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Layer: NSW Maize Straw (SA2) (ID: 5)

Name: NSW Maize Straw (SA2)

Display Field: REGION_NAME

Type: Feature Layer

Geometry Type: esriGeometryPolygon

Description: This dataset estimates the location and mass in dry tonnes at 0% moisture content (MC) and in tonnes at harvest 'As is' MC of maize straw residues across NSW, Australia. This information was originally collated for the Australian Biomass for Bioenergy Assessment (ABBA) project and has been updated several times. It is available for use in the NSW BioSMART tool (Biomass Spatial and Modular Assessment of Resources Tool - https://www.dpi.nsw.gov.au/forestry/science/forest-carbon/biomass-for-bioenergy/nsw-biosmart) and on the National Map (https://nationalmap.gov.au/) platform. 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]. This dataset is mapped at the Statistical Area Level 2 (SA2). Each SA2 region shows the annual average tonnes of maize straw residues for the period July 2011 to June 2021 (average of 10 years). Cereal crop types included are Wheat, Oats, Barley, Sorghum, Maize, Rice and Other Cereals (including Triticale) - see All Cereal Straw layer or other individual crop layers. 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 and Regional Development - Forestry) and by applying calculated percentages of each crop production from the ABS 2015-16FY SA2 agricultural survey data to determine the distribution of residues at this level. Please note the location of residues for the SA2 maps is based on the 2015-16FY crop production distribution (and in some cases the 2020-21FY crop production distribution). 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 (https://www.dpi.nsw.gov.au/forestry/science/forest-carbon/abba) 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 October 2024.

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

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