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Technical annual report 2000-01



Technical annual report 2000-01


Dept. of Regional Development, Primary Industry, Fisheries and Resources technical annual report; Department of Regional Development, Primary Industry, Fisheries and Resources technical and annual report; Reports; PublicationNT; Technical bulletin (Northern Territory. Dept. of Primary Industry and Fisheries) ; no. 295




Made available via the Publications (Legal Deposit) Act 2004 (NT).






Agriculture -- Northern Territory -- Periodicals; Fisheries -- Northern Territory -- Periodicals

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Dept. of Primary Industry and Fisheries

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Technical bulletin (Northern Territory. Dept. of Primary Industry and Fisheries) ; no. 295



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Technical Annual Report 2000/01 259 The use of pasture growth models combined with results from the Mount Sanford stocking rate trial and Kidman Springs has enabled the analysis of seasonal fluctuations and utilisation rate on stocking strategies. These tools are being used in conjunction with pastoral properties to investigate a range of grazing and stocking scenarios, particularly relating to flexible stocking rates and intensification. 4. Practical Burning Guidelines to Manage Pasture Communities and Woody Plant Populations Final analysis of data investigating the impact on fire on pasture condition and woody plants has been completed. Preliminary fire management guidelines have been formulated and promoted. A fire publication titled A Savanna Burning: Understanding and Using Fire in Northern Australia is drawing together research results and information from agencies across northern Australia. This is due for publication in September 2001. 5. The Impact of Woody Vegetation The effects of trees on native pasture production have been successfully incorporated into the GRASP pasture production model. Output from this model is currently being used to determine the likely economic impact of unchecked woody weeds on pastoral production. 6. Sustainable Grazing Practices Producer Demonstration Sites Aerial videography data has been collected from all sites and image analysis methods have been refined to estimate cover classes across extensive areas. It is anticipated that this will provide an insight into factors that determine grazing distribution and that predictive models of grazing pressure based on land type, distance to water, land condition, burning and previous grazing can be developed. If successful, these models will enable the most appropriate placement of water points and the determination of prescribed burning. The impact of fire on modifying grazing distribution in variable landscapes and distance to water has been investigated and quantified. PROJECT: Aussie GRASS: Spatial Validation of GRASP Pasture Production Models and NOAA Fire Scar Images in the Top End, NT and Kimberley, WA Project Officers: R. Dyer and L. Cafe Project Location: Katherine/VRD/Sturt Plateau Objective: Complete calibration and validation of NT GRASP models from SWIFTSYND sites throughout the Victoria River and Katherine regions. Collect an independent spatial validation data set for associated pasture communities throughout the Top End of the NT and the Kimberley, WA. Coordinate with QDNR to carry out validation of spatial models of NT GRASP sites throughout the northern NT and the Kimberley. Background: This is a sub-project of the Aussie Grass (Australian Grassland and Rangeland Assessment by Spatial Simulation) project. Aussie Grass is a National Climate Variability Program funded project administered by the Land and Water Resource Research and Development Corporation (LWRRDC). The project involves both research and extension organisations in New South Wales, South Australia, Western Australia, Queensland and the Northern Territory. The Aussie GRASS project aims to: Compare the ability of various regional models to simulate biomass and, where appropriate incorporation these into the model. Improve inputs to the model both spatially and temporally.