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Abstract


The Effect Of Different N Fertilizer Applıcatıon With And Without Weed Control On Yield And Nutrient St A Tvs In Wheatplant
The main object of this work is to study the effect of different N rates on the yield and nutrient status of wheat under weed control or without weed control. The experiment was laid out on Agriculture Faculty-Fields by sowing T.Z.F-3 wheat variety. N fertilizer at tne rate of 0, 5, 10, 20 kg N/da as urea was applied at the time of sowing. The weed control was carried out by hand during 15 th., 30 th. and 45 th. day after germination. Wheat plants were harvested the straw and grain yield recorded and N, P, K determinations were caried out. According to the results of the experiment, the highest straw + grain yield of 1175 kg/da was obtained at 10 kg N/da rate as compared to straw + grain yield of 677 kg/da at control. The yield was decreased at highest N rates. The continuous weed control and the weed control after 15 days following germination have the highest effect for the grain + straw whereas, weed control done on 30 th. and 45 th. day after germination have the same effect as that of control. The increasing rates of N increased the content of N in straw and grain, whereas N- fertilization has no significant effect in P and K content of wheat straw and grain. The continuous weed control treatment increased the content of N and P in straw followed by weed control done on 15 th. day after germination whereas the continuous weed control treatment gave significant results only for P-content in grain.

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