Interpolated contours lines at 10 metre intervals produced by DPIRD (formerly DAFWA) from the Land Monitor project (1998-2000) DEM based on a 10 metre grid. This data set does not cover the entire south west region - see the coverage map in the metadata for the full area.

Interpolated contours lines at 2 metre intervals produced by DPIRD (formerly DAFWA) from the Land Monitor project (1998-2000) DEM based on a 10 metre grid. This data set does not cover the entire south west region - see the coverage map in the metadata for the full area.

Land capability for cropping in the south west of Western Australia based on analysis and interpretation of the best available soil-landscape mapping dataset (DPIRD-027). This assessment covers the production of rain-fed (non-irrigated) field crops under a cropping system that incorporates minimal tillage practices and stubble retention. This is a general assessment for common dryland crops grown over extensive areas (i.e. hundreds of hectares). It is best suited to the 350-600 mm rainfall zone where most extensive crops are grown (i.e. the wheatbelt), though may be extended to include some slightly higher rainfall areas. Crops included in this general assessment are wheat, barley, oats, narrow-leafed lupins, field peas, canola, chickpea and faba beans. Land capability refers to the ability of land to support a type of land use without causing damage. See DAFWA Resource Management Technical Report 298 for a description of the qualities assessed and the methodology involved. Capability ratings do not take into account factors such as the availability and quality of water supplies for irrigation or climatic risks such as frost or heat stress. Such factors need to be considered as a separate layer of information.

This dataset provides information about the areas of soil survey projects that have been compiled to create the Soil Landscape Mapping - Best Available (DPIRD-027) dataset as well as the scale and reliability of each survey.

The Crop Variety Testing Areas dataset contains several layers used by DAFWA to make recommendations about cropping for distinct regions: Crop variety testing areas 2001 Crop variety testing agriculture zones Crop variety testing rainfall zones The dataset has been adjusted to give complete coverage of the WA Wheatbelt.

Generalised land use regions based on their primary agricultural land use.

Soil-landscape mapping covering Western Australia at the best available scale (Version February 2019) attributed with the proportional allocation of WA Soil Groups to each map unit. It is a compilation of various surveys at different scales varying between 1:20,000 and 1:3,000,000.

The Wheatbelt boundary of Western Australia defines the area of cropping for wheat in Western Australia. This dataset was created in August 2009 to accurately define the limit of cropping for wheat in Western Australia. The western/southern limit was defined using interpretation of the best available aerial photography. The Clearing Line October 2002 was used to define the eastern limit of cropping. The data set updated in June 2012 to incorporate 2011 recapture of the Clearing Line to define the eastern limit of cropping.

Land capability for grazing in the south west of Western Australia based on analysis and interpretation of the best available soil-landscape mapping dataset (DPIRD-027). This assessment covers the grazing of sheep and cattle on broadscale dryland (i.e. nonirrigated) pastures in agricultural areas (receiving an average annual rainfall more than 350 mm). Land capability refers to the ability of land to support a type of land use without causing damage. See DAFWA Resource Management Technical Report 298 for a description of the qualities assessed and the methodology involved. Capability ratings do not take into account factors such as the availability and quality of water supplies for irrigation or climatic risks such as frost or heat stress. Such factors need to be considered as a separate layer of information.

Land capability for perennial horticulture in the south west of Western Australia based on analysis and interpretation of the best available soil-landscape mapping dataset (DPIRD-027). The assessment for perennial horticulture covers production of irrigated horticultural crops on plants with long life-cycles (typically trees, shrubs or woody vines). Included are orchard crops (e.g. apples, citrus, stone fruit, avocados, nuts, etc.) and vineyard crops (e.g. grapes and kiwifruit). Although the plants are perennial, crops are harvested annually. The assumptions for the land use as assessed include: • crops are grown for commercial production • plants are deep-rooted with roots typically extending to depths of 100 cm or more • plants are irrigated using drip, micro-jet or mini-sprinkler systems • fertilisers and herbicides, fungicides and/or pesticides are broadcast at least annually • mechanised cultivation occurs only during crop establishment • weeds are controlled by mowing, slashing or sprays • machinery access to the crop is required for spraying, pruning and/or harvesting • considers physical requirements only and ignores socio-economic factors. Land capability refers to the ability of land to support a type of land use without causing damage. See DAFWA Resource Management Technical Report 298 for a description of the qualities assessed and the methodology involved. Capability ratings do not take into account factors such as the availability and quality of water supplies for irrigation or climatic risks such as frost or heat stress. Such factors need to be considered as a separate layer of information.