During 2001/2002 and 2002/2003 winter seasons. two field experiments were
conducted at Sakha Agricultural Research Station to detect the role of sowing methods
and some weed control treatments on annual weeds and wheat yield. Concerning the effect on total annual weeds, results indicated that Afir
improved and Afir drilling methods significantly surpassed Afir broadcast method in its
effect on annual weeds in the first season. All studied weed control treatments
significantly reduced annual weeds during both seasons, as compared to weedy check.
Brominal plus Topik, hand weeding (twice) and Topik (alone) were highly effective
against annual weeds. The lowest fresh weights of total annual weeds were recorded
by Afir improved or Afir drilling method with the application of Brominal plus Topik. For the effect on wheat growth and yield components, data revealed that Afir
dnlling and Afir improved methods significantly surpassed Afir broadcast as it increased
fresh weight of wheat leaves in the second season; increased number and fresh weight
of tillers during the two seasons and produced the highest wheat grain yield in the
second season. Brominal plus Topik, Topik (alone) and Brominal significantly increased
fresh weight of wheat leaves; increased number and fresh weight of tillers and yielded
the highest grain yield during both seasons. The highest fresh weight of wheat leaves
was recorded by Afir drill or Afir improved methods with the application of Brominal plus
Topik. Also, these practices significantly increased number and fresh weight of tillers
and yielded the highest grain yield during both seasons. It could be concluded that Afir improved or Afir drill methods with the
application of Brominal plus Topik significantly effective against total annual weeds and
increased wheat grain yield.