This data relates to the proportion of farms who experienced significant irrigation salinity problems in the period 1998-1999. Proportion of farms with significant irrigation salinity problems is reported at the Statistical Division (SD) level for Australia. This data relates to broadacre and dairy farms run by owner managers. The data was collected by Resource Management Supplementary (RMS) survey interview which accompanied the ABARE Annual farm survey in 1998-1999.The data is presented at a scale of 25000000. Projection -P Albers Equal-Area Conic -D WGS84 -m 132 -o 0 -p -18 -p -36 -e 0 -n 0The following attributes are contained within the dataset; Sd code a a unique 3 digit code for Statistical Divisions (SD), Sd name a the name of the Statistical Division (SD),Irrig_sal- the proportion of farmers who experienced problems in 1998-1999.Ag_land_ha a hectares of agricultural land use in the Statistical Division (SD).Note that metropolitan areas are assigned a value of -99999, whilst areas with no data are assigned a value of -88888. See [further metadata](http://data.daff.gov.au/anrdl/metadata_files/pa_fdpisr9aa __01111a00.xml) for more detail.

Subsurface Acidification risk mapping derived from land quality attribution associated with soil-landscape mapping at the subsystem/phase level. See Resource Management Technical Report 298, Section 2.14, Department of Agriculture, 2005. This version updates two previous versions (metadata dates 08/09/2003 and 29/04/2004).

Soil subsurface acidity is a land quality which may impact upon a variety of agricultural land uses and is based on analysis and interpretation of the best available soil-landscape mapping dataset (DPIRD-027). See DAFWA Resource Management Technical Report 298 for a description of the qualities assessed and the methodology involved.