Rangeland Ecology & Management

Get reliable science

'Trigger Points' For Stocking Decisions In Western NSW
Author
Hacker, R.B.
Alemseged, Y.
Carberry, P.M.
Smith, W.J.
Publisher
The Australian Rangeland Society
Publication Year
2006
Body

Stocking rate decisions in western NSW are complicated by variable and largely non-seasonal rainfall. We sought to define 'trigger points' that could assist stocking decisions, particularly when little skill is available in seasonal climate risk assessments based on the SOI Phase system. Long term daily pasture growth simulations obtained from the WinGRASP model were used to calculate an index of pasture growth over the following three months, together with the 20th, 50th and 80th percentile values for three-monthly growth, commencing at fortnightly intervals throughout the year. We worked with pastoralists throughout the Western Division and adjacent mixed farming areas to identify 3-monthly pasture growth profiles best suited to their location. Acceptable profiles were identified for 27 locations, together with the broad country types on the respective properties. Interpretation of these profiles should allow other pastoralists in the vicinity, managing similar types of country, to define their own trigger points to assist stocking decisions when useful seasonal risk assessments are not available, or to provide additional support for such decisions at those times when seasonal risk assessments are more useful. Both tactical and strategic management decision should benefit from the growth profiles defined.

Language
English
Resource Type
Text
Document Type
Conference Paper
Additional Information
3 - 7 September, 2006

Renmark, South Australia

ISSN 1323 660
Conference Name
Australian Rangeland Society 14th Biennial Conference
Keywords
stocking rate
models
risk management
seasonality
western New South Wales