Name: NSW Maize Straw by Landuse (SA2)

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Description: This dataset estimates the location and mass of maize straw residues across NSW. The mass is expressed​ in dry tonnes [0% moisture content (MC)] and also fresh (using MC of freshly harvested material), considering the location of related existing NSW landuse (i.e. cropping landuse). The ABBA Project (2015-2020) biomass spatial data has been used in conjunction with NSW landuse data to determine this finer scale biomass dataset for the Climate Change Fund - Biomass for Bioenergy Project (2018-2023) and will be available for use on a DPI interactive tool platform that will assist a range of stakeholders including landholders/farmers, project developers, policy makers and academics. The boundary features were extracted from the Australian Bureau of Statistics (ABS) Australian Statistical Geography Standard (ASGS 2016) digital boundaries [Copyright Commonwealth of Australia administered by the ABS] and the Department of Planning and Environment's NSW Landuse 2017 v1.2 layer. This dataset is mapped at the Statistical Area Level 2 (SA2) and associated landuse extent within the SA2 boundaries. Each SA2 region shows the annual average tonnes of maize straw residues for the period July 2013 to June 2018 (average of 5 years). The SA2 residues were derived using the ‘parent’ SA4 region residue totals (calculated using ABS ASGS Agricultural Commodities, Australia, cat. no. 7121.0 data cubes and from research carried out by the NSW Forest Science unit, Department of Primary Industries - Forestry) and by applying calculated percentages of each crop production from the ABS 2015-16 SA2 agricultural survey datato determine the distribution of residues at this level. Please note the location of residues for the SA2 maps is based on the 2015-16 crop production distribution and the associated 2017 landuse extent. The SA4 residue totals were calculated using Harvest Index (HI) values and based on a formula that considered a non-harvestable component and the retention of stubble for soil protection. The SA2 regions in the NSW North soil protection zone retained 1.5 t/ha of stubble and the NSW South soil protection zone retained 1 t/ha of stubble. Most of the moisture content (MC) percentages at harvest time were collated from the GRDC Grow Notes - Harvest (https://grdc.com.au/resources-and-publications/grownotes). Note: Some SA2 regions were merged and the results were combined. Most commonly merged regions were built up areas contained wholly within the same regional area (i.e. Goulburn and Goulburn Region were merged). Some small regions along the coast were also merged with adjacent regions for clearer mapping. For more information on the derivation of the residue volumes please contact the NSW Forest Science unit and look at: O’Connell D., Farine D., Dunlop M., Poole M., Grant T., Herr A., Poulton P., Unkovich M., Baldock J. & Woodward W. (2008) ‘Opportunities for energy efficiency, regional self-sufficiency and energy production for Australian grain growers, – Phase I’, Canberra, ACT, Australia: CSIRO and GRDC. Report to GRDC, Project Code: CSA00012. Herr A., Farine D., Poulton P., Baldock J., Bruce J., Braid A., Dunlop M., O'Connell D. & Poole M. (2011) ‘Harvesting stubble for energy in Australia – Take it or leave it? Phase II of Opportunities for energy efficiency, regional self-sufficiency and energy production for Australian grain growers’, Canberra, ACT, Australia: CSIRO and GRDC. Report to GRDC, Project Code: CSA00012. Herr A. & Dunlop M. (2011) ‘Bioenergy in Australia: An improved approach for estimating spatial availability of biomass resources in the agricultural production zones’, Biomass and Bioenergy 35(5):2298-2305. Herr A., O’Connell D., Dunlop M., Unkovich M., Poulton P. & Poole M. (2012) ‘Second harvest - Is there sufficient stubble for biofuel production in Australia?’, Global Change Biology Bioenergy 4:654-660. Last updated in September2022.

Copyright Text: NSW Forest Science, Department of Primary Industries - Forestry

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