Summary: The effects of increasing N rates on yield and nitrate content of sugar beet plant were studied under fıeld conditions on micro-plots. N was applied at 0, 5, 20, 50, 100, 200 and 500 mg/kg soil rates with two equal portions. At the end of the experiment, fresh and dry weights of the leaves and roots, and total-N and NO3-N contents of leaves and roots were determined. The results indicated that, all of the measured parameters were increased with the increasing nitrogen rates. The highest yield, total-N and NO3-N contents were obtained from the 200 and 500 mg/kg N treatments respectively.
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