Ayat, B. H. <br/><br/>
Effect of NPK fertilization rates and splitting on the grain yield and its components of two sorghum cultivars  [electronic resource]. 
 تأثير مستويات وتقسيم الجرعات السمادية على المحصول ومكوناته لصنفين من الذرة الرفيعة. 

 - P.1-14. 
<br/><br/>Includes reference. 
<br/><br/> A field experiment was conducted at the Agronomy Department Farm, Faculty of Agriculture, Assiut University during the 2012 and 2013 summer growing seasons to study the effect of NPK fertilization rates and splitting on the grain yield and its components of two sorghum cultivars. The experiment was carried out in a randomized complete block design (RCBD) using split-split plot arrangement with three replicates. Cultivars were occupied at main plot while NPK rates were allotted on sub plot and splitting doses ofNPK were allocated on sub sub plot. The obtained results showed that: Plant height, Panicle weight, Seed index and Grain yield /fed were affected significantly by studied cultivars in both seasons. Giza 15 cultivar surpassed the Dorado one and gained the highest mean values of mentioned traits in both seasons. The application of NPK fertilizers exerted a significant influence on plant height, panicle weight, seed index and grain yield /fed in the two growing seasons.  Key words: Sorghum, NPK. Fertilization rates and splitting. 
<br/><br/><br/>Summary in Arabic. 
<br/><br/><label>Subjects--Topical Terms: </label><br/>Sorghum--Fertilizers.<br/>Sorghum--Yields<br/>Sorghum--Composition<br/>Nitrogen fertilizers.<br/>Potassium fertilizers.<br/>Phosphatic fertilizers.