NDSS Lookup Table for Gippsland (compiled by Richard Eckard)

Average N response (kgDM/kgN)
Pasture Index Jan Feb Mar Apr May Jun Jul Aug Sep Oct Nov Dec
Low 7 3 4 7 5 5 6 8 9 9 8 7
Medium 8 4 6 10 9 7 10 13 16 13 12 9
High 9 5 8 14 12 10 15 18 22 18 16 12
Flood Irrigated ryegrass - Maffra 10 10 11 14 12 10 15 18 22 18 16 12
% Range in actual 22 22 22 35 32 34 34 27 25 25 24 24
Typical Response Time (days) 28-35 28-38 28-35 21-35 21-35 35-90 28-42 18-28 14-28 14-21 14-28 21-32
Flood Irrigated paspalum - Maffra 18 18 10 7 5 5 10 10 12 12 14 15
Typical Response Time (days) 17-21 17-21 21-28 28-35 28-35 35-90 60+ 30-40 21-30 18-21 18-21 18-21
Notes Ryegrass Olsen P Colwell K pH (H2O)
Low = < 30% < 12 ppm < 80 ppm <4.5
High = > 60 % > 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.
Summer nitrogen responses are highly dependent on adequate soil moisture.
Responses are for average responses to nitrogen applied early in the month and responses measure late in the same month.
Short regrowth times (eg 14-16 days) may reduce responses.
Flood Irrigation Comments.
Good surface drainage reduces waterlogging after flood irrigation.
Good late autumn rains may increase response of ryegrass in late autumn (irrigations often stopped in late April)

Data from a completed project funded by DPI and the Dairy Research & Development Corporation

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Last modified:16 August, 2004                         Please Note: Disclaimer             Authorised and maintained by: Richard Eckard
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