NLWRANational Land and Water Resources Audit (Australia)
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A concurrent national environmental benchmarking program, the NLWRA, was conducted in the late 1990s and into the 2000s.
2008) and were adopted as the basis for a consistent national analysis and reporting of salinity risk (NLWRA 2001).
Soil salinity, sodicity, acidity and alkalinity, elemental toxicities, such as boron, chloride and aluminium, and compaction are important soil constraints to agricultural sustainability in many soils of Australia (NLWRA 2001).
It also cited a 2002 NLWRA analysis that 80 per cent of agricultural profit to the nation at full equity came from less than one per cent of the 454 million hectares in use at the time of the report.
NLWRA (2001) Australian Agricultural Assessment 2001, Vol.
On an areal basis, subsoil textures are generally indicated as clay for 89.4% of the HRZ, clay loams and light clays for 7.8%, and sands, sandy loams, and loams for 2.8% of the HRZ (NLWRA 2005).
NLWRA (2001) Australian dryland salinity assessment 2000.
NLWRA (2001) 'Australian Agriculture Assessment 2001.' (National Land and Water Resources Audit: Canberra, ACT)
For example, changes in the hydrological balance of many areas now mean that the threat of salinisation is among the greatest challenges to the dryland farming systems of Australia (NLWRA 2000).
Hillslope erosion is the predominant source of sediment in the region (NLWRA 2001), so filtering surface runoff has been identified as a key riparian buffer function and is one way to reduce the impact of significant erosion. Gallant J (2001) Topographic scaling for the NLWRA sediment project.