022002pp: 105-110pp: 105-110Hussain, F. and M. Yasin,20042004