Abstract
A Field experiment was conducted during the growing season 2010-2011 at Talkief , Hamdania , Mahllbia , Shiekan and Namrood locations in Naniva provancy to evaluate effect of tillage systems ( no tillage , conventional tillage ) under different seed rates ( 80 , 100 , 120 kg/ ha) at that locations on yield & of wheat ant associated weeds . However , where are the other factors . The results showed that 37.71 of number and dry weight of grass weeds was reduction in no till if it compared with Cno-till . Also no. and Dwt . of broodleaves weed had been reduced up to 59.47 , 54.71 . respectively in no till comparing with Con . till too , While Wheat yield had increased in con.till up to 3.1 % compering with no till . On the other hand , as seed rates increased , dry weight or number of weed plants will be reduced and subsequently the yield will be increased . However , There was differences in number of Dry weight of narrow or broad leaves weeds as well as Yield according to soil moisture or the avarege of rainfall , which the moisture to be considered the first factor for the productive of crop in different rainfall area so that there was no benefit of increasing seed rates in high rainfall region or the crop sown under the supplementary irrigation for increasing crop yield Therefore yield was differences depending on density and growth of weeds at those locations.
