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Effect of rate and time of application of nitrogen fertilizer on the growth of grass in spring and grass nitrate nitrogen content

Effect of rate and time of application of nitrogen fertilizer on the growth of grass in spring and grass nitrate nitrogen content

Record of Agricultural Research (Belfast) 24: 49-54

The growth of grass in spring following different rates and times of application of N fertilizer was studied using swards which had previously been intensively managed. Levels of N were 75, 100 and 125 kg/ha and the N was applied from late Feb. to late March. Increasing the rate of N above 75 kg/ha resulted in only small, though significant, increases in DM [dry matter] yield. Yields in the late April/early May period were highest following N application before 17 March. Grass nitrate N levels suggested that with normal fertilizer rates there is little likelihood of producing toxic nitrate N levels in the spring growth of ryegrass dominant swards.

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Accession: 005266096

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