Asian Journal of Plant Sciences1682-39741812-5697Asian Network for Scientific Information10.3923/ajps.2007.864.868ZamaniAli Salek NasseriAbolfazl 5200765Conducted researches showed that seed rate and tillage method could be affecting the yield of dryland wheat. Therefore, the objective of present study is to study tillage method and seed rate effects on grain yield and some yield components for dryland winter wheat at Maragheh located at the north-west of Iran. The Field soil was loamy clay and experiments were conducted for two years. Sixteen treatments were laid out in Completely Randomized Blocks (CRB) with a split-split plots design with four replications. Treatment combinations comprised two cropping years, 2 levels of tillage methods including TM1 = without mold board and TM2 = minimum tillage and 4 levels for seeding rates comprising SR1 = 100, SR2 = 125, SR3 = 150 and SR4 = 175 kg ha^{-1}. Results revealed that interaction of tillage method and seed rate had a significant effect on grain yield. Maximum and minimum yield acquired from TM2xSR3 and TM2xSR2 with yield of 1329 and 1097 kg ha^{-1}. The interaction of year and seed rate was statistically significant on 1000 grain weight, spike length, grains spike^{-1} and spike m^{-2}. It seems the year effect is originated from rainfall that occurred as 346.3 and 201.70 mm in the consecutive two years. Also, non significant effect was observed due tillage methods, seed rate and its interaction on plant height. Also, results showed that 1000 grain weight, spike length, grains spike^{-1}, spike m^{-2} and plant height ranged from 37.88 g, 6.323 cm, 21.422, 507.6, 71.144 cm to 27.45 g, 3.142 cm, 7.296, 301.00, 42.094 cm, respectively.]]>Asgari-Meidani, J.,2006Asrar, G. and E.T. Kanemasu,1985Ayaz, S., P. Shah and M. Ali,1997Bhatnager, G.S., M.K. Porwal and L.L. Dhakar,1991Khan, I.A., J. Bakht, W.A. Shah, N. Khan and I. Ullah,2002Kovac, K.,1978Moghaddam, M.,1999Nasseri, A. and H.A. Fallahi,2007Rajput, F.K., M.M.J. Rajput, S.M. Aslam and A.W. Baloch,1989Shamsabadi, H.A.,2006Steel, R.G.D. and J.H. Torrie,1980Stewart, B.A. and D.R. Nielsen,1990