Influence of crop residue and nitrogen levels on nutrient content in grain wheat

In order to evaluation of crop residue and nitrogen fertilizer levels on micronutrient and macronutrients content in grain wheat, and also carbohydrate and dry matter, this study was conducted during 2012 - 2014 crop years. Experimental design was split- plot within randomized complete block with three replication.the treatments included crop residue levels : (CR1: 50% barley straw, CR2: 50% barley straw vetch (green manure), CR3: green manure (Viciaspp), CR4: 100% wheat straw, CR5: rape residue, CR6: No crop residue incorporation) as main plot and nitrogen fertilizer levels: (150, 270 , 360 kg urea ha-1) as subplot. The result showed that crop residue incorporation significantly affected the nitrogen, potassium, phosphorous, manganese, zinc, iron, copper and boron (p = 0.01). So the maximum macro and micro nutrient contents and dry matter was related to T2: 50% barley straw vetch (green manure) incorporation. also increase nitrogen fertilizer levels, increased Iron (Fe), Zinc (Zn), and Manganese (Mn) contents in grain wheat, but Copper (Cu) concentration decreased. Interaction of crop residue and N levels significantly affected the total dry matter of wheat, and 270 kg urea ha-1 in T2 treatments compared to 360 kg urea ha -1 in T6 dry matter was obtained 11.8 % higher.then crop residue and nitrogen fertilizer management important for increase quality and quantity of wheat.