Ramadan, S. A. <br/><br/>
Impact of different nitrogen forms and K added on N and K losses into drainage water under cotton cultivation in clay soil of North Delta  [electronic resource]. 
 تأثير إضافة صور مختلفة من النتروجين وإضافة البوتاسيوم على فقد النتروجين والبوتاسيوم فى ماء الصرف تحت ظروف زراعة القطن فى الأرض الطينية بشمال الدلتا.‪ 

 - P. 776-790. 
<br/><br/>Includes references. 
<br/><br/> A field experiment was conducted to study the effect of applied fertilizer forms from nitrogen on N and K+ leaching through a clay soil into subsurface drains under cotton cultivation in north Delta) Egypt). The N-fertilizers forms (ammonium nitrate; ammonium sulphate and urea) were added to the soil with and without potassium sulphate fertilizer in recommended doses (70 and 48 unit/fed for N and K20, respectively) in two equal doses after the first irrigation and the second one, respectively. 
<br/><br/><br/>Summary in Arabic. 
<br/><br/><label>Subjects--Topical Terms: </label><br/>Cotton--Breeding.<br/>Cotton--Fertilizers.<br/>Potassium sulphate.<br/>Cotton--Irrigation.<br/>Nitrogen fertilizers.<br/>Ammonium sulfate.<br/>Clay soils--Egypt.<br/>Drainage water.