Soliman, I. E. <br/><br/>
Effect of herbicides and urea as additive on wheat, nutrient uptake, photosynthetic pigments and associated weed  [electronic resource]. 
 تأثير مبيدات الحشائش واليوريا كمادة منشطة على القمح وامتصاص العناصرالكبرى وصبغات التمثيل الضوئى والحشائش المصاحبة له.‪ 

 - P. 1393-1407. 
<br/><br/>Includes references. 
<br/><br/> Two field experiments were conducted during successive seasons of 2oo812oo9 and 2oo912010 at Sakha Agricultural Research Station to study the effect of herbicides and urea as an additive to herbicides on wheat, NPK uptake, photosynthetic pigments and associated weeds. The results indicated that using the recommended rate of herbicides, (isoproturon + diflufenican) at 300g aJ.Ited. for control total annual weeds, tribenuron-methyl at 6.09 a.i/fed. for control broad-leaved weeds and clodinafop propargyl at 21g aj.lted for control grassy weeds as applied alone post- emergence as well as hand weeding twice, gave excellent weed control (93.6, 68.0, 45.9 and 93.6 %), respectively. While, the same herbicides when applied at moderate rate (isoproturon + diflufenican) at 244.5g aj./fed, tribenuron-methyl at 4.5g a.i /fed and clodinafop propargyl at 15.75g aj/fed) mixing with 1% urea increased the herbicides efficiency in controlling the annual weeds by about ( 90.2, 65.9 and 44.5 %). Mixing 1% urea with the same herbicides at low rate (isoproturon + diflufenican at 165g a.i/fed, tribenuron-methyl at 3.09 a.i/fed and clodinafop propargyl at 10.5g a.i/fed) gave poor weed control and. were significantly less efficient than the other treatments at the first survey In the first season. 
<br/><br/><br/>Summary in Arabic. 
<br/><br/><label>Subjects--Topical Terms: </label><br/>Wheat--Composition.<br/>Wheat--Quality.<br/>Wheat--Yields.<br/>Wheat--Seeds.<br/>Plants--Effect of herbicides on.<br/>Plant nutrients.<br/>Photosynthetic pigments.<br/>Weeds--Control.<br/>Urea as fertilizer.<br/>Wheat--Weed control.<br/>Wheat--Growth.