Australian Standard AS4419
Soils for Landscaping & Garden Use

Update Released December 2018

 

The revised Australian Standard “Soils for Landscaping and Garden Use” was released in December 2018. There are substantial differences between the 2003 and 2018 versions, including a significant increase in the number of soil types and classifications.

 

SOILCOs technical expertise ensures our products meet end user requirements and project needs. In recent months further testing and development of products has occurred to ensure the performance standards for chemical and physical properties are met.

 

SOILCO has updated its technical information to confirm compliance with the new product classifications.

 

 

ClassificationAS4419:2018 Nominated Soilco Products
Landscape Soils (On Grade) (Table 1)Landscape Soil - Low Organic *1Turf Special
Landscape Soil - Medium Organic *2Gold Blend, Landscape Mix
Landscape Soil - High OrganicOrganic Soil
Low Density Soils (On Slab) (Table 2)Low Density Soil - Low Organic (B Horizon) Custom Mix #17
Low Density Soil - Medium Organic (A Horizon) *3Custom Mix #14
Soils for Turf & Lawns (Table 3)UnderlayTurf Special
Sports FieldsCustom Mix #11
Top DressingOrganic Top Dress
Specialist Soils (Table 4) Structural SoilCustom Mix #13
Wetlands SoilCustom Mix #6

Equivalent AS4419 :2003 Classification from Table 1; Scheme of Soils Testing.

*1 Natural Soil or Soil Blend.
*2 Organic Soil.
*3 Low Density Soil

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The new classifications explained;

 

Table 1: Landscape Soils (On Grade)

 

  • Landscape Soils are now classified as low organic, medium organic and high organic with low and high phosphorus levels.

 

  • The testing is more stringent for physical and chemical contaminants.

 

  • The revised Standard requires additional testing for the chemical properties of Landscape Soils, which is similar to the testing done for agricultural soils. In particular sodium, calcium, potassium and manganese are reported. Having a balance of these nutrients ensures landscape soils have good fertility, structure and beneficial soil biology.

 

  • Total available nitrogen has replaced ammonium and nitrogen drawdown testing for Landscape Soils.

 

 

Table 2: Low Density Media (On Slab)

 

  • This table is for soils used on an artificial base such as a slab. A feature of these soils is the parameters for bulk density, air-filled porosity and water-holding capacity, and is based on AS3743:2003 Potting Mixes

 

 

Table 3: Soils for Turf and Lawns

 

  • This table includes soils for Underlays, Sports Fields and Top Dressing.
  • A feature of this table is the organic matter allowed, and the testing for dispersibility, permeability and water repellence.

 

Table 4: Structural Support Soil and Wetlands

 

  • Structural Support Soil provides the chemical characteristics of the filler soil It is read in conjunction with Table 5, which provides a sieve analysis for the aggregate component.
  • The Wetlands Soil section is read in conjunction with Table 6, which provides a sieve analysis for wetland soils.