NDSS Lookup Table for northern Tasmania

Average N response (kgDM/kgN)
Pasture Index Jan Feb Mar Apr May Jun Jul Aug Sep Oct Nov Dec
Ryegrass Low 5 4 5 8 7 6 5 8 9 10 9 6
Ryegrass Medium 7 5 6 11 9 8 11 12 13 14 13 9
Ryegrass High 9 6 8 14 13 12 14 16 17 18 16 12
Notes Ryegrass Clover Olsen P Colwell K pH
Low = < 30% >50% < 12 ppm <80 ppm <4.5
High = > 60 % 20-40% > 25 ppm > 275 ppm >5.5
           

Comments:
Responses need to be adjusted within the range given, based on rainfall and temperature for the current season.
Responses are quote for average responses to nitrogen applied early in the month and responses measure late in the same month.
Note: responses will be higher with irrigation in drier months.
Summer nitrogen responses are highly dependent on soil moisture, usually only adequate with irrigation.
Short regrowth times (eg 14-16 days) may reduce responses

 

 

Last modified: 13 July, 2016                         Please Note: Disclaimer             Authorised and maintained by: Richard Eckard
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